塞式喷管底部二次流的数值模拟研究  

Numerical Investigation of Base Bleed Effect on Aerospike nozzle

作　　者：戴梧叶[1] 刘宇[1] 张正科[1] 

机构地区：[1]北京航空航天大学宇航学院,北京100083

出　　处：《航空动力学报》2002年第3期292-296,共5页Journal of Aerospace Power

基　　金：国家 8 63 -2高技术航空领域基金资助项目 (863 -2 -3 -4 -10 ) ;高等学校博士点专项科研基金资助项目 (2 0 0 0 0 0 0 619)

摘　　要：从 N-S方程出发 ,采用二阶精度的 NND格式对塞式喷管的流场进行了数值模拟 ,重点研究了一线性塞式喷管底部二次流在低中高空的特性。研究表明 ,塞式喷管底部回流区的消失不仅与二次流流量大小有关 ,而且与底部压强有关 ;加入二次流会使塞式喷管的推力上升 ,但在大多数情况下其比冲会下降 ,只有特定压强比条件下 。The numerical simulations of the flow field around aerospike nozzle were completed based on N S equations with second order NND scheme.The attention is paid to the effect of the base bleed on aerospike nozzle at sea level,middle and high altitude.The results indicate that both the quantity of bleed mass flux and the magnitude of base pressure are the causes that induce the swirl in the base area to disappear.Though the bleed can enlarge the thrust of the aerospike nozzle,it lessens the specific impulse except the case that the bleed is small at low flight altitude for the linear aerospike nozzle.

关 键 词：数值模拟 塞式喷管 火箭发动机 二次流 

分 类 号：V430[航空宇航科学与技术—航空宇航推进理论与工程]