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75-534: Deriner Dam ( Turkish : Deriner Barajı ) is a concrete double-curved arch dam on the Çoruh River 5 km (3.1 mi) east of Artvin in Artvin Province , Turkey . The main purpose of the dam is hydroelectric power production and additionally flood control . Construction on the dam began in 1998, the reservoir began to fill in February 2012 and the power station was completed by February 2013. It will have

150-436: A 11.7 m (38 ft) diameter. The foundation required extensive excavation because layers of decompressed rock existed above the sound granodiorite rock. To secure the foundation, over 2,000 re-stressable post-tensioned rock anchors were installed. At the end of 2005, workers began pouring concrete for the dam's foundation but because of funding, this was delayed between September 2006 and September 2007. By January 2008,

225-753: A 670 MW power house and is the tallest dam in Turkey. The dam is being implemented by Turkey's State Hydraulic Works and constructed by a consortium of Turkish, Russian and Swiss companies. The dam is named after İbrahim Deriner, who died while serving as the Chief Engineer of its research team. In 1969, a survey of the energy potential of the Coruh River was carried out by the Electrical Power Resources Survey Administration and later potential dam foundations were investigated. Based on

300-461: A combined capacity of 670 MW and annual generation of 2,118 GWh. Water being transferred to the turbines does so by means of a 9 m (30 ft) diameter penstock . Once through the turbines, water exits the powerhouse via 74 m (243 ft) long horseshoe shaped tail-race tunnels. Turkish language To the west, the influence of Ottoman Turkish —the variety of the Turkish language that

375-475: A form of consonant mutation whereby a voiced obstruent, such as /b d dʒ ɡ/ , is devoiced to [p t tʃ k] at the end of a word or before a consonant, but retains its voicing before a vowel. In loan words, the voiced equivalent of /k/ is /g/; in native words, it is /ğ/. This is analogous to languages such as German and Russian , but in the case of Turkish it only applies, as the above examples demonstrate, to stops and affricates, not to fricatives. The spelling

450-510: A maximum of 7,000 m/s (250,000 cu ft/s) of water. The dam's other spillway consists of two tunnels, each on opposing banks behind the dam. The right tunnel is 459 m (1,506 ft) long and the left is 472 m (1,549 ft) long. Each tunnel is controlled by a 6.5 m (21 ft) high, 24 m (79 ft) long flap gate. Each of these tunnels have the same capacity as both combined can discharge up to 2,250 m/s (79,000 cu ft/s) of water. The reservoir behind

525-415: A negative suffix -me to the verb (the suffix comes after the stem but before the tense): Necla okula gitmedi ('Necla did not go to school'). In the case of a verbal sentence, an interrogative clitic mi is added after the verb and stands alone, for example Necla okula gitti mi? ('Did Necla go to school?'). In the case of a nominal sentence, then mi comes after the predicate but before

600-505: A new turbine design. Francis turbines are primarily used for producing electricity. The power output of the electric generators generally ranges from just a few kilowatts up to 1000 MW, though mini-hydro installations may be lower. The best performance is seen when the head height is between 100–300 metres (330–980 ft). Penstock diameters are between 1 and 10 m (3.3 and 32.8 ft). The speeds of different turbine units range from 70 to 1000  rpm . A wicket gate around

675-407: A verb in the form of the copula ol or y (variants of "be"). Examples of both are given below: The two groups of sentences have different ways of forming negation. A nominal sentence can be negated with the addition of the word değil . For example, the sentence above would become Necla öğretmen değil ('Necla is not a teacher'). However, the verbal sentence requires the addition of

750-436: A wide range of heads and flows. This versatility, along with their high efficiency, has made them the most widely used turbine in the world. Francis type units cover a head range from 40 to 600 m (130 to 2,000 ft), and their connected generator output power varies from just a few kilowatts up to 1000 MW. Large Francis turbines are individually designed for each site to operate with the given water flow and water head at

825-403: Is subject–object–verb . Turkish has no noun classes or grammatical gender . The language makes usage of honorifics and has a strong T–V distinction which distinguishes varying levels of politeness, social distance , age, courtesy or familiarity toward the addressee. The plural second-person pronoun and verb forms are used referring to a single person out of respect. Turkish is a member of

