冷却塔外复杂流场的数值模拟与实验研究

Numerical and experimental study on complex flow around cooling tower

中文关键词: 冷却塔，复杂流场  烟囱  返流

英文关键词: cooling tower  complex flow  rain hat  backflow

中文摘要:

      对某能源中心楼顶的冷却塔组、烟囱、通风孔等散热设备及整个楼顶空间的流场与温度场进行了整体数值模拟，探讨了高温烟囱帽引起的排烟方向改变对冷却塔组进风处空气温度场及流场的影响，并进行了实验测试。结果表明，烟囱帽使排烟向下折转，导致冷却塔进风处下部位置空气温度显著升高；较低的烟囱烟气直排时，高温烟气会先抬升一段距离，然后受冷却塔进风处负压区吸引进入冷却塔内。

英文摘要:

      The numerical simulation of flow and temperature fields of cooling tower groups, chimneys, ventilation holes as well as the whole space of the distributed energy resource roof were carried out concerning an energy center building. The effects of the presence of chimney rain hat on temperature and flow fields at the inlet of cooling tower groups were discussed, which were also validated through the experiments. The results showed that the existence of the rain hat caused the high temperature backflow to the roof ground, so the temperature at the lower part of the cooling tower inlet was relatively higher. After removing the rain hat, the high temperature flue would lift some distance first and then sucked into the cooling towers due to the negative pressure zone.