小规模池火辐射数值研究

Proceeding of Proceedings of the 9th International Symposium on Radiative Transfer, RAD-19 Pub Date : 1900-01-01 DOI:10.1615/RAD-19.40

Bifen Wu, Xinyu Zhao, Somesh P. Roy

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引用次数: 4

摘要

采用基于蒙特卡罗射线追踪的辐射求解器，结合详细的气体和烟尘光谱模型，研究了小尺度湍流池火灾的动态湍流-辐射-烟尘相互作用。燃烧动力学采用有限速率化学和骨架化学机制进行描述。为捕捉烟尘动力学，加入了一个双方程烟尘模型。耦合求解器在 OpenFOAM-5.x 平台上开发，用于模拟辐射率为 29% 的小型正庚烷池火。然后介绍了数值模拟与实验测量结果的比较，包括沿边界的热通量分布和总体辐射率。沿中心平面辐射源项的强度与化学源项的强度进行了比较，并讨论了湍流与辐射相互作用的影响。

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A NUMERICAL STUDY OF RADIATION IN A SMALL-SCALE POOL FIRE

A Monte Carlo Ray Tracing based radiation solver, in conjunction with detailed spectral models for gases and soot, is employed to study dynamic turbulence-radiation-soot interactions for a small-scale turbulent pool fire. The combustion kinetics is described using finite-rate chemistry with a skeletal chemical mechanism. A two-equation soot model is incorporated to capture soot dynamics. The coupled solver is developed within the OpenFOAM-5.x platform, and is employed to simulate a small n-heptane pool fire with 29% of radiant fraction. Comparison of the numerical simulations with experimental measurements is then presented, including the distribution of heat flux along the boundary and the overall radiant fraction. The strength of radiation source terms is compared to that of the chemical source terms along the central plane, and discussions on the effects of turbulence-radiation interactions are provided.

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Proceeding of Proceedings of the 9th International Symposium on Radiative Transfer, RAD-19

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