环境压强对气动塞式喷管底部压强的影响  

Influence of ambient pressure on aerospike nozzle base pressure

作　　者：李军伟[1] 刘宇[1] 

机构地区：[1]北京航空航天大学宇航学院,北京100083

出　　处：《北京航空航天大学学报》2003年第8期663-667,共5页Journal of Beijing University of Aeronautics and Astronautics

基　　金：国家 8 63高技术航天领域资助项目 (863 2 3 4 10 ) ;高等学校博士学科点专项科研基金资助项目 (2 0 0 0 0 0 0 619)

摘　　要：为了了解环境压强对塞式喷管底部压强的影响 ,利用隐式NND格式 (Non oscillation ,NofreecoefficientsDissipativescheme)求解二维层流N S方程 ,计算了在没有底部二次流和二次流质量流率为 1 .4%的情况下 ,不同环境压强时的底部压强 .结果表明 ,随着环境压强的升高 ,底部压强也在增加 ,但在闭尾迹时增加缓慢 ,在开尾迹时 ,增加迅速 。In order to understand the influence of ambient pressure on aerospike nozzle base pressure, the implicit NND (non-oscillation, no free coefficients dissipative) scheme was employed to solve the 2-D laminar N-S equations. Aerospike nozzle flow fields under different CNPR(i.e. nozzle pressure ratio) without base secondary flow and with secondary flow of 1.4% mass flux rate were obtained. The result shows that with the increase of ambient pressure, base pressure also increases. But under closed wake, the increase is slow; under open wake, the increase is rapid and even the pressure fluctuates.

关 键 词：火箭发动机 塞式喷管 底部压强 数值计算 

分 类 号：V430[航空宇航科学与技术—航空宇航推进理论与工程]