【摘要】 针对某600 MW机组的逆流湿式冷却塔在侧风条件下冷却效果恶化现象,采用CFD的FLUENT软件,对进风口处加装导风板的冷却塔传热传质性能进行了数值模拟。通过设置不同的导风板结构参数,并基于冷却数评价方法研究了导风板长度、安装角及弧度的优化选型。模拟结果表明:当风速为4 m/s时,冷却效果最差,此时采用叶片长度为6～8 m的导风板冷却效果最好;定风速4 m/s工况下,直板型叶片最佳优化安装角为40°,与无板相比,冷却数的平均优化度■为0.659;定风速4 m/s、安装角40°工况下,旋流型叶片最佳优化弧度为30°,与直板相比,■为0.761。更多还原

【Abstract】 Aiming at the deterioration of the cooling effect of the counterflow wet cooling tower of a 600MW unit under the crosswind condition,the heat transfer and mass transfer performance of the cooling tower with the air deflector at the air inlet is numerically simulated by the CFD FLUENT.The optimal selection of the length,installation angle and curvature of the air deflector was studied by setting different structural parameters of the air deflector and based on the cooling number evaluation method.The simulation results show that when the wind speed is 4 m/s,the cooling effect is the worst.At this time,the air deflector with the blade length of 6～8 m has the best cooling effect;under the condition of constant wind speed of 4 m/s,the optimum installation angle of straight blade is 40°.The value of ■(the average optimization of the cooling number)is 0.659 compared to no air deflector;under the condition of constant wind speed of 4 m/s and installation angle of 40°,the optimum curvature of the swirling blade is 30°,and the value of is ■0.659 compared with the straight plate.更多还原