摘要
发动机处于推力矢量的工作状态时,二次流引气和喷射均会对发动机的部件匹配和性能产生影响。将气动矢量喷管置于发动机环境下,综合考虑了从风扇/高压压气机引出二次流,及二次流在喷管扩张段与主流的掺混等过程对发动机性能的影响。基于发动机部件匹配技术及CFD技术,对二次流对发动机性能的影响进行了数值模拟。结果表明:选取风扇或高压压气机引气实现气动矢量喷管,均会使发动机性能有较大幅度的下降;在满足二次流压力需求的前提下,宜采用风扇引气作为二次流气源。
When the Fluidic Thrust Vector （FTV） nozzle of the aero-engine works, the bleeding and injection of the secondary flow both have an impact on the component-matching and engine performance. To study the effect of FTV nozzle on the aero-engine performance, the processes that air bleeds from fan/high pressure compressor （HPC） and that the air injects into the nozzle expansion section were considered. Based on the aero- engine component-matching and CFD technology, the influence of secondary flow on aer- o-engine performance was simulated. The results show that the performance of the engine decreases observ- ably whether the secondary flow bleeds from fan or HPC. The secondary flow bleeding from fan is more suit- able for FTV nozzle, when its pressure can meet the requirements.
出处
《推进技术》
EI
CAS
CSCD
北大核心
2013年第1期3-7,共5页
Journal of Propulsion Technology
基金
国家自然科学基金(51176156)
教育部博士点基金(20106102110025)
关键词
航空发动机
气动矢量喷管
数值模拟
二次流位置
Aero engine
Fluidic thrust vector
Numerical simulation
Secondary injection position
