超高速弹丸气动热的数值模拟

Numerical Simulation of Aerodynamic Heat of Hypersonic Projectile

为准确预测超高声速弹丸表面气动热及弹体内部温度和装药温度分布,在贴加一层防热材料的情况下,开展高超声速流场和结构温度场的耦合换热数值模拟,通过流固耦合交界面实现不同相间的热传递。计算得到了各个时刻弹丸表面温度以及弹丸内部和装药的温度变化。研究表明,采用流固耦合方法模拟气动热问题,可以得到较为合理及实用的弹丸温度数据。

In order to accurately predict the exoteric aerodynamic heat and internal temperature of a hypersonic projectile and the charge temperature distribution, a numerical simulation of coupled heat transfer of hyper sonic flow field and structure temperature field was carried out when a layer of thermal protection material was added. The heat transfer between different phases was realized by fluid-solid coupling in- terface. Projectile surface temperature and the temperature variation of internal projectile and charge at each moment were calculated. The results showed that the fluid-solid coupling method was adopted to simulate the aerodynamic heat for more reasonable and practical projectile temperature, data.