Dynamic Analysis of 2.5D C/C Composites Finger Seal

For the finger seal, leakage and wear are key factors to affect its sealing performance and service life. To reduce the wear of the finger seal, C/C composites are probably used for finger seal material preparation for its self-lubrication and light weight properties compared with the metal. The work to be presented here assessed the elastic properties of the 2.5D C/C composites by the volume average method and established a finite element model for finger seal dynamic analysis. The results show that increasing warp yarn density and using shallow direct-joint structure can notably improve sealing performance of the finger seal, but can also increase contact pressure between the finger seal and the rotor.