【摘要】 为研究火箭导弹在封闭式储运发射箱内发射时 ,由于密封盖的反射作用使弹箱间隙内存在的复杂燃气流场 ,通过对测量数据进行子波分析 ,得到了管 (箱 )壁压力时间历程曲线中的燃气射流段是由射流激波振荡 (低频 )和射流噪声 (高频 )两种流动成分组合而成 ,激波振荡沿管壁向弹头方向是衰减的 ,它在低频段聚积的能量与起始冲击波一起都对储运发射箱式定向器具有破坏作用。更多还原

【Abstract】 A set of experimental studies were conducted to study complicated internal exhausted flow field generated by missile which was launched from a closed container-launcher.Wavelet transform method was used to analyze the wall pressure-time history data,and shock wave oscillation(low frequency)and jet noise (high frequency) were found in the exhausted flow section.Shock wave oscillation is attenuated along launcher wall at the direction to missile head.Its energy focuses on low frequency band and it is harmful to container-launcher along with initial shock wave.更多还原