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Investigation of film cooling effectiveness enhancement by using corrugated spiral holes

AbdulWahid, Ammar Fakhir and Mat Lazim, Tholudin and Saat, Aminuddin and Kareem, Zaid Sattar (2015) Investigation of film cooling effectiveness enhancement by using corrugated spiral holes. International Review of Mechanical Engineering, 9 (4). pp. 360-367. ISSN 1970-8734

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Abstract

Film cooling represents one of the important game-changing technologies that has allowed the achievement of today’s high inlet turbine temperature to get high-efficiency gas turbine engines. Shear Stress Transport (SST) K-? was performed to investigate the flow structures and the development process of vortices in different sections (rectangular, hexagonal and circular) of a stationary gas turbine at blowing ratio equal to (0.5, 1.0, 1.5 and 2.0), while the jet film coolinghole angles equal to (90°, 60°, 45° and 30°). It was observed that higher freestream turbulence improves adiabatic effectiveness and heat transfer coefficient for the corrugation film cooling holes design and specially enhancement at holes angle equal to 30° with twisted angle equal to 360° and rectangular corrugation shape. Results show the effectiveness enhancement range of 20.1%-69.3%of the smooth film cooling hole. Numerical calculation of film cooling effectiveness is validated with reported numerical and experimental results

Item Type:Article
Uncontrolled Keywords:turbulent flowreferences, twisted holes
Subjects:T Technology > TJ Mechanical engineering and machinery
Divisions:Mechanical Engineering
ID Code:56053
Deposited By: Fazli Masari
Deposited On:15 Nov 2016 08:47
Last Modified:15 Feb 2017 00:38

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