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刷式密封摩擦生热温度场数值计算及试验

Numerical calculation and experiment on temperature field of friction heat generation of brush seal
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摘要 在摩擦热热源条件下建立了CFD多孔介质数值计算模型,对某型航空发动机刷式密封摩擦生热温度场进行计算分析,开展了刷式密封装置全工况条件下摩擦生热试验研究,采用红外成像技术实现了刷式密封动态温度场实时监测。根据试验结果对摩擦生热温度场计算方法进行了修正,引入了刚度修正系数,并对刚度修正系数进行了确定及验证。总结出经过试验验证的航空发动机刷式密封摩擦生热温度场计算分析及试验方法,结果表明:与全工况试验结果相比,计算误差值从48.15%减少到10.67%。 A numerical calculation model with CFD porous media with friction heat as heat source was built.The temperature field of friction heat generation of brush seal used in a specific aero engine was analyzed.An experimental study of friction heat generation in brush seal with simulating operating conditions was conducted.A kind of technology using infrared camera was developed to get the real-time dynamic temperature field of brush seal.Experimental data was used to analyze and improve the numerical calculation model of heat generation.Based on these results,a stiffness correction factor was introduced and validated.During this study,a kind of calculation and experimental method validated by the experimental data was summarized,and could be used to analyze the temperature field of heat generation of brush seal in aero engine.Result showed that,by utilizing such methods,the error between calculation result and experimental data from simulated real operating conditions reduced from 48.15%to 10.67%.
作者 吴施志 江平 力宁 潘君 王智加 WU Shizhi;JIANG Ping;LI Ning;PAN Jun;WANG Zhijia(Hunan Aviation Powerplant Research Institute,Aero Engine Corporation of China,Zhuzhou Hunan 412002,China;Science and Technology on Helicopter Transmission Laboratory,Aero Engine Corporation of China,Zhuzhou Hunan 412002,China)
出处 《航空动力学报》 EI CAS CSCD 北大核心 2019年第4期737-743,共7页 Journal of Aerospace Power
关键词 刷式密封 摩擦热 热流密度 刷丝刚度 红外成像 brush seal friction heat heat flux bristle stiffness infrared imaging
作者简介 吴施志(1963-),男,研究员,硕士,主要研究方向为航空发动机设计与试验;通讯作者:力宁(1967-),男,研究员,硕士,主要研究方向为航空发动机密封设计与试验。E-mail:lining-608@163.com.
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