采用排除法分析航空发动机喘振故障  

Analysis of Surge Fault of an Aero Engine with Exclusive Method

作　　者：符小刚[1] 许艳芝[1] 

机构地区：[1]中国飞行试验研究院发动机所,陕西西安710089

出　　处：《工程与试验》2015年第4期31-34,共4页Engineering and Test

摘　　要：分析了航空发动机在飞行中出现的一次喘振故障现象及其所执行的消喘程序。采用排除法,依次比较了喘振发生时发动机本体各部分的工作过程以及进排气条件,筛选出了可能的致喘因素。结果表明,超音速飞行过程中,进气道喉道剧烈的放大动作引起的发动机进气扰动以及被试发动机个体较小的稳定工作裕度共同造成了此次喘振故障。另外,提出了相应的改善措施。Phenomenon of an aero engine surge in flight test and the process of surge elimination are analyzed in this paper. With an exclusive method, the working process of each part of the engine and the intake/exhaust conditions during surge are compared and factors which would possibly induce surge are found out. The result indicates that both the air turbulence at engine inlet induced by the violently amplifying action of inlet throat and lower stability margin of the individual tested engine together lead to the surge fault. Besides, the corresponding improving step is proposed.

关 键 词：喘振 消喘 亚临界状态 激波 压气机导向叶片 

分 类 号：V233.95[航空宇航科学与技术—航空宇航推进理论与工程]