摘要
建立了双外涵变循环发动机(VCE)总体性能数学模型,实现了变循环发动机与进气道进口流量匹配、双参数控制规律、可变几何部件性能模拟。依据单/双涵道模式、最大推力/最小耗油率模式、是/否开加力选取了起飞、亚声速巡航、超声速巡航、加速爬升4个典型航段,分析了变循环发动机10个几何可调节变量在不同飞行条件下的控制规律及其对发动机安装性能和稳定性的影响。结果表明,相比于几何不可调节变循环发动机,几何可调节的变循环发动机在亚声速和超声速巡航阶段的安装耗油率可分别降低3%和30%,加速爬升阶段的安装推力可增加42%,并且保证发动机均能具有足够的喘振裕度。
A mathematical model is established for calculating double bypass variable cycle engine （VCE） performance,which achieves engine/inlet mass flow matching and realizes dual parameter control law and the simulation of variable geometry components performance.Variable cycle engine can work in single or double bypass mode,under the conditions of maximum thrust or minimum fuel consumption,with or without afterburning.According to the engine operation,four typical flight conditions including takeoff,subsonic cruise,supersonic cruise,acceleration and climb are chosen.The control law of ten adjustable geometry parameters and their influence on variable cycle engine＇s installed performance and stability are analyzed of each flight.The results indicate that compared with fixed geometry variable cycle engine,the installed specific fuel consumption of variable geometry variable cycle engine decreases by 3％ and 30％ in subsonic and supersonic cruise respectively,meanwhile the installed thrust increases by 42％ in acceleration and climb,and sufficient surge margin of engine can be ensured.
出处
《航空学报》
EI
CAS
CSCD
北大核心
2014年第8期2126-2135,共10页
Acta Aeronautica et Astronautica Sinica
基金
国家自然科学基金(51176156
51306151)~~
关键词
变循环发动机
可变几何
控制规律
流量匹配
安装性能
稳定性
variable cycle engine
variable geometry
control law
mass flow matching
installed performance
stability
