冷却塔CFD数值模拟和结构计算

CFD numerical simulation and structural calculation of cooling towers

首先对5500、9000、13000 m^(2)冷却塔进行CFD数值模拟,获得冷却塔外表面的风压分布,对该风压分布随冷却塔增大的变化规律进行分析,随后采用Ansys对5500、9000、13000 m^(2)冷却塔分别采用0.55H风压分布曲线和整体三维风压进行了结构计算,对采用0.55H风压分布曲线代替整体三维风压的安全度进行了分析。结果表明:冷却塔外表面风压的分布曲线形状基本一致,但最小负压值随冷却塔增大而减小,采用0.55H风压分布曲线代替整体三维风压进行冷却塔结构设计的安全度随冷却塔增大而降低。

Firstly,CFD numerical simulation of 5500 m^(2),9000 m^(2)and 13000 m^(2)cooling towers is performed to acquire the wind pressure distribution on external surface of cooling tower,and structural calculation of 5500 m^(2),9000 m^(2)and 13000 m^(2)cooling towers under 0.55H wind pressure and three-dimensional wind pressure is done.The results indicate the curve figure of wind pressure distribution is almost consistent,but the minimum value of negative pressure decreases with the increase of the cooling tower.Besides,the designing safety degree of using 0.55H wind pressure instead of three-dimensional wind pressure decreases along with the increase of the cooling tower.