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爆炸波后的超声速气流常常挟带着灰尘,用皮托压力计去测量其总压时,应考虑灰尘运动的影响;高速飞行体在含雨滴、冰粒和云雾的大气中运动时,也应考虑固体和液体微粒的影响。这类问题,称为含灰气体超声速绕流,其流动图案如下:来流气体在钝体前形成头激波,气流到达物面时速度降为零;灰尘微粒经过激波面时参数不变,随后由于气体对它的阻滞和两者间的热交换,粒子速度下降,温度上升,到达物面时,灰尘粒子仍有一定的法向速度,它们将会在物面反跳和粉碎,甚至会对物面产生侵蚀作用。
The supersonic airflow after the explosion wave is usually entrained with dust. When measuring the total pressure with a Pitot pressure gauge, the influence of dust movement should be considered. When the high-speed flying body moves in the atmosphere containing raindrops, ice particles and clouds, Consider the effects of solid and liquid particles. This type of problem, called the flow of gas with supersonic supersonic flow, is characterized by the following flow pattern: the incoming shock gas forms a head shock before the bluff body, and the velocity drops to zero when the flow reaches the object surface; the parameters of the dust particles passing through the shock surface remain unchanged, Then due to its gas block and the heat exchange between the two, the particle velocity decreases, the temperature rises, reaching the object surface, the dust particles still have a certain normal velocity, they will rebound and smash the object surface, or even Will have erosion of the object surface.