Effect of adiabatic inhibitor on afterward-dome insulation ablation in segmented solid rocket motors

The ablation effect of adiabatic inhibitor on afterward-dome insulation was discussed systematically under combustion chamber operating condition for a typical SSRM(segmented solid rocket motor).Both numerical simulation results and tested data show that the existence of adiabatic inhibitor accelerate the gas flow speed to a certain extent, which result in two phase flow gas concentration and speed enhanced in certain scope of afterward-dome of combustion chamber, and make the ablation quantity of afterward-dome increased significantly. Furthermore, with the numerical analysis of modified SSRM, the result of this investigation is to provide the motor design characteristics and the system engineering approach used to effectively suppress the insulation ablation of afterward-dome for SSRMs.