An Experimental Study of Travelling-Bubble Cavitation Noise
An Experimental Study of Travelling-Bubble Cavitation Noise
复制标题
行气泡空化噪声的实验研究
DOI：
10.1115/1.3242570
复制
发表时间：
1981
影响因子：
2
通讯作者：
M. L. Billet
中科院分区：
文献类型：
--
作者：
M. Hamilton;D. E. Thompson;M. L. Billet
文摘：从基于单个气泡破裂的噪声理论出发，分析了Schiebe头型上产生的高频行波气泡空化噪声。在用事故率归一化噪声水平后，-sigma C(p(Min))似乎为每次坍塌时辐射的噪声水平提供了一个合理的比例因子，其中sigma是空化数，C(p(Min))是头模上的最小压力系数。在10 kHz以上的频率和9.1至12.2 Mps(30至40 fps)的自由流动速度下，每次坍塌的噪声水平变化约为1/sigma的8.4次方，并且在恒定sigma/C(p(Min))的情况下与流速恒定。无论空化数或自由流速度如何，能量密度谱在10-100 kHz范围内都是平坦的。(作者)
Abstract : In this investigation, high-frequency travelling-bubble cavitation noise generated on a Schiebe headform is analyzed with regard to noise theories which are based on the collapse of a single bubble. After normalizing the noise level by an event rate, -sigma C(p(min)) appears to provide a reasonable scaling factor for the noise level radiated per collapse, where sigma is the cavitation number and C(p(min)) is the minimum pressure coefficient on the headform. At frequencies above 10 kHz and free-stream flow velocities between 9.1 and 12.2 mps (30 and 40 fps), the noise level per collapse varied as roughly 1/sigma to the 8.4 power, and was constant with the flow velocity for constant -sigma/C(p(min)). The energy density spectra were flat from 10 to 100 kHz regardless of the cavitation number or free-stream velocity. (Author)