扁平型空间内火灾顶棚射流温度特性
发布时间：2019-05-10 16:31
【摘要】：为研究扁平型空间火灾顶棚射流特性,在一长15 m、宽11 m、高4.6 m的扁平空间内进行了实验与数值模拟,空间内强制通风对火源热释放率为100~500 kW的火灾顶棚射流温度变化影响。研究发现了空间内通风、障碍物和门开口都会对顶棚射流温度产生扰动;通风对顶棚射流降温作用在火源热释放率小于200 kW的火灾场景和远离火源的区域更明显,而通风对上壁面附近最高温度所在位置并没有明显的影响;同时,通风并未改变顶棚射流以近似指数形式降低的规律,但会加速温度的下降速率,可使温度衰减系数最大提高近2倍。
[Abstract]:In order to study the characteristics of fire roof jet in flat space, experiments and numerical simulations were carried out in a flat space with a length of 15 m, a width of 11 m and a height of 4.6 m. The effect of forced ventilation in space on the temperature change of fire ceiling jet with heat release rate of 100 脳 500 kW. It is found that ventilation in space, obstacles and door opening will disturb the temperature of ceiling jet. The effect of ventilation on the cooling of ceiling jet is more obvious in the fire scene where the heat release rate of the fire source is less than 200 kW and in the area far from the fire source, but the ventilation has no obvious effect on the position of the highest temperature near the upper wall. At the same time, ventilation does not change the law that the ceiling jet decreases in the form of approximate index, but it will accelerate the temperature drop rate and increase the temperature attenuation coefficient by nearly 2 times.
【作者单位】： 中国船舶重工集团公司第七一三研究所;哈尔滨工程大学航天与建筑工程学院;
【基金】：国家自然科学基金项目(51676051) 中央高校基本科研业务费专项基金项目(HEUCF160201)
【分类号】：TU998.1
本文编号：2473818
[Abstract]:In order to study the characteristics of fire roof jet in flat space, experiments and numerical simulations were carried out in a flat space with a length of 15 m, a width of 11 m and a height of 4.6 m. The effect of forced ventilation in space on the temperature change of fire ceiling jet with heat release rate of 100 脳 500 kW. It is found that ventilation in space, obstacles and door opening will disturb the temperature of ceiling jet. The effect of ventilation on the cooling of ceiling jet is more obvious in the fire scene where the heat release rate of the fire source is less than 200 kW and in the area far from the fire source, but the ventilation has no obvious effect on the position of the highest temperature near the upper wall. At the same time, ventilation does not change the law that the ceiling jet decreases in the form of approximate index, but it will accelerate the temperature drop rate and increase the temperature attenuation coefficient by nearly 2 times.
【作者单位】： 中国船舶重工集团公司第七一三研究所;哈尔滨工程大学航天与建筑工程学院;
【基金】：国家自然科学基金项目(51676051) 中央高校基本科研业务费专项基金项目(HEUCF160201)
【分类号】：TU998.1
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，本文编号：2473818
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