冷却塔热羽对核电厂周围流动与扩散影响的数值模拟研究  

Numerical simulation of the effect of cooling tower plume on the air flow and diffusion around a nuclear power plant

作　　者：裴娟[1] 李若洁 张俊芳[2] 赵丹 王雪[1] 浦祥 PEI Juan;LI Ruojie;ZHANG Junfang;ZHAO Dan;WANG Xue;PU Xiang(Shanghai Nuclear Engineering Research&Design Institute Co.Ltd.,Shanghai 200030;China Institute for Radiation Protection,Taiyuan 030006)

机构地区：[1]上海核工程研究设计院股份有限公司,上海200030 [2]中国辐射防护研究院,太原030006

出　　处：《辐射防护》2024年第4期383-390,共8页Radiation Protection

摘　　要：以某核电厂为研究对象,利用计算流体力学(CFD)方法研究了自然通风冷却塔对核电厂周围气流流动与污染物扩散的影响,并与风洞实验结果进行了比对,以验证模式有效性。结果表明:冷却塔背风侧,在近尾流区风速显著减小,湍流强度显著增大。冷却塔位于烟囱下风向时热羽排放对烟囱污染物扩散的影响较大,污染物通过冷却塔自然卷吸,出现二次排放现象,有热羽排放时的地面轴线扩散因子在1000 m前小于无热羽排放的。In this paper,a nuclear power plant is taken as the research object.The computational fluid dynamics(CFD)method is used to study the influence of natural ventilation cooling tower on the flow and pollutant diffusion around the nuclear power plant,and the results are compared with the wind tunnel experiment results to verify the validity of the model.The results show that on the leeward side of the cooling tower,the wind speed in the near wake region(including the re-circulation zone)decreases significantly,and the turbulence intensity increases significantly.When the cooling tower is located in the downwind direction of the stack,the plume emission has a great influence on the pollutant diffusion of the stack.The pollutant is naturally sucked through the cooling tower,and the secondary emission phenomenon occurs.When there is plume emission,the ground axis diffusion factor is less than that without thermal plume emission before 1000 m.

关 键 词：冷却塔 热羽 流场 浓度场 数值模拟 

分 类 号：X169[环境科学与工程—环境科学]