封闭状态储运发射箱箱壁压力的子波分析  

Wavelet analysis of exhausted flow field pressure in closed container-launcher

作　　者：徐强[1] 张福祥[2] 廖光煊[1] 范维澄[1] 

机构地区：[1]中国科学技术大学火灾科学国家重点实验室,安徽合肥230026 [2]南京理工大学机械学院,江苏南京210014

出　　处：《流体力学实验与测量》2001年第3期79-83,共5页Experiments and Measurements in Fluid Mechanics

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。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.

关 键 词：燃气流场 子波分析 封闭状态 储运发射箱 火箭导弹 发射 箱壁压力 射流激波振荡 射流噪声 激波振荡 

分 类 号：O354.5[理学—流体力学] TJ768[理学—力学]