中文摘要：

为了分析气液两相工质激光推进的能量转换效率,建立了气液两相工质激光推进的理想动力循环模型,对能量转换效率的影响因素进行了研究。结果表明,冲压比和定容增压比是影响能量转换效率提高的主要因素,增大冲压比或定容增压比都能有效提高能量转换效率,冲压比随进口马赫数的增大而增大,而定容增压比随激光功率密度或工质中水滴与空气质量比的增大而增大。增大工质中水滴与空气的质量比能够有效增大定容增压比,提高能量转换效率,据算例可得,当冲压比π=10,水滴与空气的质量比f由0增大到10时,能量转换效率ηt由52.5%提高到了55.8%。

英文摘要：

For the analysis of the energy conversion efficiency of laser propulsion with gas-liquid two phase propellant,an ideal cycle model for laser propulsion with gas-liquid two phase propellant is established,and the factors of energy conversion efficiency are analyzed. The results show that the ram pressure ratio and the constant volume compression ratio are the main factors of energy conversion efficiency. The increasing of ram pressure ratio or constant volume compression ratio can improve the energy conversion efficiency. The ram pressure ratio increases with increasing inlet Mach number,and the constant volume compression ratio increases with the increase of laser power density or mass ratio of water to gas. The increasing of mass ratio of water to gas can increase the constant volume compression ratio and then improve the energy conversion efficiency effectively. When the ram pressure ratio π=10 and the mass ratio of water to gas increases from f=0 to f=10,the energy conversion efficiency increases from ηt=52.5% to ηt=55.8%.