| 封闭状态储运发射箱箱壁压力的子波分析 |
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| 引用本文： | 徐强,张福祥,廖光煊,范维澄.封闭状态储运发射箱箱壁压力的子波分析[J].实验流体力学,2001,15(3):79-83. |
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| 作者姓名： | 徐强 张福祥 廖光煊 范维澄 |
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| 作者单位： | 1. 中国科学技术大学
2. 南京理工大学机械学院 |
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| 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。
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| 关 键 词： | 燃气流场 压力测量 子波分析 频带 |
| 文章编号： | 1007-3124(2001)03-0079-05 |
| 修稿时间： | 2001年5月9日 |
Wavelet analysis of exhausted flow field pressure in closed container-launcher |
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| XU Qiang ,ZHANG Fu-xiang ,LIAO Guang-xuan ,FAN Wei-cheng.Wavelet analysis of exhausted flow field pressure in closed container-launcher[J].Experiments and Measur in Fluid Mechanics,2001,15(3):79-83. |
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| Authors: | XU Qiang ZHANG Fu-xiang LIAO Guang-xuan FAN Wei-cheng |
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| Institution: | XU Qiang 1,ZHANG Fu-xiang 2,LIAO Guang-xuan 1,FAN Wei-cheng 1 |
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| 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. |
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| Keywords: | exhausted flow field pressure measurement wavelet analysis frequency band |
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