Experimental investigation of acoustic oscillations over cavities

Experimental investigation of acoustic oscillations over cavities
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DOI：
10.1243/09544100jaero636
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发表时间：
2010-06
期刊：
Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering
影响因子：
--
通讯作者：
Youjun Zhu;O. Hua;Z. Du
Youjun Zhu;O. Hua;Z. Du
中科院分区：
其他
文献类型：
--
作者：
Youjun Zhu;O. Hua;Z. Du

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摘要通过对空腔壁面压力的测量，研究了低速自由流条件下的空腔湍流特性。研究了安装在管道壁上的空腔的特性。发现存在声模态。分析了声模态的性质及其与腔内水动力振荡的耦合。同时，对腔内振动模态进行了分析。根据实测数据，给出了模型的修正半经验公式。
Abstract The behaviours of turbulent flow over cavities at low-speed free stream are studied by performing wall pressure measurements. The characteristics of cavities mounted on the wall of a duct are investigated. It was found that an acoustic mode is present. The nature of the acoustic mode and its coupling with hydrodynamic oscillation in the cavity are analysed. Meanwhile, analysis was carried out to identify the oscillation modes in the cavity. A modified semiempirical formula for the model is introduced based on the measurements.