飞行器在高超声速飞行时,来流会对其前缘产生严重的烧蚀,因此需要对前缘进行钝化处理。而钝化会引起飞行器周围流场的变化,影响飞行器的性能。通过运用数值计算的方法,验证了加大钝化半径可以降低前缘的热流密度,研究了钝化对高超声速乘波体飞行器升阻比的影响,比较了不同钝化半径情况下飞行器的升阻比变化。研究表明钝化导致飞行器的升阻比下降且随着钝化半径增大升阻比降幅增大。

The leading edge would be seriously ablated by the flow as aerocraft was in hypersonic flight, so it must be blunted. But the bluntness would cause changes in the flow field around the aerocraft, which would affect the performance of aerocraft. Numerical simulation was used to prove increasing the radius of the leading edge can reduce the heat flux of it. The effect of the bluntness on the lift-drag ratio of the hypersonic waverider aerocraft was investigated to compare the changes of lift-drag ratio on the condition of different radiuses of leading edge. Investigation showed that bluntness caused the lift-drag ratio decrease, and along with the radiuses of the leading edge increase, the lift-drag ratio of aerocraft reduced more quickly.