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900-453: Is a 249 m (817 ft) high, 720 m (2,360 ft) long double-curved arch dam . It has a base width of 60 m (200 ft) and a crest width at the top cantilever of 1 m (3.3 ft). A total of 3,400,000 m (4,400,000 cu yd) of concrete forms the dam's body which also contains its orifice spillway . This spillway consists of 8 2.8 m (9.2 ft) x 5.6 m (18 ft) flap gates that can discharge

975-508: Is a type of water turbine . It is an inward-flow reaction turbine that combines radial and axial flow concepts. Francis turbines are the most common water turbine in use today, and can achieve over 95% efficiency. The process of arriving at the modern Francis runner design took from 1848 to approximately 1920. It became known as the Francis turbine around 1920, being named after British-American engineer James B. Francis who in 1848 created

1050-404: Is a type of reaction turbine, a category of turbine in which the working fluid comes to the turbine under immense pressure and the energy is extracted by the turbine blades from the working fluid. A part of the energy is given up by the fluid because of pressure changes occurring on the blades of the turbine, quantified by the expression of degree of reaction , while the remaining part of the energy

1125-526: Is based on the dialect of Istanbul . This Istanbul Turkish ( İstanbul Türkçesi ) constitutes the model of written and spoken Turkish, as recommended by Ziya Gökalp , Ömer Seyfettin and others. Dialectal variation persists, in spite of the levelling influence of the standard used in mass media and in the Turkish education system since the 1930s. Academic researchers from Turkey often refer to Turkish dialects as ağız or şive , leading to an ambiguity with

1200-472: Is equal to that at the inlet to the draft tube. Using the Euler turbine equation, E / m = e = V w1 U 1 , where e is the energy transfer to the rotor per unit mass of the fluid. From the inlet velocity triangle, and Therefore The loss of kinetic energy per unit mass at the outlet is V f2 /2 . Therefore, neglecting friction, the blade efficiency becomes i.e. Degree of reaction can be defined as

1275-445: Is extracted by the volute casing of the turbine. At the exit, water acts on the spinning cup-shaped runner features, leaving at low velocity and low swirl with very little kinetic or potential energy left. The turbine's exit tube is shaped to help decelerate the water flow and recover the pressure. Usually the flow velocity (velocity perpendicular to the tangential direction) remains constant throughout, i.e. V f1 = V f2 and

1350-630: Is mutually intelligible with Azerbaijani . In particular, Turkish-speaking minorities exist in countries that formerly (in whole or part) belonged to the Ottoman Empire , such as Iraq, Bulgaria, Cyprus , Greece (primarily in Western Thrace ), the Republic of North Macedonia , Romania, and Serbia. More than two million Turkish speakers live in Germany; and there are significant Turkish-speaking communities in

1425-455: Is necessary, as these are major parameters affecting power production. Draft tube : The draft tube is a conduit that connects the runner exit to the tail race where the water is discharged from the turbine. Its primary function is to reduce the velocity of discharged water to minimize the loss of kinetic energy at the outlet. This permits the turbine to be set above the tail water without appreciable drop of available head. The Francis turbine

1500-612: Is one of the official languages of Cyprus . Turkish has official status in 38 municipalities in Kosovo , including Mamusha, , two in the Republic of North Macedonia and in Kirkuk Governorate in Iraq. Cyprus has requested the European Union to add Turkish as an official language, as it is one of the two official languages of the country. In Turkey, the regulatory body for Turkish is

1575-642: Is usually made to match the sound. However, in a few cases, such as ad 'name' (dative ada ), the underlying form is retained in the spelling (cf. at 'horse', dative ata ). Other exceptions are od 'fire' vs. ot 'herb', sac 'sheet metal', saç 'hair'. Most loanwords, such as kitap above, are spelled as pronounced, but a few such as hac 'hajj', şad 'happy', and yad 'strange' or 'stranger' also show their underlying forms. Native nouns of two or more syllables that end in /k/ in dictionary form are nearly all /ğ/ in underlying form. However, most verbs and monosyllabic nouns are underlyingly /k/. The vowels of

