摘要:以Fluent计算软件为工具、时均化N—S方程、RNGk—ε湍流模型、P1辐射模型、颗粒轨道模型为基础、美国“大力神4”运载火箭助推发动机PQM-1为算例,采用流固耦合传热的火焰传播边界条件,建立了二维轴对称纯气相流动和气固两相流动模型,分析了大长径比SRM点火瞬态凝相粒子对火焰传播过程的影响。分析结果表明,与纯气相流动模型相比,两相流模型中凝相粒子的辐射、阻尼、拖拽等作用改变了火焰在装药燃气通道、径向翼槽内的传播过程;两相流动模型可正确预示大长径比SRM的初始发火点和火焰传播过程。
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