標題: Investigation of boundary layer thickness and turbulence intensity on film cooling with a fan-shaped hole by direct numerical simulation
作者: Fu, Wu-Shung
Chao, Wei-Siang
Tsubokura, Makoto
Li, Chung-Gang
Wang, Wei-Hsiang
機械工程學系
Department of Mechanical Engineering
關鍵字: Film cooling;Direct numerical simulation;Boundary layer thickness;Turbulence intensity
公開日期: 1-八月-2018
摘要: Effects of the mainstream boundary layer thickness and the turbulence intensity on film cooling under low Reynolds number conditions are studied in this work by the direct numerical simulation (DNS). In other to solve low-speed compressible flow problems, several methods of Roe scheme, preconditioning, dual time stepping, and LUSGS are adopted to solve governing equations. Results reveal that a horseshoe vortex appears with a thicker mainstream boundary layer, and thus the lateral coverage of the coolant fluid has increased significantly. In addition, the existence of turbulence intensity eliminates the blow-off phenomenon, which happens in a thin mainstream boundary layer condition and enhances the film cooling effectiveness.
URI: http://dx.doi.org/10.1016/j.icheatmasstransfer.2018.05.017
http://hdl.handle.net/11536/148009
ISSN: 0735-1933
DOI: 10.1016/j.icheatmasstransfer.2018.05.017
期刊: INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
Volume: 96
起始頁: 12
結束頁: 19
顯示於類別:期刊論文