关键词: 固体推进剂火箭发动机;湍流模型;热辐射;努珊数;数值仿真;装药

Abstract: Standard k-ε turbulence model and discrete transfer radiation model(DTRM) were employed to investigate the flow-field and heat transfer in the frontal annular slot of the cone-column grain for different Reynolds number.The heat transfer between different walls of the slot and the hot gas were compared.Also the variation of Nusselt number along the surface of the annular slot was analyzed.It is indicated that Reynolds number influences the number of vortex and the distribution of vortex zone in the annular slot.Then this affects the temperature distribution in the slot.Finally it influences the heat transfer between the grain surface and the igniting gas flow in the annular slot.The results can be a helpful reference for design and analysis of grain.

Key words: Solid propellant rocket engine;Turbulence model;Thermal radiation;Nusselt number;Numerical simulation;Charge