Conjugate Heat Transfer Analysis of Film Cooling Flows

• Published in: Journal of thermal science Vol. 15; no. 1; pp. 85 - 91
• Main Authors: Lu, Xiaochen, Jiang, Peixue, Sugishita, Hideaki, Uechi, Hideyuki, Suenaga, Kiyoshi
• Format: Journal Article
• Language: English
• Published: 01.03.2006
• Subjects: 共轭传热; 耦合计算; 薄膜冷却; 进风比率
• ISSN: 1003-2169; 1993-033X
• DOI: 10.1007/s11630-006-0085-8

The objective of this study is to evaluate the potential of various grids to satisfactorily simulate the development of a cooling film, using a coupled computation that takes into account the full geometry. Detailed computations of a single row of 30 degrees round holes on a flat plate are presented for blowing ratios of 0.764, 1.01 and 1.54. The simulation results are compared well with experimental data. The two-layer model gave more accurate results but consumed much more computational time than the standard wall functions. The k-ε turbulence model with wall functions with appropriate values of y^＋ is suitable for practical use. The results show the importance of the conjugate calculation for accurately describing the influence of the heat transfer within the cooling film.