摘要
为了了解外流对塞式喷管性能的影响 ,本文从N S方程出发 ,采用NND格式对塞式喷管有外流的流场进行了数值模拟 ,重点研究了外流马赫数和外流迎角对塞式喷管的影响。研究表明 ,在一定飞行高度下 ,外流会使塞式喷管的性能降低 ,并且外流为亚声速时对塞式喷管的影响较小 ,在跨声速和超声速时影响较大 ;当外流有迎角时 ,会改变塞式喷管推力矢量 ,正迎角会使塞式喷管性能得到补偿 ,负迎角则会降低塞式喷管的性能。随着背压减小 。
To understand the effect of free stream on aerospike nozzle, numerical simulations of the flow field around aerospike nozzle with free stream are completed based on N S equations with NND scheme. The attention is paid to free stream Mach and the angle of attack effect on aerospike nozzle. It shows that, under some flight altitude, free stream lessen aerospike nozzle performance, and a subsonic free stream changes slightly the performance of aerospike nozzle compared with the transonic and supersonic free stream. The angle of attack of free stream changes the thrust vector of aerospike nozzle. The positive angle of attack increases the aerospike nozzle performance, but negative one makes it loss. The free stream effect on aerospike nozzle becomes smaller with backpressure decreasing.
出处
《空气动力学学报》
CSCD
北大核心
2002年第1期40-47,共8页
Acta Aerodynamica Sinica
基金
国家 8 6 3 2高技术航天领域资助项目 ( 86 3 2 3 4 10 )
国家自然科学基金资助项目 ( 59786 0 0 1)
