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    The design of ventilation system and blowing in gas turbine compartment
    (Altınbaş Üniversitesi / Lisansüstü Eğitim Enstitüsü, 2024) Mohammed Amen, Mohammed Bahjah M. Ameen; Koç, İbrahim
    The design of an efficient ventilation system for gas turbine compartments is a crucial issue in the gas turbine industry. The proper ventilation system design must maintain acceptable temperatures inside the compartment and also eliminate any possible gas leakage. This thesis study deals with a 3D numerical simulation of the thermal and flow fields within a gas turbine enclosure. A blowing system to cool the turbine casing and the exhaust frame is also considered in the simulation. Studying the enclosure ventilation system together with the turbine blowing system is considered a very practical and important matter and has not been discussed in another research previously. So, the originality of our research is distinguished by focusing on this side. The ventilation flow rates, and the duct cross section are selected based on a real-life situation. Software program is used to solve the governing equation together with the k-ω SST turbulence model and obtain the velocity and temperature contours within the enclosure. The results showed that the average velocity within the enclosure, except the region adjacent to the side walls and roof, has been about 5.5 m/s. Furthermore, the average temperature within the enclosure has been less than 100 oC . These values for velocity and temperature are within acceptable ranges and almost identical to the real operation data. Finally, the designed blowing system of the turbine casing and the exhaust frame has caused a significant reduction in the temperature from 450 oC in the interior to 200 oC at the surface. In conclusion, the design ventilation system, with the selected specifications, could successfully provide proper ventilation to both gas turbines and auxiliary compartments.