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Transport and dispersion of fire extinguishing agents downstream from clutter elements of aircraft engine nacelles.

机译:灭火剂在飞机发动机机舱杂波元件下游的运输和分散。

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The combination of highly turbulent airflow, flammable fluids, and numerous ignition sources makes aircraft engine nacelles a difficult fire zone to protect. Better understanding of nacelle air flow and how it influences the spread of fires and fire extinguishing agents is needed to improve the efficiency of fire suppression. The first objective was to establish a CFD model for a flow field test section to analyze the transport and dispersion of fire extinguishing agents in the presence of various clutter elements. To validate the use of the CFD model, the simulation results of the CFD model were compared to the experimental data and they show an agreement with the experimental data. The second objective was to present parametric studies to show the effects of the coflow speed, turbulence intensity and agent droplet size on the transport and dispersion of the agent particles downstream from the clutter elements.
机译:高度湍流的气流,易燃液体和众多点火源的结合使飞机发动机机舱难以保护。为了提高灭火效率,需要更好地了解机舱空气流动及其如何影响火势和灭火剂的扩散。第一个目标是为流场测试部分建立一个CFD模型,以分析存在各种杂波元素时灭火剂的传输和扩散。为了验证CFD模型的使用,将CFD模型的仿真结果与实验数据进行了比较,并显示出与实验数据的一致性。第二个目的是提出参数研究,以显示同流速度,湍流强度和药剂液滴大小对杂波元件下游药剂颗粒的传输和分散的影响。

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