【摘要】 本文用MAC方法模拟平头物体垂直等速入水空泡发展的全过程,用有限差分法直接解N-S方程,用标记质点显示液面位置和空泡形状,不必先假定空泡形状,自由面上的运动学条件和动力学条件自然得到满足。数值计算给出了空泡发展的过程,包括分离、开空泡、深闭合和闭合后的射流,还给出了物面上的压力分布和阻力系数。更多还原

【Abstract】 This paper attempts to simulate numerically the complete process of development of the water-entry cavity using the MAC technique in which the Na-vier-Stokes equation is solved by means of the finite difference method and the surface of water and the cavity shape is determined by the so-called marker particles, making it unnecessary to assume the cavity shape a priori. The kine?matical aad dynamic condition on free surface are satisfied easily. The process of development of the cavity including that of separation, open cavity phase, deep closure and jet after closure is shown in figures. The pressure distribution and drag coefficient are also included.更多还原