入射条件对射弹入水跳弹行为的影响研究

Research on the Influence of Incident Conditions on Ricochet Behavior During Water-Entry Process

为研究潜-飞两栖导弹和水下兵器在不同入水初始条件下的跳弹行为,利用ANSYSCFX软件构建数值计算模型,分别以入射角度和入水速度为变量,对细长体射弹的入水跳弹行为进行数值模拟.研究结果表明:射弹的入水跳弹行为可分为撞击阶段、侵水阶段和出水阶段等3个阶段;入水初始速度越大,射弹越容易发生跳弹行为,且发生跳弹的速度越快,而较小的初始速度不足以提供使射弹跳出水的动能;射弹的入射角度越小,其轨迹越易向上发生弯曲,越容易出现跳弹行为.

In order to study the ricochet behavior of air-water crossing vehicle and underwater ordnance at different incident conditions, the numerical simulation model using ANSYS CFX software is built by changing the incident velocity and angle. The research results show that: the ricochet behavior can be divided into three stages: impacting, water-entry and water-out;a greater incident velocity makes the ricochet behavior more easy and quick occur, and a smaller velocity is not enough to provide kinetic energy to the velocity to leave the water;a smaller incident angle makes the trajectory upward and even ricochet, causing the underwater movement deviating from the extension of air trajectory. The conclusion can provide a reference for the underwater ordnance and air-water crossing vehicle.