Abstract: Aiming at the application requirements of flexible gas-seal technology in aeroengine, CFD numerical analysis technique is used to analyze the sealing performance of flexible support cylindrical gas-membrane. Firstly, the seal parametric model of cylindrical gas film was established and the gas film sealing principle was analyzed. Then, based on the finite element analysis method of Linear Soid, ANSA meshing software was used to divide the mesh to obtain a non-groove cylindrical gas film Static pressure, velocity and shear stress distribution data, and analysis of cylindrical structure parameters, groove parameters and operating parameters on the flexible support cylindrical membrane sealing performance. The experimental results show that the operating parameters such as viscosity, pressure difference and rotational speed can significantly affect the sealing performance of flexible support cylindrical gas film.

Key words: flexible cylindrical gas film, CFD, seal, operating parameters, structural parameters, shear stress