| 高强驻波声场中的湍流 |
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| 引用本文： | 吴嘉,席葆树,许宏庆.高强驻波声场中的湍流[J].清华大学学报(自然科学版),2001,41(11):19-21. |
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| 作者姓名： | 吴嘉 席葆树 许宏庆 |
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| 作者单位： | 清华大学工程力学系 |
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| 摘 要： | 反射端声压级高于 14 0 d B时 ,驻波管声流旋涡结构会发生变化。利用流动显示和 L DV (L aser DopplerVelocimetry)技术对该问题进行了实验研究。结果表明 ,随着声压级的提高 ,管中规则稳定的旋涡结构逐渐变化 ,出现合并、破裂等现象 ,在高强声下声致流动开始呈现出一定的湍流特性。结果对认识高声强下的声流特性有重要意义。
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| 关 键 词： | 高强驻波 声流 流动显示 LDV 湍流 |
| 文章编号： | 1000-0054(2001)11-0019-03 |
| 修稿时间： | 2000年6月19日 |
Turbulence in high-intensity standing wave tube |
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| WU Jia,XI Baoshu,XU Hongqing.Turbulence in high-intensity standing wave tube[J].Journal of Tsinghua University(Science and Technology),2001,41(11):19-21. |
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| Authors: | WU Jia XI Baoshu XU Hongqing |
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| Abstract: | In a tube of standing wave, if the sound pressure level (SPL) of the end wall is greater than 140dB, the structure of acoustic streaming in it will begin to change. The problem was studied by using the flow visualization technique and laser Doppler velocimetry (LDV). The experimental results show that, with the appearance of vortex combining and breaking in the tube, the acoustic streaming presentes some turbulent characteristics apparently. The results have a great importance to the recognization of characteristics of acoustic streaming under high intersity sound pressure. |
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| Keywords: | high intensity standing wave acoustic streaming flow visualization LDV turbulence |
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