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1650-431: Is usually referred to as yumuşak g ("soft g"), written ⟨ğ⟩ in Turkish orthography , represents a vowel sequence or a rather weak bilabial approximant between rounded vowels, a weak palatal approximant between unrounded front vowels, and a vowel sequence elsewhere. It never occurs at the beginning of a word or a syllable, but always follows a vowel. When word-final or preceding another consonant, it lengthens

1725-690: The Aegean region, with its usage extending to Antalya . The nomadic Yörüks of the Mediterranean Region of Turkey also have their own dialect of Turkish. This group is not to be confused with the Yuruk nomads of Macedonia, Greece, and European Turkey, who speak Balkan Gagauz Turkish . The Meskhetian Turks who live in Kazakhstan, Azerbaijan and Russia as well as in several Central Asian countries, also speak an Eastern Anatolian dialect of Turkish, originating in

1800-661: The Germanic runic alphabets . With the Turkic expansion during Early Middle Ages ( c.  6th –11th centuries), peoples speaking Turkic languages spread across Central Asia , covering a vast geographical region stretching from Siberia all the way to Europe and the Mediterranean . The Seljuqs of the Oghuz Turks , in particular, brought their language, Oghuz —the direct ancestor of today's Turkish language—into Anatolia during

1875-605: The Laz language ). Kastamonu is spoken in Kastamonu and its surrounding areas. Karamanli Turkish is spoken in Greece, where it is called Kαραμανλήδικα . It is the literary standard for the Karamanlides . At least one source claims Turkish consonants are laryngeally-specified three-way fortis-lenis (aspirated/neutral/voiced) like Armenian, although only syllable-finally. The phoneme that

1950-629: The Oghuz group of the Turkic family. Other members include Azerbaijani , spoken in Azerbaijan and north-west Iran , Gagauz of Gagauzia , Qashqai of south Iran and the Turkmen of Turkmenistan . Historically the Turkic family was seen as a branch of the larger Altaic family, including Japanese , Korean , Mongolian and Tungusic , with various other language families proposed for inclusion by linguists. Altaic theory has fallen out of favour since

2025-437: The Ottoman Empire period ( c.  1299 –1922) is termed Ottoman Turkish , which was a mixture of Turkish, Persian, and Arabic that differed considerably and was largely unintelligible to the period's everyday Turkish. The everyday Turkish, known as kaba Türkçe or "vulgar Turkish", spoken by the less-educated lower and also rural members of society, contained a higher percentage of native vocabulary and served as basis for

2100-599: The Seljuq Turks , who are both regarded as the ethnic and cultural ancestors of the Ottomans , the administrative language of these states acquired a large collection of loanwords from Arabic and Persian . Turkish literature during the Ottoman period, particularly Divan poetry , was heavily influenced by Persian, including the adoption of poetic meters and a great quantity of imported words. The literary and official language during

2175-527: The Trabzon region of northeastern Turkey follows the reduced vowel harmony of Old Anatolian Turkish , with the additional complication of two missing vowels (ü and ı), thus there is no palatal harmony . It is likely that elün meant "your hand" in Old Anatolian. While the 2nd person singular possessive would vary between back and front vowel, -ün or -un, as in elün for "your hand" and kitabun for "your book",

2250-570: The Turkish Language Association ( Türk Dil Kurumu or TDK), which was founded in 1932 under the name Türk Dili Tetkik Cemiyeti ("Society for Research on the Turkish Language"). The Turkish Language Association was influenced by the ideology of linguistic purism : indeed one of its primary tasks was the replacement of loanwords and of foreign grammatical constructions with equivalents of Turkish origin. These changes, together with

2325-573: The 11th century. Also during the 11th century, an early linguist of the Turkic languages, Mahmud al-Kashgari from the Kara-Khanid Khanate , published the first comprehensive Turkic language dictionary and map of the geographical distribution of Turkic speakers in the Dīwān Lughāt al-Turk ( ديوان لغات الترك ). Following the adoption of Islam around the year 950 by the Kara-Khanid Khanate and

