超声速逆向喷流的减阻与降热

Supersonic with counter-flowing jets on drag and heat-transfer reduction

关键词:  超声速流  逆向喷流+  阻力  数值仿真

Key words:  Supersonic flow  Counter-flowing jet+  Drag  Numerical simulation

摘要:

利用流动控制技术改变流场结构的方法,对逆向冷喷流将激波推离物体表面以达到减阻减热的效果,进行了数值模拟计算。通过计算给出了钝头体在超声速流场中有无逆向喷流的压力场和温度场的比较,结果表明,逆向喷流对钝头体表面的减阻和减热起到了明显的作用。

Abstract:

An active flow control concept using counter-flowing jets to significantly modify the external flow fields and strongly weaken or disperse the shock-waves of supersonic vehicles to reduce the wave drag was investigated.The blunt body with and without counter flowing jet was numerically simulated to validate the control technology.The results show that the counter flowing jet can push front shock wave far away from the head of the blunt body,which can reduce drag and temperature remarkably.