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《Journal of Zhejiang University(Engineering Science)》 2018-05
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Rubbing process of aero-engine blades considering seal coating

ZHANG Jun-hong;WANG Jie;LU Xin;DAI Hu-wei;MA Liang;State Key Laboratory of Engine,Tianjin University;Ren'ai College,Tianjin University;  
The rubbing process between the blade and the coating/casing were analyzed through simulation and experiment approaches in order to analyze the effect of the seal coating on the rubbing process of aeroengine compressor blades.The dynamic model of blade-coating/casing rubbing was developed.The blade tip stress and the rubbing force under a certain speed with various invasion depths were obtained.The blade-coating/casing rubbing test bench was built and the rubbing force and the acceleration of the casing under the same speed were measured.Comparisons between the blade-casing rubbing and the blade-coated casing rubbing were conducted.Results show that the seal coating effectively reduces the blade tip stress,the rubbing force and the casing vibration acceleration amplitude at the peak frequency.The rubbing force is periodically pulsive and the magnitude increases nonlinearly with increasing invasion depth.The peak frequencies of the casing vibration are the blade-passing frequency and harmonics.The acceleration amplitudes under peak frequencies increase,with the increase of invasion depth and the acceleration amplitudes under high frequencies grow significantly.
【Fund】: 国家自然科学基金资助项目(51501222);; 中国民航局重大专项资助项目(MHRD20160106)
【CateGory Index】: V231.9
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