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2400-411: The 1940s tend to use the older terms of Arabic or Persian origin, the younger generations favor new expressions. It is considered particularly ironic that Atatürk himself, in his lengthy speech to the new Parliament in 1927, used the formal style of Ottoman Turkish that had been common at the time amongst statesmen and the educated strata of society in the setting of formal speeches and documents. After

2475-453: The 1960s, and a majority of linguists now consider Turkic languages to be unrelated to any other language family, though the Altaic hypothesis still has a small degree of support from individual linguists. The nineteenth-century Ural-Altaic theory, which grouped Turkish with Finnish , Hungarian and Altaic languages, is considered even less plausible in light of Altaic's rejection. The theory

2550-472: The French loanword parti ). Some words restored from Old Turkic have taken on specialized meanings; for example betik (originally meaning "book") is now used to mean " script " in computer science . Some examples of modern Turkish words and the old loanwords are: Turkish is natively spoken by the Turkish people in Turkey and by the Turkish diaspora in some 30 other countries. The Turkish language

2625-515: The Latin alphabet for speakers of eastern dialects. Some immigrants to Turkey from Rumelia speak Rumelian Turkish , which includes the distinct dialects of Ludogorie , Dinler, and Adakale, which show the influence of the theorized Balkan sprachbund . Kıbrıs Türkçesi is the name for Cypriot Turkish and is spoken by the Turkish Cypriots . Edirne is the dialect of Edirne . Ege is spoken in

2700-567: The Latin script, encoded for many of the dialectal variations between Turkish dialects, the modern Latin script fails to do this. Examples of this are the presence of the nasal velar sound [ŋ] in certain eastern dialects of Turkish which was represented by the Ottoman letter /ڭ/ but that was merged into /n/ in the Latin script. Additionally are letters such as /خ/, /ق/, /غ/ which make the sounds [ɣ], [q], and [x], respectively in certain eastern dialects but that are merged into [g], [k], and [h] in western dialects and are therefore defectively represented in

2775-466: The SOV structure has diminished relevance and may vary. The SOV structure may thus be considered a "pragmatic word order" of language, one that does not rely on word order for grammatical purposes. Consider the following simple sentence which demonstrates that the focus in Turkish is on the element that immediately precedes the verb: Ahmet Ahmet yumurta-yı Francis turbine The Francis turbine

2850-466: The TDK were newly derived from Turkic roots, it also opted for reviving Old Turkish words which had not been used for centuries. In 1935, the TDK published a bilingual Ottoman-Turkish /Pure Turkish dictionary that documents the results of the language reform. Owing to this sudden change in the language, older and younger people in Turkey started to differ in their vocabularies. While the generations born before

2925-539: The Turkish language are, in their alphabetical order, ⟨a⟩ , ⟨e⟩ , ⟨ı⟩ , ⟨i⟩ , ⟨o⟩ , ⟨ö⟩ , ⟨u⟩ , ⟨ü⟩ . The Turkish vowel system can be considered as being three-dimensional, where vowels are characterised by how and where they are articulated focusing on three key features: front and back , rounded and unrounded and vowel height . Vowels are classified [±back], [±round] and [±high]. The only diphthongs in

3000-572: The United States, France, the Netherlands, Austria, Belgium, Switzerland, and the United Kingdom. Due to the cultural assimilation of Turkish immigrants in host countries, not all ethnic members of the diaspora speak the language with native fluency. In 2005, 93% of the population of Turkey were native speakers of Turkish, about 67 million at the time, with Kurdish languages making up most of

3075-488: The adoption of the new Turkish alphabet in 1928, shaped the modern Turkish language spoken today. The TDK became an independent body in 1951, with the lifting of the requirement that it should be presided over by the Minister of Education. This status continued until August 1983, when it was again made into a governmental body in the constitution of 1982 , following the military coup d'état of 1980 . Modern standard Turkish

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3150-406: The aim of conducting research on Turkish. One of the tasks of the newly established association was to initiate a language reform to replace loanwords of Arabic and Persian origin with Turkish equivalents. By banning the usage of imported words in the press, the association succeeded in removing several hundred foreign words from the language. While most of the words introduced to the language by

