Dynamic analysis of C/C composite finger seal

作     者：Chen Guoding Wang Li’na Yu Qiangpeng Su Hua 

作者机构：School of Mechanical Engineering Northwestern Polytechnical University AVIC Commercial Aircraft Engine Co. Ltd 

出 版 物：《Chinese Journal of Aeronautics》 (中国航空学报（英文版）)

年 卷 期：2014年第27卷第3期

页      面：745-758页

核心收录：

学科分类：082502[工学-航空宇航推进理论与工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0825[工学-航空宇航科学与技术] 

基　　金：supported by the National Natural Science Foundation of China (No. 50575182) the Natural Science Foundation of Shaanxi Province of China (2014JM7266) 

主　　题：Aeroengine C/C composite Co-based alloy Equivalent dynamic model Finger seal 

摘      要：A seal device as an important component of aeroengines has decisive influence on per- formance, reliability, and working life of aeroengines. With the development of aeroengines, demands on the performance characteristics of seal devices are made strictly. Finger seal as a novel kind of sealing device, recently attracts more and more attentions in academic circles and engineer- ing fields at home and abroad. Research on finger seals has been extensively developed, especially on leakage and wear performances under dynamic conditions. However, it is a pity that the work on finger seals has been limited with a single approach that is improving the performance by structural optimization; in addition, the technology of dynamic analysis on finger seals is weak. Aiming at the problems mentioned above, a distributed mass equivalent dynamic model of finger seals considering the coupling effect of overlaid laminates is established in the present paper, the dynamic perfor- mance of 2.5 dimension C/C composite finger seal is analyzed with the model, and then the effects of fiber bundle density and fiber bundle preparation direction on finger seal＇s dynamic performance are discussed, as well as compared with those of Co-based alloy finger seal. The current work is about dynamic analysis of finger seals and application of C/C composite in this paper may have much academic significance and many engineering values for improving research level of finger seal dynamics and exploring feasibility of C/C composite being used for finger seals.