高超声速飞行器热防护的布雷顿热电转化技术  

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

作　　者：马喆[1] 张兴娟[1] 杨春信[1] 

机构地区：[1]北京航空航天大学航空科学与工程学院,北京100191

出　　处：《战术导弹技术》2014年第4期20-25,共6页Tactical Missile Technology

基　　金：航天支撑基金资助

摘　　要：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。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.

关 键 词：高超声速热防护 布雷顿循环 热电转化效率 

分 类 号：V19[航空宇航科学与技术—人机与环境工程]