A New Method of Thermal Protection by Opposing Jet for a Hypersonic Aeroheating Strut  

作　　者：QIN Jiang NING Dongpo FENG Yu ZHANG Junlong FENG Shuo BAO Wen 

机构地区：[1]Harbin Institute of Technology

出　　处：《Journal of Thermal Science》2017年第3期282-288,共7页热科学学报（英文版）

基　　金：supported by Program(Nos.51476044 and 51606051);Innovative Research Groups (No.51421063) of National Natural Science Foundation of China etc

摘　　要：This paper presents the numerical investigation of thermal protection of scramjet strut by opposing jet in supersonic stream of Mach number 6 with a hydrogen fueled scramjet strut model using CFD software. Simulation results indicate that when a small amount of fuel is injected from the nose of the strut, the bow shock is pushed away from the strut, and the heat flux is reduced in the strut, especially at the leading edge. Opposing jet forms a recirculation region near the nozzle so that the strut is covered with low temperature fuel and separated from free stream. An appropriate total pressure ratio can be used to reduce not only aerodynamic heating but also the drag of strut. It is therefore concluded that thermal protection of scramjet strut by opposing jet is one of the promising ways to protect scramjet strut in high enthalpy stream.

关 键 词：thermal protection scramjet strut opposing jet 

分 类 号：TK401[动力工程及工程热物理—动力机械及工程]