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大气呼吸模式激光推进的比冲和冲量耦合系数受制于其能量转换效率,对能量转换效率进行分析具有重要意义。建立了大气呼吸模式激光推进的理想动力循环模型,分析了激光推进过程中的能量转换效率,并探讨了提高能量转换效率的可行途径。研究结果表明,增大冲压比或定容增压比是提高能量转换效率的有效途径,其中增大飞行速度能有效增大冲压比,提高激光功率密度和改变工质掺杂特性能有效增大定容增压比。掺入水滴杂质形成的气液两相工质在激光推进领域具有较好的发展前景。
The specific impulse and impulse coupling coefficient of atmospheric respiration mode laser propulsion are controlled by its energy conversion efficiency, and it is of great significance to analyze the energy conversion efficiency. An ideal dynamic cycling model of atmospheric breathing mode laser propulsion was established. The energy conversion efficiency in the process of laser propulsion was analyzed, and the possible ways to improve the energy conversion efficiency were discussed. The results show that increasing the ramification ratio or constant volume supercharging ratio is an effective way to improve the energy conversion efficiency. Increasing the flight speed can effectively increase the ramification ratio, increase the laser power density and change the working fluid doping characteristics effectively Constant volume pressurization ratio. The gas-liquid two-phase working fluid formed by mixing water droplets has better development prospects in the field of laser propulsion.