涡扇发动机高原起动供油调整规律研究及故障分析  

Adjustment rule of fuel supply and fault analysis of turbofan engine starting on plateau

作　　者：高磊[1] GAO Lei

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：《现代机械》2024年第1期26-30,共5页Modern Machinery

摘　　要：以某型涡扇发动机高原起动试验为研究对象,通过建立关键事件方式建立起动调整策略分析方法,总结分析了高原起动特点及起动供油量的调整规律,并针对发动机起动过程中出现的几种典型的失速、热悬挂失败案例,分析获得了起动失败的原因。结果表明:高原冷态起动失败主要为起动机脱开后发动机失速为主;热态起动失败主要为低压转子阻力矩增大导致热悬挂为主;起动供油调整规律为起动第二阶段减小供油量,起动第三阶段增加供油量。并提出了提升高原起动成功率的建议,可为发动机高原使用提供参考。This paper analyzed the starting tests of a turbofan engine on plateau.The characteristics of starting on plateau and the adjustment rule of starting fuel supply were summarized and analyzed.Several typical cases of stall and thermal suspension failure in the engine starting process were analyzed,and the reasons were obtained.The conclusions were as follows:the failure of cold starting on plateau was mainly caused by engine stall after the starter disengages;the failure of hot starting on plateau was mainly caused by high resistance of low-pressure rotor and thermal suspension.The adjustment rule of starting fuel supply was reducing fuel supply in the second stage and increasing fuel supply in the third stage.Suggestions were put forward to improve the success rate of starting on plateau.This study can provide reference for the use of turbofan engine on plateau.

关 键 词：高原起动 供油规律 失速 

分 类 号：V231[航空宇航科学与技术—航空宇航推进理论与工程]