吸气式激光推进中激光能量沉积过程的数值模拟

 结合辐射输运方程，在流体力学方程组的能量方程中加入包括空气吸收的激光能量以及高温气体向周围辐射损失的能量源项，转化为辐射流体力学方程组，建立了用于模拟吸气式激光推进中能量沉积过程的物理力学模型和计算方法。该辐射流体力学计算程序可以很好地模拟激光能量沉积过程中空气对激光能量的吸收、等离子体对激光的屏蔽作用以及激光维持的爆轰波的传播规律，计算得到激光能量的沉积效率约为57%，激光维持的爆轰波的传播速度与同等条件下的理论和实验结果吻合得较好。

Numerical simulation of laser energy deposition process in air-breathing laser propulsion

Combined with radiation transport equation, with energy source terms including laser energy absorbed by air and loss energy irradiated by high-temperature gas added to the energy equation of fluid dynamics equations set, the physical/mechanical model and computational method of laser energy deposition process in air-breathing laser propulsion are established. The phenomenon of air absorbing laser energy, the effect of plasma shielding laser and the propagation law of laser supported detonation wave can be simulated correctly by the radiation fluid dynamics computational code. The results indicate that the laser energy deposition efficiency is about 57%, and the velocity of laser supported detonation wave agrees well with the results of theory and experiment under similar conditions.