Comparison of rans and u-rans for flat plate film cooling

Abdullah, Mohammad Kamil and Osama H., AbdulGuad and Mohammed, Akmal Nizam and Suleiman, Zaid (2014) Comparison of rans and u-rans for flat plate film cooling. In: International Integrated Engineering Summit (IIES 2014), 1-4 December 2014, Universiti Tun Hussein Onn Malaysia, Johor.

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Abstract

Film cooling has been extensively used to provide thermal protection for the external surfaces of gas turbine components. For the past 40 years, numerous number of film cooling hole designs and arrangements have been introduced. Due to broad designs and arrangements of film cooling, numerical investigation has been utilized to provide initial insight on the aerodynamics and thermal performance of the new film cooling designs or arrangements. The present work focuses on the numerical investigation of RANS and URANS analyses on a flat plate film cooling. The investigation aims to provide comparison between various turbulent models available for the Reynolds Average Navier Stokes (RANS) analyses and extended to unsteady Reynolds Average Navier Stokes (URANS). The numerical investigations make used of ANSYS CFX ver. 14 and were carried out at Reynolds Number, Re = 7,000 based on the hole diameter at blowing ratio, BR = 0.5. The results of the RANS analyses show significant influence of the turbulent models on the predicted aerodynamics and thermal performance of the film cooling. The result of URANS indicates limitation of RANS analyses to provide details on the eddied and vortices formation in film cooling flow structure

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:flat-plate film-cooling; CFD; CFX; RANS; URANS
Subjects:T Technology > TJ Mechanical engineering and machinery > TJ181-210.1 Mechanical movements
Divisions:Faculty of Mechanical and Manufacturing Engineering > Department of Plant and Automotive Engineering
ID Code:6314
Deposited By:Mrs. Nurhayati Ali
Deposited On:12 May 2015 16:17
Last Modified:12 May 2015 16:17

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