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给出了一种基于小火舌模型的固体火箭发动机燃烧室内复杂压缩流场中湍流扩散的数值仿真方法.该方法将κ-ε两方程湍流模型与扩展层流小火舌模型和并在一起对火焰进行数学描述,使用聚丁二烯AP/HTPB推进剂的8组份3反应式模型描述了湍流与非平衡化学反应之间的耦合.计算结果表明:燃烧室内漩涡运动呈现出一定的时间与空间分布,轴向加质导致燃烧室截面上流场轴向速度分布的不均衡.
A numerical simulation method of turbulent diffusion in complex compression flow field of a solid rocket motor combustion chamber based on a small flaming model is presented in this paper. The κ-ε two-equation turbulence model and the extended laminar flow model together with the flame Mathematical description is given and the coupling between turbulence and non-equilibrium chemical reactions is described using the 8-component 3-reaction model of polybutadiene AP / HTPB propellant.The calculated results show that the swirling motion in the combustion chamber presents a certain time and space Distribution, axial mass led to the combustion chamber cross-section axial flow velocity distribution is not balanced.