Performance Analysis of the C/C Composite Cylindrical Reverse Inter-Shaft Gas Film Seal

The reverse inter-shaft gas film seal is a path used in the intermediate bearing cavity of an aero-engine, which challenging to implement due its special installation and usage conditions. This paper proposes C/C (Carbon/Carbon) composite cylindrical structure carries out performance simulation analysis based on bidirectional fluid–solid coupling technology. results show that with double-layer sealing rings different material mesoscopic parameters can balance leakage friction power consumption beneficial improving comprehensive seal. As inner ring increase warp weft density, rate decreases, force all increase. pressure difference increases, rotation speed outer rotors decreases. A has lower larger than graphite seal, confers certain advantages. work this provide reference for design seals.