论文部分内容阅读
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%。
In order to analyze the energy conversion efficiency of laser propulsion of gas-liquid two-phase working fluid, an ideal dynamic cycling model of laser propulsion of gas-liquid two-phase working fluid is established and the influencing factors of energy conversion efficiency are studied. The results show that the press ratio and the constant volume supercharge ratio are the main factors that affect the energy conversion efficiency. Increasing the ratio of the press ratio or the constant volume press ratio can effectively improve the energy conversion efficiency. The press ratio increases with the increase of the inlet Mach number Large, and constant volume pressurization ratio with the laser power density or the working fluid droplets and air mass ratio increases. Increasing the mass ratio of water droplets to air in working fluid can effectively increase the constant pressure ratio and improve the energy conversion efficiency. According to an example, when the pressure ratio π = 10, the mass ratio f of water droplets to air increases from 0 By 10, the energy conversion efficiency ηt increased from 52.5% to 55.8%.