Far-Field Noise Induced by Bubble near Free Surface
Far-Field Noise Induced by Bubble near Free Surface
复制标题
自由表面附近气泡引起的远场噪声
DOI：
10.1007/s13344-018-0003-3
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发表时间：
2018-02
影响因子：
1.6
通讯作者：
Chen Hai long
中科院分区：
文献类型：
--
作者：
Ye Xi;Li Jiang tao;Liu Jian hua;Chen Hai long
采用基于线性波动方程的边界元法求解了自由表面附近气泡的运动，分析了流体可压缩性对气泡动力学的影响。在气泡运动解的基础上，利用Kirchhoff动边界积分方程计算了气泡引起的远场辐射噪声，研究了自由液面对远场噪声的影响。结果表明，与不可压缩流体相比，可压缩流体中气泡的振动幅度减弱，自由表面的存在放大了流体可压缩性的影响。当气泡与观察者之间的距离远大于气泡与自由表面之间的距离时，观察者处的声压出现尖锐的波谷。随着气泡与自由表面距离的增加，波谷出现的时间延迟，波谷值增大。当观察者与气泡之间的距离减小时，观察者处的尖锐波谷消失。
The motion of a bubble near the free surface is solved by the boundary element method based on the linear wave equation, and the influence of fluid compressibility on bubble dynamics is analyzed. Based on the solution of the bubble motion, the far-field radiation noise induced by the bubble is calculated using Kirchhoff moving boundary integral equation, and the influence of free surface on far-field noise is researched. As the results, the oscillation amplitude of the bubble is weakened in compressible fluid compared with that in incompressible fluid, and the free surface amplifies the effect of fluid compressibility. When the distance between the bubble and an observer is much larger than that between the bubble and free surface, the sharp wave trough of the sound pressure at the observer occurs. With the increment of the distance between the bubble and free surface, the time of the wave trough appearing is delayed and the value of the wave trough increase. When the distance between the observer and the bubble is reduced, the sharp wave trough at the observer disappears.
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发表时间：
2013-09
影响因子：
3.3
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