摘要
为了探寻鸟撞瞬间航空发动机推力、垂向载荷的时域波形、频率的变化规律,采用时域波形分析和冲击响应谱分析方法对某发动机整机鸟撞试验过程中推力销瞬态推力和垂向载荷进行分析。通过对比分析推力与冲击力发现,鸟撞瞬间推力显著变化的主要原因是叶片攻角和流场特性的突变,并非冲击力。该规律性结论可为外物撞击发动机风扇叶片研究提供参考。
In order to explore the variation rule of time-domain waveform and frequency of the aeroengine thrust and vertical load at the moment of bird impact,transient thrust and vertical load of thrust pin were analyzed by the methods of time-domain waveform analysis and impact response spectrum analysis during bird impact test of an engine.By comparing thrust and impact force,it was found that the main reason for the significant change of thrust at the moment of bird impact was the sudden change of blade angle of attack and flow field characteristics,but not the impact force.This result can be used as a reference for the study of the foreign object damage(FOD)on the fan blade of the engine.
作者
刘涛
雷晓波
薛文鹏
LIU Tao;LEI Xiao-bo;XUE Wen-peng(Chinese Flight Test Establishment,Xi'an 710089,China)
出处
《航空发动机》
北大核心
2019年第4期53-56,共4页
Aeroengine
基金
中航工业创新基金基础类项目(2012A63033R)资助
关键词
鸟撞试验
外物损伤
推力销载荷
冲击响应谱
航空发动机
bird impact test
foreign object damage
thrust pin load
impact response spectrum
aeroengine
