火流中的水雾动力学

V. Novozhilov
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引用次数: 3

摘要

考虑了轴对称流体中液滴运动的拉格朗日模型,并将其应用于喷头、气溶胶和水雾等主动消防系统中的喷水。与先前已知的模型相反,液滴运动方程以更一般的形式集成,轴向流速度是两个空间坐标的任意函数。该模型的第二个主要优点是它充分考虑了液滴的蒸发。导出了流动中任何位置的汽化率、密度和阻力的显式公式。这些公式可直接应用于许多消防工程问题中,例如用水雾估算隔间冷却速率,以及用喷头或水雾喷雾研究烟雾层的失稳。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Water Spray Dynamics in Fire Flows
Lagrangian model of droplet movement in axisymmetrical fluid flow is considered in application to water sprays in active fire control systems, such as sprinklers, aerosols and water mists. In contrast to previously known models equations of droplet motion are integrated in much more general form, with axial flow velocity being arbitrary function of two spatial coordinates. Second major advantage of the model is that it fully accounts for the droplet evaporation. Explicit formulas are derived for vaporization rate density and drag force at any location in the flow. Such formulas are directly applicable in a number of fire engineering problems, for example in estimating compartment cooling rates by water sprays, and in studying smoke layer destabilization by sprinkler or water mist sprays.
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