MHD能量旁路超燃冲压发动机可行性分析  

Feasibility study of MHD energy bypass scramjet

作　　者：郑小梅[1] 徐大军[1] 蔡国飙[1] 

机构地区：[1]北京航空航天大学宇航学院,北京100191

出　　处：《北京航空航天大学学报》2009年第3期272-275,295,共5页Journal of Beijing University of Aeronautics and Astronautics

基　　金：国家"863"高技术发展计划资助项目(2005AA721081)

摘　　要：使用准一维模型对磁流体能量旁路超燃冲压发动机MPCE(Magneto-Plasma-Chem ical Engine)进行了性能计算.考察了理想和非理想的超燃冲压发动机应用磁流体MHD(magnetohydrodynam ics)能量旁路的效果,对于理想的超燃冲压发动机应用MHD反而会使发动机的性能降低;对于非理想的超燃冲压发动机,MHD的作用使发动机的比冲增加.考虑发动机工作的工程限制条件对超燃冲压发动机和MPCE的性能进行了比较,结果表明应用MHD可以扩大超燃冲压发动机的工作范围,在非设计马赫数下提高发动机的性能.计算了负载系数、通道压力系数等重要的设计参数对MPCE性能的影响,结果显示优化参数设置可以使发动机比冲增加,但是同时又会受到工程条件的限制.The performance of magnetohydrodynamics（MHD） energy bypass scramjet was analyzed using quasi-one dimensional mathematical model. MHD application on ideal and un-ideal scramjet was investigated, the results show that for ideal scramjet there is no need to use MHD devices, for un-ideal scramjet the performance can be improved by the use of MHD energy bypass. Considering about the engineering constraints, such as combustion chamber entry Mach number and the maximum allowable temperature of the entire channel, the performance of scramjet and magneto-plasma-chemical（MPCE） was compared, results show that MHD energy bypass can broaden the flight Mach number range of the engine and improve performance when the vehicle is flying at un-design Mach number or the engine is not perfectly designed. The influence of some important parameters such as load factors and MHD channel pressure coefficients to the performance of the MPCE was analyzed, results show that the optimization of these parameters can increase the specific impulse of the engine but the degree is constrained by the engineering conditions.

关 键 词：磁流体动力学 磁流体能量旁路超燃冲压发动机 高超声速飞行器 超燃冲压发动机 

分 类 号：V590[航空宇航科学技术]