导弹热发射燃气射流对发射筒的影响

为研究导弹热发射过程中燃气射流对筒体的热冲击和动力冲击效应,基于三维、雷诺平均Navier-Stokes方程和RNG(renormalization-group)κ-ε湍流模型,采用域动分层法模拟导弹发射过程,得到了导弹发射过程中筒内的温度、速度、压强云图及筒壁监测点的压强和温度变化曲线。结果表明:发射筒前后盖打开以后,筒内燃气无反射回流现象;导弹发射过程中,筒内的高压燃气向外压迫筒壁,使筒体产生最大变形为0.68 mm;发射筒在最大温度载荷作用下产生的热变形为0.1 mm。

The Effect of Missile Thermal Emission Gas Jet on the Launch Tube

In order to study the thermal shock and dynamic shock effects of gas jet on the cylinder during the thermal launch of the missile, based on the three-dimensional, Reynolds average NS equation and RNG turbulence model, the domain launching process is used to simulate the missile launch process, and the missile launch process is obtained. Temperature, velocity, pressure cloud map and pressure and temperature curves of the monitoring point in the cylinder. The results show that after the front and rear covers of the launching tube are opened, there is no reflection and backflow of gas in the cylinder. During the missile launching process, the high-pressure gas in the cylinder presses the cylinder wall outward, so that the maximum deformation of the cylinder is 0.68mm; the maximum temperature load of the launching cylinder The thermal deformation generated under the action is 0.1 mm.