摘要
在水洞中进行了突出式腔与陷落式腔的流场观测实验，对比分析突出式腔与陷落式腔的流场特点表明，陷落式腔的流激振荡模型不能直接应用于突出式腔，必须作修正；文中从基本方程出发，定性地讨论了引起突出式腔的流激振荡激励源，提出了一可能的修正方向．最后用格林函数给出了腔的辐射声压表达式．
In this paper,the now-field of two-dimensional protruding cavity and twodimensional trap cavity are visualized in water tunnel. The distinguishment of the featuresof two tapes of now-field are compared and analyzed. The conclusion is that the model of flow-induped oscillation of trap cavity can not be used directly to protruding cavity and must be corrected. From the basic equations, the sources that induce the oscillation of cavity by flow are analyzed qualitahvcly.
关键词
空腔
振荡
流噪声
流场观测试验
cavities,oscillations,flow noise,now field visualization tests
