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Unsteady Two-Phase Flows in Combustion Chambers of Solid Rocket Motors

机译：固体火箭发动机燃烧室中的非稳态两相流

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摘要

A numerical analysis of the internal flow is performed to improve the current understanding and modelling capabilities of the complex flow characteristics encountered in combustion chambers of solid rocket motors (SRMs) in presence of forced pressure oscillations. The two-phase flow is simulated with a combined Eulerian-Lagrangian approach using large-eddy simulation. The filtered Navier-Stokes equations are solved numerically for the gas phase. The paniculate phase is simulated through a Lagrangian deterministic and stochastic tracking models to provide particle trajectories and volume fraction of paniculate phase. The results obtained highlight the crucial significance of the particle dispersion in turbulent flow and high potential of statistical methods. Strong coupling between acoustic oscillations, vortical motion, turbulent fluctuations and particle dynamics is observed.
机译：对内部流动进行了数值分析，以提高当前对存在强制压力振荡的固体火箭发动机（SRM）燃烧室中遇到的复杂流动特性的了解和建模能力。使用大涡流模拟，结合欧拉-拉格朗日方法对两相流进行模拟。对气相过滤后的Navier-Stokes方程进行了数值求解。通过拉格朗日确定性和随机跟踪模型对颗粒相进行模拟，以提供颗粒轨迹和颗粒相的体积分数。获得的结果突出了在湍流中颗粒分散的关键意义和统计方法的高潜力。观察到声波振荡，涡旋运动，湍流波动和粒子动力学之间的强耦合。

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