某发动机压缩系统喘振与消喘控制的模拟分析

Modeling surge and recovery of the axial compression system in a turbine engine

关键词:  压气机  喘振  失速  气动稳定性  数值仿真

Key words:  Compressor  Surge  Stalling  Aerodynamic stability  Numerical simulation

摘要:

应用逐级动态压缩系统模拟技术 ,对某型发动机核心压气机系统的过失速 喘振行为进行了模拟分析 ,发展了相应的控制主燃烧室切油速率的消除喘振方法。结果表明 ,主燃烧室切油速率是实施喘振消除的关键 ,但伴随着压缩系统喘振的消除 ,发动机涡轮进口总温迅速下降 ,这将对发动机性能产生不利影响。

Abstract:

A digital computer model was given to simulate the post stall operation of the axial compression system in a turbine engine The major engine components such as the high pressure compressor , primary combustor and turbine were modeled based on stage by stage dynamic compression system modeling technique The surge characteristics for the compression system was presented,and the recovery from the surge in the compression system was obtained using primary combustor fuel cutoff control schedule It was found that the fuel cutoff rate was the significant controlled parameter for the compression system recovery It was notable that inlet total temperature of the turbine was considerably decreased with the fuel cutoff control plan