中文摘要：

通过对不同环境风速下高温气冷堆余热排出系统自然对流空冷塔的流场和温度场进行数值模拟,分析环境风对自然对流空冷塔工作状态的影响,对空冷塔出口挡风板的大小及安装位置进行了优化分析。结果表明：如果空冷塔出气口不安装挡风板,当环境风速大于6 m/s后,空冷塔内流动受到严重影响,风速大于9 m/s后甚至出现倒灌;在空冷塔出气口加装挡风板后,在9 m/s及以上风速条件下,空冷塔都可以正常运行。

英文摘要：

Environmental wind will influence the working conditions of natural convection cooling tower.The velocity and temperature fields in the natural convection cooling tower of the HTGR residual heat removal system at different environmental wind velocities were numerically simulated.The results show that,if there is no wind baffle,the flow in the cooling tower is blocked when environmental wind velocity is higher than 6 m/s,residual heat can hardly be removed,and when wind velocity is higher than 9 m/s,the air even flow downwards in the tower,so wind baffle is very necessary.With the wind baffle installed,the cooling tower works well at the wind speed even higher than 9 m/s.The optimum baffle size and positions are also analyzed.