冲压发动机加速阶段进气道内动态特性

摘要

The dynamic characteristics in the integrated ramjet inlet during the boost and acceleration phase were studied by numerical simulations and wind tunnel tests. The results show the pressure oscillation in the inlet is close to a typical bulk mold instability in the phase,and the pressure oscillation frequency grows a little and the relative pressure oscillation amplitude decreases with the increase of flight Mach number, the maximum pressure possibly exceeding the stagnation pressure.%对整体式火箭冲压发动机助推加速段进气道内的动态特性进行了数值模拟和风洞试验研究.结果表明,助推加速段进气道通道内压强振荡接近于一种整体模式的不稳定振荡；其振荡频率随马赫数增大略有升高,相对振荡幅度随马赫数增大而下降；在所研究范围内,进气道通道内的最高压强有可能超过来流总压.