物体自由入水的多参数影响分析

To study the effect of parameters such as the water entry speed and deadrise angle on the slamming of free water entry object, two numerical models that can perform mutual verification were developed based on STAR-CCM+ and Fluent, combined with technologies such as mesh reconstruction technology, overset grid technology, and VOF interface capture technology. The free water entry processes of two-dimensional wedges were compared and analyzed. First, the grid convergence was verified, and different coupling algorithms of velocity and pressure were compared and analyzed. Second, the accuracy of the numerical method was verified by comparing the results of the two CFD calculation models with published experimental results. Finally, the free water entry processes of wedges with different parameters such as water entry velocities and deadrise angles were simulated, and their influences on physical quantities such as pressure, velocity, and flow field were analyzed. The results show that the smaller the deadrise angle and the higher the speed of the wedge, the greater the extreme value of the slamming force generated during the water entry process and the earlier the extreme value occurs. In summary, two numerical models of free water entry slamming were established in this paper, and they were mutually verified. The simulation results show that the numerical model established here can accurately simulate the free water entry slamming problem and provide technical support for the later study of water entry slamming problem, which considers elastic deformation.