关键词: 内流场+;渗透壁+;注入;燃面减退+

Abstract: The mean flow fields in fore combustion chamber of solid rocket motors with grain regression were studied.Based on incompressible N-S equation of two-dimensional axisymmetric flow,the analytical method,which includes not only simplified N-S equation by spatial similarity and temporal similarity but also solving the high order equation by perturbation method,was introduced.With the technology of dynamic mesh in FLUENT software,the mean flow fields were numerically simulated by solving N-S equation.The velocity fields,pressure fields and shear stress distributions were mainly studied for different rates of wall regression and injection Reynolds number.The fact that numerical results are well in agreement with the analytical solutions gains confidence in the analytical approximation.

Key words: Mean flow fields+;Porous wall+;Injection;Wall regression+