高超声速飞行器热防护的布雷顿热电转化技术

针对高超声速飞行器面临的热防护问题，提出了一种布雷顿循环热电转化技术，结合高超声速飞行器的飞行工况，进行了热力学计算，初步得到热电转化的发电效率及发电机功率，并讨论了飞行马赫数、关键部件效率、压比和循环工质对系统性能（发电效率和输出功率）的影响。结果表明，气动热的利用使高超声速飞行器的热电转化成为可能；同时提高关键部件效率，如换热器效率、旋转部件效率可提高发电效率和发电机功率，由于它们之间存在耦合关系，在系统方案设计时需要综合考虑；分析也表明，选择适当的工质可以提高热电转化的发电效率及发电机功率。

Analysis of Brayton Thermoelectric Conversion Method for Thermal Protection of Hypersonic Aircraft

A brayton thermoelectric conversion method which introduced to thermal protection of hyper- sonic aircraft is proposed. The efficiency of electric power generation and the power of generator are pre- liminarily calculated by taking into account the flight condition of hypersonic aircraft. Moreover, the in- fluences between key parameters of the system and its performance are analyzed. Herein, the key param- eters of system include flight Mach number, the efficiency of key components, pressure ratio of the com- pressor and three different working fluids, and the system performance just consider the power generation efficiency and output power. Results show that it is possible to conserve the hypersonic aircraft＇ s aerody- namic heat to electric power. Furthermore, the system performance increases with the increasing of key parameters.