塞式喷管流场变化对性能的影响  

THE EFFECT OF FLOW FIELD CHANGING ON LINEAR PLUG NOZZLE

作　　者：戴梧叶[1] 刘宇[1] 张正科[1] 覃粒子[1] 王一白[1] 

机构地区：[1]北京航空航天大学宇航学院,北京100083

出　　处：《宇航学报》2001年第4期20-26,共7页Journal of Astronautics

基　　金：国家 8 63-2高技术航天领域 [863-2 -3-4 -1 0 ];国家自然科学基金资助项目 [597860 0 1 ]

摘　　要：为了更清楚塞式喷管的流动机理以便合理的设计塞式喷管 ,本文从 N- S方程出发 ,采用 NND格式对塞式喷管的流场进行了数值模拟。重点研究了塞式喷管在高低空流场的发展和外流对塞锥流场及其性能的影响 .研究表明 ,在设计高度以下 ,塞式喷管的高度补偿作用很大 ,并且外流对塞式喷管影响很大 ;而在设计高度以上 ,塞式喷管的补偿作用消失 ,而外流的影响同样可以忽视。To understand the flow field structure around plug nozzle and to develop appropriate methodology for designing plug nozzle contour,numerical simulations of the flow field around linear plug nozzle were performed.The numerical simulations were completed based on N S equations with NND scheme.It indicates that the altitude compensation for plug nozzle is very strong and that the free stream changes the flow field very much when aerospike nozzle is under some altitude.However,when the flight altitude is higher than the design altitude,the altitude compensation disappears and the effect of free stream on aerospike nozzle can be ignored.

关 键 词：火箭发动机 数值模拟 塞式喷管 外流干扰 流场变化 性能 

分 类 号：V430[航空宇航科学与技术—航空宇航推进理论与工程]