https://hdl.handle.net/20.500.12619/96276 Tue, 14 Apr 2026 22:50:29 GMT 2026-04-14T22:50:29Z https://hdl.handle.net/20.500.12619/96345 Discharge Calculation in Interfering Walls By Modified Total Drawdown-Discharge Eguations Özyol, Ahmet Hikmet Bu araştırmada, girişim yapan kuyularda, farklı düşüm, rurKiı yarıçap ve farkı çalışma süresi olması halinde kuyuların debilerinin hesabı için geliştirilmiş toplam düşüm - debi denklemlerinden faydalanılmıştır. Ayrıca basınçsız akiferdeki kuyular için tam toplam düşüm debi denklemi kullanılmıştır; In this research it was attempted to calculate discharges of inter- fering wells in the case of different drawdowns, diameters and opera- ting periods by means of modified total drawdown discharge equations. Also exact total drawdcwn - discharge equation was used for the wells which are in unconfined aquifers. Thu, 01 Jan 1981 00:00:00 GMT https://hdl.handle.net/20.500.12619/96345 1981-01-01T00:00:00Z https://hdl.handle.net/20.500.12619/96344 An Investigation of Breaking Criteria For Shoaling Oscillatory Waves Kırkgöz, Salih Sığlaşan sudaki salınım dalgalarının kırılma kriterleri t zerine bir araştırma Bu çalışmada, geometrik ve kinematik kırılma kriterlerinin sığlaşan sudaki şahmın dalgalarına uygulanabilirliği deneysel olarak incelenmektedir. Kırılma noktasındaki dalga tepesi yüksekliğinin su derinliğine ora nı nb/db, 1/ 4,45 ve 1/15,00 taban eğimleri arasında 0,78 sabit değerine yaklaşmaktadır. Gene bu taban eğimleri arasında dalga tepesindeki noktasal hızın, u1 , yerel dalga yayılma hızına, cb, oranının maksimum değeri 0,91 olarak bulunmuştur. Böylece, bu çalışmadaki bulgulardan ubc nin c„ ye eşitliği, sıçrayarak kırılan dalgalar için, görülememiştir. Sonuç olarak denebilir ki, sıçrayarak kırılan salınım dalgalarının kırılma tarifi sadece geometrik bir kriterle yapılabilir.; S u m m a r y: An experimental study is made to show the applicability of the two breaking criteria, geometrical and kinematical, to shoaling oscillatory vvaves. It is found that the ratio of wave crest elevation to vvater depth at the breaking point, nb db, remains reasonably constant at a value of 0,78 över the range of beach slopes between 1/4,45 and 1/15,00. In this slope range, the maximum value of the ratio of the crest partide velocity, , to the local wave celerity, Cb, is found to be 0,91. Thus, the common assumption that w,,.- equals Cb during the production of plunging breakers is not substantiated by the results of these ejcperi- ments. Consequently, it may be stated that the definition of the plunging breakers can only be made using a geometrical criterion. Thu, 01 Jan 1981 00:00:00 GMT https://hdl.handle.net/20.500.12619/96344 1981-01-01T00:00:00Z https://hdl.handle.net/20.500.12619/96343 Efficiency Improvement And Superiority of Steam Injection İn Gas Turbines Borat, Oğuz An open cycle gas türbine with a heat exchanger and its modifica- tions have been studied. These modifications include the combinations of the gas türbine with a steam injection system and the gas türbine with a closed cycle steam türbine. The steam is generated by a waste heat boiler. It was found that in both cases the efficiency and the net output of the gas türbine increased considerably of the order of 20 to 40 %. In order to define the superiority regions of the systems studied in various ranges of power output, an economic analysis per unit power has been done. For short duration, intermittent type of operation the steam injection was found superior. Above this mode of operation. the operational modes of electric base and continuous were covered by the gas türbine combined with the steam türbine. Thu, 01 Jan 1981 00:00:00 GMT https://hdl.handle.net/20.500.12619/96343 1981-01-01T00:00:00Z https://hdl.handle.net/20.500.12619/96342 The Structural Modification of Al-Si Alloys Yılmaz, Fevzi; Elliott, Roy % 14 - 20 Si içeren Al—Si alaşımları farklı şartlarda katılaştırılmış- lardır. ötektik ve primer silisyum kristallerinin yapısal özellikleri optik mikroskopla incelenmiş ve farklı büyüme şartlarından kaynaklanan farklı kristal yapıları gözlenmiştir. Stronsiyum ilavesi, silisyum kristallerinde tedrici (ani olmıyan) bir yapısal dönüşüme neden olmaktadır.; Abstrack: Al—Si alloys ranging in composition from 14 to 20 % by wt. of Si, werc solidified at different growt conditions. Observations made by op- tical microscopy indicate that eutectic and primary Silicon crystals can show several growt morphologies resulting from various growt processes. İt was observed that the morphological transition in Silicon crystals due to strontium addition is gradual rather than abrupt. Thu, 01 Jan 1981 00:00:00 GMT https://hdl.handle.net/20.500.12619/96342 1981-01-01T00:00:00Z