斜爆震波发动机的性能仿真  

Performance Simulation of Oblique Detonation Wave Engine

作　　者：叶斌[1] 范玮[1] 严传俊[1] 

机构地区：[1]西北工业大学动力与能源学院,陕西西安710072

出　　处：《计算机仿真》2008年第7期66-69,共4页Computer Simulation

基　　金：国家自然科学基金项目(50106012;50336030);教育部新世纪优秀人才计划资助(NCET-04-0960)

摘　　要：介绍了斜爆震波发动机性能仿真的数学模型,基于Fortran语言和量热非完美气体的假设,完成了斜爆震波发动机在给定飞行条件下的性能仿真,同时分析了斜爆震波发动机欠驱动和过驱动两种模态,并获得了发动机的点火范围以及不同来流对发动机工作模态和性能的影响,结果表明,模型在全点火范围内准确可靠的实现了性能仿真。当给定来流,比冲值随激波楔角的增加,先增加后降低;随斜爆震波楔角的增加,经过比冲不变的欠驱动工作模态后进入比冲下降的过驱动模态。而随着来流马赫数的增加,由于CJ状态对应的斜爆震波楔角不断减小,发动机最佳工作范围变窄,为达到最佳性能,发动机应在欠驱动模态下工作。A mathematical model of performance simulation for oblique detonation wave engine（ODWE） was introduced.Based on computer language Fortran and the assumption of calorically imperfect gas,the performance simulation of ODWE under given flight condition was obtained.The underdriven and overdriven modes were analyzed,and the ignition window and the effect of different coming flow on the performance of ODWE were also included.It indicates that the mathematical model is reliable in all ignition window.When coming flow is given,specific impulse increases and then decreases with the shock wedge angle increasing,and specific impulse keeps constant in the underdriven mode and then decreases in the overdriven mode with the oblique detonation wedge angle increasing.As Mach number of coming flow increases,the optimum operation window becomes narrow for the corresponding CJ wedge angle decrease.It suggests that ODWE should operate in the underdriven mode to achieve optimum performance.

关 键 词：斜爆震波 欠驱动 量热非完美气体 仿真 

分 类 号：V271.4[航空宇航科学与技术—飞行器设计]