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基于经典羽流模型,通过全尺寸试验测量大空间喷头上方羽流中心线不同高度处的温度和速度,分析羽流中心线温度和速度的变化规律,并与经典羽流模型做比较,得出喷淋对大空间喷头上方羽流特性的影响。结果表明:喷淋启动前,羽流温度和速度随高度增加的变化趋势与经典羽流模型基本一致;喷淋启动后,各高度处温度显著降低,速度显著减小,温度随时间的变化趋势与喷淋压力有关,且温度和速度随高度增加的变化趋势发生明显改变。
Based on the classical plume model, the temperature and velocity at different altitudes of plume above the large space nozzle were measured by full-scale test, and the variation rule of plume’s centerline temperature and velocity was analyzed and compared with the classical plume model Influence of Spraying on Plume Characteristics Above Large Sprinklers. The results show that the trend of plume temperature and velocity increases with height before the start of spraying is basically the same as that of the classical plume model. After the start of spraying, the temperature at each height is significantly reduced, the speed is significantly reduced and the trend of temperature with time With the spray pressure, and temperature and speed with the height of the change trend has changed significantly.