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首页> 外文期刊>Atomization and Sprays: Journal of the International Institutes for Liquid Atomization and Spray Systems >EFFECT OF ENGINE NACELLE CLUTTER DENSITY ON DOWNSTREAM WATER SPRAY DISTRIBUTIONS
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EFFECT OF ENGINE NACELLE CLUTTER DENSITY ON DOWNSTREAM WATER SPRAY DISTRIBUTIONS

机译：发动机机舱杂波密度对下游喷水分布的影响

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摘要

This investigation presents the results of spray interactions with clutter elements in a surrounding turbulent airflow,with an emphasis on aiding the development of spray transport models to be used within a computational fire code.Many Halon replacement agents have high boiling points and discharge in a liquid state,thus resulting in the transport of liquid droplets through cluttered engine nacelles.By increasing the understanding of liquid state suppressant transport through cluttered environments,the overall effectiveness of fire suppressant systems could be increased.The current paper examines agent droplet diameter and velocity at locations upstream and downstream of a clutter package consisting of staggered cylindrical arrays of various streamwise spacing.The agent(water)was discharged upstream of the clutter from a two-phase nozzle into the main airflow.Three-dimensional droplet velocity and diameter measurements were taken upstream and downstream of the clutter,for three separate clutter densities under a constant main airflow speed of approximately 5.0 m/s and a nominal turbulence level of 10%.The downstream data are compared to the upstream distributions to provide insight into the effect of clutter density on agent distribution.
机译：本研究介绍了与周围湍流气流中的杂波元件的喷雾相互作用的结果，重点是帮助在计算火灾码内使用的喷雾传输模型的发展。Many Halon替代剂具有高沸点并在液体中排出状态，通过杂乱的发动机Nacelles导致液滴传输。通过杂乱环境的理解，通过杂乱环境的理解，可以增加火灾抑制系统的总有效性。目前的纸张检查了地点的试剂直径和速度由杂波封装的上游和下游，由各种流动间距的交错圆柱形阵列组成。药剂（水）从两相喷嘴排出杂波的上游，进入主气流。上游采集了三维液滴速度和直径测量和杂乱的下游，三个分离TE杂波密度在恒定的主气流速度下约为5.0米/秒，标称湍流水平为10％。下游数据与上游分布进行比较，以了解杂波密度对试剂分布的影响。

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