3225-474: The areas of Kars, Ardahan, and Artvin and sharing similarities with Azerbaijani , the language of Azerbaijan. The Central Anatolia Region speaks Orta Anadolu . Karadeniz , spoken in the Eastern Black Sea Region and represented primarily by the Trabzon dialect, exhibits substratum influence from Greek in phonology and syntax ; it is also known as Laz dialect (not to be confused with

3300-513: The continuing work of the TDK to coin new Turkish words to express new concepts and technologies as they enter the language, mostly from English. Many of these new words, particularly information technology terms, have received widespread acceptance. However, the TDK is occasionally criticized for coining words which sound contrived and artificial. Some earlier changes—such as bölem to replace fırka , "political party"—also failed to meet with popular approval ( fırka has been replaced by

3375-524: The country is very high. The rising presence of this very similar language in Azerbaijan and the fact that many children use Turkish words instead of Azerbaijani words due to satellite TV has caused concern that the distinctive features of the language will be eroded. Many bookstores sell books in Turkish language along Azerbaijani language ones, with Agalar Mahmadov, a leading intellectual, voicing his concern that Turkish language has "already started to take over

3450-456: The dam has a catchment area of 18,389 km (7,100 sq mi), capacity of 1,970,000,000 m (7.0 × 10 cu ft) and regulating volume of 960,000,000 m (3.4 × 10 cu ft). The dam's power house is located underground on its right bank and has a width of 20 m (66 ft), length of 126 m (413 ft) and height of 45 m (148 ft). Contained in the power house are vertical Francis turbines that have

3525-455: The dam reached a height of 66 m (217 ft). By mid-2010, 2,300,000 m (3,000,000 cu yd) of the needed 3,400,000 m (4,400,000 cu yd) of concrete had been poured and 93% of the project was complete. The spillways within the dam's body were complete as well. On 24 February 2012, the dam was complete and began to impound its reservoir. The power station is expected to be operational by February 2013. The Deriner Dam

3600-508: The dam. The consortium started with the Russian company Technostroyexport and later expanded with Turkey's ERG Construction and the Swiss companies Stucky (engineering consulting), Andritz (turbines and hydromechanical works) and Alstom (generators, energy transmission and balance-of-plant). The Environmental Impact Assessment Report for the dam was completed and approved in 1995 and funding to begin

3675-406: The design of high-efficiency turbines to precisely match a site's water flow and pressure ( water head ). A Francis turbine consists of the following main parts: Spiral casing : The spiral casing around the runner of the turbine is known as the volute casing or scroll case. Throughout its length, it has numerous openings at regular intervals to allow the working fluid to impinge on the blades of

3750-510: The discovery and excavation of these monuments and associated stone slabs by Russian archaeologists in the wider area surrounding the Orkhon Valley between 1889 and 1893, it became established that the language on the inscriptions was the Old Turkic language written using the Old Turkic alphabet , which has also been referred to as "Turkic runes" or "runiform" due to a superficial similarity to

3825-436: The guide and stay vanes is to convert the pressure energy of the fluid into kinetic energy. It also serves to direct the flow at design angles to the runner blades. Runner blades : Runner blades are the heart of any turbine. These are the centers where the fluid strikes and the tangential force of the impact produces torque causing the shaft of the turbine to rotate. Close attention to design of blade angles at inlet and outlet

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3900-456: The highest possible efficiency, typically over 90% (to 99% ). In contrast to the Pelton turbine , the Francis turbine operates at its best completely filled with water at all times. The turbine and the outlet channel may be placed lower than the lake or sea level outside, reducing the tendency for cavitation . In addition to electrical production , they may also be used for pumped storage , where

3975-468: The lack of ü vowel in the Trabzon dialect means -un would be used in both of these cases — elun and kitabun . With the exceptions stated below, Turkish words are oxytone (accented on the last syllable). Turkish has two groups of sentences: verbal and nominal sentences. In the case of a verbal sentence, the predicate is a finite verb, while the predicate in nominal sentence will have either no overt verb or

4050-466: The language are found in loanwords and may be categorised as falling diphthongs usually analyzed as a sequence of /j/ and a vowel. The principle of vowel harmony, which permeates Turkish word-formation and suffixation, is due to the natural human tendency towards economy of muscular effort. This principle is expressed in Turkish through three rules: The second and third rules minimize muscular effort during speech. More specifically, they are related to

