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

作　　者：徐静静 江婷 宋洪涛 党超 贾力 XU Jing-jing;JIANG Ting;SONG Hong-tao;DANG Chao;JIA Li(Huadian Distributed Energy Engineering Technology Co.,Ltd.,Beijing 100160,China;Beijing Key Laboratory of Flow and Heat Transfer of Phase Changing in Micro and Small Scale,School of Mechanical,Electronic and Control Engineering,Beijing Jiaotong University,Beijing 100044,China)

机构地区：[1]华电分布式能源工程技术有限公司,北京100160 [2]北京交通大学机械与电子控制工程学院微细尺度流动与相变传热北京市重点实验室,北京100044

出　　处：《热科学与技术》2019年第1期50-58,共9页Journal of Thermal Science and Technology

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。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 a certain distance first and then be sucked into the cooling towers due to the negative pressure zone.

关 键 词：冷却塔 复杂流场 烟囱 返流 

分 类 号：TK123[动力工程及工程热物理—工程热物理]