圆盘空化器超空泡形态三维数值模拟研究

基于结构化网格，运用N-S方程及k一ε湍流方程对均质流场求解，引入修正的Rayleigh-Plesset方程模拟空泡问题。对三维圆盘空化器在不同空化数下进行超空化流动数值模拟，将仿真结果与经验公式进行对比，二者具有良好的一致性。并且解决了带攻角圆盘空化器生成超空泡的数值模拟问题，详细分析了带攻角圆盘空化器生成超空泡的形态特征，总结了带攻角圆盘空化器与无攻角圆盘空化器的优缺点，为优化超空泡形态，实现高效减阻提供了参考依据。

Numerical Simulation on the Shape of Natural Supercavity Based on Full Three Dimensional Disk-Cavitator

The homogeneous flow field was solved by N-S equations and k-ε turbulence equations and the supercavity was simulated by modified Rayleigh-Plesset equation based on the structured mesh, fhe supercavity flow of the three dimensional disk-cavitator was numerically simulated under different cavitation numbers. The research shows that the simulation result of full three-dimensional aisK-cavita- tor is consistent with the empirical formulas. The problem of numerical simulation on the supercavity induced by disk-cavitator with attack angle was solved. The shape feature of the supercavity mentioned above was analyzed in detail. The advantage and disadvantage of disk-cavitators with and without at?tack angle were summarized. The study provides the basis for shape optimization of supercavity and drag reduction.