4125-429: The language reform, the Turkish education system discontinued the teaching of literary form of Ottoman Turkish and the speaking and writing ability of society atrophied to the point that, in later years, Turkish society would perceive the speech to be so alien to listeners that it had to be "translated" three times into modern Turkish: first in 1963, again in 1986, and most recently in 1995. The past few decades have seen

4200-513: The linguistic concept of accent , which is also covered with these words. Several universities, as well as a dedicated work-group of the Turkish Language Association, carry out projects investigating Turkish dialects. As of 2002 work continued on the compilation and publication of their research as a comprehensive dialect- atlas of the Turkish language. Although the Ottoman alphabet, being slightly more phonetically ambiguous than

4275-402: The modern Turkish language. While visiting the region between Adıyaman and Adana , Evliya Çelebi recorded the "Turkman language" and compared it with his own Turkish: Reforms Kemalism After the foundation of the modern state of Turkey and the script reform , the Turkish Language Association (TDK) was established in 1932 under the patronage of Mustafa Kemal Atatürk , with

4350-410: The national and natural dialects of Azerbaijan". However, the presence of Turkish as foreign language is not as high as Russian. In Uzbekistan, the second most populated Turkic country, a new TV channel Foreign Languages TV was established in 2022. This channel has been broadcasting Turkish lessons along with English, French, German and Russian lessons. Turkish is the official language of Turkey and

4425-454: The need for agricultural , not electric development was deemed a higher priority. As the demand for electricity in Turkey grew, the Çoruh Valley Project began its implementation. After negotiations and the signing of a protocol between the Turkish and Russian governments at the 1994 Turkish-Russian Mixed Economic Commission in Moscow, Turkey's State Hydraulic Works was authorized to move forward with

4500-607: The outside of the turbine's rotating runner controls the rate of water flow through the turbine for different power production rates. Francis turbines are usually mounted with a vertical shaft, to isolate water from the generator. This also facilitates installation and maintenance. Water wheels of different types have been used for more than 1,000 years to power mills of all types, but they were relatively inefficient. Nineteenth-century efficiency improvements of water turbines allowed them to replace nearly all water wheel applications and compete with steam engines wherever water power

4575-485: The personal ending, so for example Necla, siz öğretmen misiniz ? ('Necla, are you [formal, plural] a teacher?'). Word order in simple Turkish sentences is generally subject–object–verb , as in Korean and Latin , but unlike English, for verbal sentences and subject-predicate for nominal sentences. However, as Turkish possesses a case-marking system, and most grammatical relations are shown using morphological markers, often

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4650-435: The phenomenon of labial assimilation: if the lips are rounded (a process that requires muscular effort) for the first vowel they may stay rounded for subsequent vowels. If they are unrounded for the first vowel, the speaker does not make the additional muscular effort to round them subsequently. Grammatical affixes have "a chameleon-like quality", and obey one of the following patterns of vowel harmony: Practically,

4725-638: The preceding vowel. In native Turkic words, the sounds [c] , [ɟ] , and [l] are mainly in complementary distribution with [k] , [ɡ] , and [ɫ] ; the former set occurs adjacent to front vowels and the latter adjacent to back vowels. The distribution of these phonemes is often unpredictable, however, in foreign borrowings and proper nouns. In such words, [c] , [ɟ] , and [l] often occur with back vowels: some examples are given below. However, there are minimal pairs that distinguish between these sounds, such as kar [kɑɾ] "snow" vs kâr [cɑɾ] "profit". Turkish orthography reflects final-obstruent devoicing ,

4800-440: The principles of i-type vowel harmony in practice: Türkiye' dir ("it is Turkey"), kapı dır ("it is the door"), but gün dür ("it is the day"), palto dur ("it is the coat"). These are four word-classes that are exceptions to the rules of vowel harmony: The road sign in the photograph above illustrates several of these features: The rules of vowel harmony may vary by regional dialect. The dialect of Turkish spoken in

