气动状态对涡轮叶片激振力与振动的影响  

Effect of Aerodynamic State on Excitation Force and Vibration of the Turbine Blade

作　　者：刘日晨 陈云 王鹏 LIU Richen;CHEN Yun;WANG Peng(AECC Shenyang Engine Research Institute,Shenyang 110015,China)

机构地区：[1]中国航发沈阳发动机研究所,沈阳110015

出　　处：《动力工程学报》2024年第11期1797-1803,共7页Journal of Chinese Society of Power Engineering

基　　金：重大专项基础研究资助项目(J2019-II-0011-0031)。

摘　　要：以某型存在高周疲劳失效现象的涡轮为仿真模型,采用涡轮三维非定常流场与固体振动响应分析耦合的计算方法,开展故障状态点的仿真。针对不同的涡轮膨胀比和涡轮反力度工况,对比分析了气动状态发生变化后动叶负荷分布和气动激振力的变化规律,以及叶片振动应力的相对变化趋势。结果表明:在进气工况不变的情况下,随着涡轮工作膨胀比的增大,叶片平均激振力、激振力幅值和振动应力呈明显增大趋势;随着涡轮反力度的增大,叶片平均气动激振力明显增大,但对应的激振力幅值和振动应力呈下降趋势。A turbine with high cycle fatigue failure was used as the simulation model,the coupling method of three-dimensional unsteady flow field and solid vibration response analysis was adopted,the simulation of fault point was carried out.According to the different conditions of turbine expansion ratio and turbine reaction force,the law of aerodynamic load distribution and aerodynamic exciting force caused by aerodynamic state change was compared,at the same time,the relative variation trend of blade vibration stress was obtained.Results show that under unchanged intake conditions,the average exciting force,the amplitude of exciting force and the vibration stress of the blade increase obviously with the increase of the expansion ratio of the turbine.While the turbine reaction force increases,the average aerodynamic exciting force of the blade increases obviously,but the amplitude of the exciting force and the vibration stress have a downward trend.

关 键 词：气动性能 叶片激振力 振动响应 膨胀比 涡轮反力度 

分 类 号：V231[航空宇航科学与技术—航空宇航推进理论与工程]