Interpretation of gas-film cooling against aero-thermal heating for high-speed vehicles

作     者：Ming DONG 

作者机构：Department of MechanicsTianjin UniversityTianjin 300072China Tianjin Key Laboratory of Modern Engineering MechanicsTianjin 300072China 

出 版 物：《Applied Mathematics and Mechanics(English Edition)》 (应用数学和力学（英文版）)

年 卷 期：2016年第37卷第12期

页      面：1615-1630页

核心收录：

学科分类：080103[工学-流体力学] 08[工学] 080104[工学-工程力学] 082504[工学-人机与环境工程] 0825[工学-航空宇航科学与技术] 0801[工学-力学（可授工学、理学学位）] 

基　　金：Project supported by the National Natural Science Foundation of China(Nos.11472189 and11332007) 

主　　题：film cooling aero-thermal heating numerical simulation laminar-turbulenttransition linear stability analysis 

摘      要：The possible application of the film-cooling technique against aero-thermal heating for surfaces of high-speed flying vehicles is discussed. The technique has been widely used in the heat protection of gas turbine blades. It is shown in this paper that, by applying this technique to high-speed flying vehicles, the working principle is fundamentally different. Numerical simulations for two model problems axe performed to support the argument. Besides the heat protection, the appreciable drag reduction is found to be another favorable effect. For the second model problem, i.e., the gas cooling for an optical window on a sphere cone, the hydrodynamic instability of the film is studied by the linear stability analysis to observe possible occurrence of laminar-turbulent transition.