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本文用积分关系法和隐式欧拉方法计算一元非定常流动方程,得到了迎面碰撞时,平面运动冲波到达物面前的流动参数值,然后按每个区域内流动参数不变的假设,计入复杂的波系干扰,给出了平面冲波自物面反射后的干扰流场结果。在来流M数为10、20,运动冲波M数为1.50、2.00、2.50的情况下,进行了计算,结果表明:干扰后驻点压力峰值与未干扰驻点压力之比为3到9;压力峰值与准定常压力之比为1.6到1.9;脉冲压力作用时间为2到7微秒(球头半径为0.05米)。
In this paper, the integral relationship method and the implicit Euler method are used to calculate the univariate unsteady flow equations, and the flow parameter values before the plane motion wave arrives at the head-on collision are obtained. Based on the assumption of constant flow parameters in each region, Into the complex wave system interference, given the plane wave from the surface reflection of the interference flow field results. The results show that the ratio of stagnation point pressure peak to uncorrected stagnation point pressure is 3 to 9 when the M number is 10,20 and the M number is 1.50, 2.00 and 2.50. ; Pressure peak to quasi-constant pressure ratio of 1.6 to 1.9; pulse pressure time of 2 to 7 microseconds (ball radius of 0.05 meters).