Dynamic performance of a C/C composite finger seal in a tilting mode |
| |
Authors: | Hailin ZHAO Guoding CHEN Lina WANG Hua SU Fei LU |
| |
Institution: | School of Mechanical Engineering, Northwestern Polytechnical University, Xi'an 710072, China |
| |
Abstract: | The complex operating state of aeroengines has an impact on the performance of finger seals.However,little work has been focused on the issue and the dynamic performance of finger seals is also rarely studied.Therefore,a distributed mass equivalent model considering working conditions is proposed in this paper for solving the existing problems.The effects of the fiber bundle density and the preparation direction of the fiber bundle of a C/C composite on the dynamic performance of a finger seal are investigated in rotor tilt based on the proposed model.The difference between the C/C composite finger seal performances under the rotor precession and nutation tilt cases is also investigated.The results show that the fiber bundle density and the preparation direction of the fiber bundle have an influence on the dynamic performance of the finger seal as rotor tilt is considered,and the dynamic performance of the finger seal is different in the two kinds of tilting modes.In addition,a novel method for design of finger seals is presented based on the contact pressure between finger boots and the rotor.Finger seals with good leakage rates and low wear can be acquired in this method. |
| |
Keywords: | Aero-engine C/C composite Dynamic performance Finger seal Nutation tilt Precession tilt |
本文献已被 CNKI 万方数据 等数据库收录! |
|