摘要
航空发动机压气机转子叶尖径向间隙设计需保证间隙最小,且不发生碰磨。结合压气机转子叶尖径向间隙有限元仿真和测量结果,研究了压气机转子叶尖径向间隙的变化规律,确定了叶尖径向间隙最小、容易发生压气机转子叶尖径向整圈碰磨的典型过渡态历程,即当压气机出现近似“冷机匣、热转子”时快速上推到大状态(中间或最大状态),或发动机进口降温等典型过渡态过程;同时,确定了叶尖间隙最大的典型过渡态过程,即当压气机出现近似“热机匣、冷转子”时快速下拉到慢车状态,或发动机进口升温等典型过渡态过程。为避免发动机正常工作中发生压气机转子叶尖与涂层径向整圈碰磨,提出了适用于发动机仿真分析用的加、减速过渡态程序,可供工程设计参考。
The radial clearance design of aero-engine compressor blade tip needs to ensure the minimum clearance and no rubbing.Based on the finite element simulation and measurement of radial clearance of a compressor,the variation law of the radial tip clearance was studied.As a result,the typical transient state process of minimum radial tip clearance and more likely rubbing in the radial whole circle was determined,i.e.pushing up to the large state(intermediate or maximum state)rapidly or cooling engine inlet while the compressor appears the approximate"cold case and hot rotor".On the other hand,pulling down to the small state quickly or heating engine inlet when the compressor arises"hot case and cold rotor"can get the maximum tip clearance.In order to avoid collision between the tip and the coating in the normal operation of the engine,a transient state program of acceleration and deceleration for the theoretical calculation of the engine was proposed,which could be used as a reference for engineering design.
作者
庞燕龙
秦仕勇
陈妍妍
孙海鹤
周大庆
曾瑶
PANG Yan-long;QIN Shi-yong;CHEN Yan-yan;SUN Hai-he;ZHOU Da-qing;ZENG Yao(AECC Sichuan Gas Turbine Establishment,Chengdu 610500,China)
出处
《燃气涡轮试验与研究》
2022年第5期27-32,共6页
Gas Turbine Experiment and Research
关键词
航空发动机
叶尖间隙
压气机
过渡态
碰磨
aero-engine
tip clearance
compressor
transient state
rubbing
作者简介
庞燕龙(1984-),男,山西太原人,高级工程师,主要从事航空发动机结构、强度设计工作。