4875-518: The project was available in 1997. In 1998, the consortium received the site and construction commenced. Construction on the Deriner Dam began in January 1998, and by the end of 2005, the Coruh River had been diverted around the construction site and the dam's foundation was excavated and prepared. The river was diverted on the right-bank by means of a 937 m (3,074 ft) horseshoe-shaped tunnel with

4950-433: The ratio of pressure energy change in the blades to total energy change of the fluid. This means that it is a ratio indicating the fraction of total change in fluid pressure energy occurring in the blades of the turbine. The rest of the changes occur in the stator blades of the turbines and the volute casing as it has a varying cross-sectional area. For example, if the degree of reaction is given as 50%, that means that half of

5025-401: The remainder. Azerbaijani language , official in Azerbaijan, is mutually intelligible with Turkish and speakers of both languages can understand them without noticeable difficulty, especially when discussion comes on ordinary, daily language. Turkey has very good relations with Azerbaijan, with a multitude of Turkish companies and authorities investing there, while the influence of Turkey in

5100-400: The runner. These openings convert the pressure energy of the fluid into kinetic energy just before the fluid impinges on the blades. This maintains a constant velocity despite the fact that numerous openings have been provided for the fluid to enter the blades, as the cross-sectional area of this casing decreases uniformly along the circumference. Guide and stay vanes : The primary function of

5175-602: The same principles. S. B. Howd obtained a US patent in 1838 for a similar design. In 1848 James B. Francis , while working as head engineer of the Locks and Canals company in the water wheel-powered textile factory city of Lowell, Massachusetts , improved on these designs to create more efficient turbines. He applied scientific principles and testing methods to produce a very efficient turbine design. More importantly, his mathematical and graphical calculation methods improved turbine design and engineering. His analytical methods allowed

5250-406: The studies and investigations, a master plan for the river was started in 1979 and completed in 1982. The feasibility study for the Deriner Dam was not completed until 1987 and was carried out by the Swiss branch of Poyry Energy and Turkey's Dolsar Engineering. Several factors delayed construction of the dam during this period. The cost of relocating roads in such a mountainous area would be high and

5325-876: The total energy change of the fluid is taking place in the rotor blades and the other half is occurring in the stator blades. If the degree of reaction is zero it means that the energy changes due to the rotor blades is zero, leading to a different turbine design called the Pelton Turbine . The second equality above holds, since discharge is radial in a Francis turbine. Now, putting in the value of 'e' from above and using V 1 2 − V f 2 2 = V f 1 2 cot ⁡ α 2 {\displaystyle V_{1}^{2}-V_{f2}^{2}=V_{f1}^{2}\cot \alpha _{2}} (as V f 2 = V f 1 {\displaystyle V_{f2}=V_{f1}} ) Francis turbines may be designed for

5400-432: The twofold pattern (also referred to as the e-type vowel harmony) means that in the environment where the vowel in the word stem is formed in the front of the mouth, the suffix will take the e-form, while if it is formed in the back it will take the a-form. The fourfold pattern (also called the i-type) accounts for rounding as well as for front/back. The following examples, based on the copula -dir ("[it] is"), illustrate

5475-467: Was available. After electric generators were developed in the late 1800s, turbines were a natural source of generator power where potential hydropower sources existed. In 1826 the French engineer Benoit Fourneyron developed a high-efficiency (80%) outward-flow water turbine. Water was directed tangentially through the turbine runner, causing it to spin. Another French engineer, Jean-Victor Poncelet , designed an inward-flow turbine in about 1820 that used

5550-479: Was based mostly on the fact these languages share three features: agglutination , vowel harmony and lack of grammatical gender. The earliest known Old Turkic inscriptions are the three monumental Orkhon inscriptions found in modern Mongolia . Erected in honour of the prince Kul Tigin and his brother Emperor Bilge Khagan , these date back to the Second Turkic Khaganate (dated 682–744 CE). After

5625-673: Was used as the administrative and literary language of the Ottoman Empire —spread as the Ottoman Empire expanded. In 1928, as one of Atatürk's reforms in the early years of the Republic of Turkey, the Perso-Arabic script -based Ottoman Turkish alphabet was replaced with the Latin script -based Turkish alphabet . Some distinctive characteristics of the Turkish language are vowel harmony and extensive agglutination . The basic word order of Turkish

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