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利用扩展的气穴方程初步研究了微造型表面上气穴发生的机理.使用连续卷积快速傅里叶变换(CC-FFT)求解表面的弹性变形,同时验证计算程序的有效性.数值结果表明:气穴易在微造型的几何形状发散处发生;气穴的发生与微造型的幅值和位置密切相关.较大的流场长宽比会使气穴区宽度增加;气穴化的面积会随着微造型幅值的增大而减小,但最终趋于稳定值.
The extended cavitation equation was used to study the mechanism of cavitation on the micro-shaped surface. The surface elastic deformation was solved by continuous convolution fast Fourier transform (CC-FFT), and the validity of the calculation program was verified. Numerical results show that : Cavitation tends to occur at the divergence of the micro-shaped geometry; the occurrence of cavitation is closely related to the amplitude and location of the micro-shape. Larger flow field length-width ratio will increase the width of the cavitation area; Cavitation area Will decrease with the increase of micro-modeling amplitude, but will eventually stabilize.