关键词: 航空工程, 弹射救生系统, 数值模拟, 混合网格, Navier-Stokes方程

Abstract: Based on Jameson’s finite volume method, an Euler equation solver with high precision hybrid grid is developed to calculate the aerodynamic characteristics of ejection escape system with complex, non-regular and non-streamline shape. An N-S equation solver with S-A turbulence model based on Euler equation solver is also developed in the paper. Several speeding convergence measures make the solution more reliable. The computation result for ejection seat system at large angle of attack is in good accordance with the wind tunnel test result. It can help to analyze the aerodynamic characteristics of ejection seat system by Mach number distribution, pressure distribution and so on. The numerical simulation can be the reasonable complement of wind tunnel test.

Key words: aerospace engineering, ejection escape system, numerical simulation, hybrid grid, Navier-Stokes equation