A new technique for the control of a weak shock discharged from a tube
A new technique for the control of a weak shock discharged from a tube
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DOI：
10.1177/095440620421800403
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发表时间：
2004-04
期刊：
影响因子：
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通讯作者：
H. D. Kim;Y. Kweon;T. Aoki;T. Setoguchi
中科院分区：
文献类型：
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作者：
H. D. Kim;Y. Kweon;T. Aoki;T. Setoguchi
从管道中释放的冲击波会产生类似于音爆的脉冲噪声。脉冲噪声往往是导致流量装置性能恶化的主要因素，并对人体产生危害。目前工作的目标是开发一种新的技术，用于控制的脉冲波。利用简单的激波管进行了实验，研究了空腔/螺旋叶片系统对冲击波幅值的影响。结果表明，安装在管道出口处的空腔内螺旋叶片的具体形状对冲击波的大小有影响。对比了有无螺旋叶片的试验结果，验证了本控制技术的有效性。实验数据表明，目前的空腔/螺旋叶片系统的冲击波的峰值压力降低了约50%，与直管相比，是适合于减轻冲击波的大小。
Abstract A shock wave discharged from a tube leads to an impulsive noise that is similar to a sonic boom. The impulsive noise has often been a major factor in deterioration of the performance of flow devices and has hazardous effects on human beings. The objective of the current work is to develop a new technique for the control of the impulsive wave. Experiments using a simple shock tube were carried out to investigate the effect of a cavity/helical vane system on the magnitude of an impulsive wave. The results showed that the magnitude of the impulsive wave was influenced by the detailed configuration of the helical vane inside the cavity which was installed at the exit of a tube. The results of the tests with and without the helical vane were compared to validate the effectiveness of the present control technique. The experimental data showed that the present cavity/helical vane system reduced the peak pressure of the impulsive wave up to about 50 per cent, compared with a straight tube, and was suitable for alleviating the magnitude of the impulsive wave.