660MW直接空冷机组钢结构小机间冷塔流动阻力特性研究

600 MW direct air cooling unit steel structure small machine indirect cooling tower resistance characteristic simulation

为研究钢结构小机间冷塔的阻力特性,以某电厂660 MW直接空冷机组小机间冷塔为研究对象,运用流体力学方程建立计算模型,借助ICEM-CFD及Meshing软件完成网格划分,利用Fluent软件计算了模型各处的流场特性,使用ANSYS软件计算了小机间冷塔各部位的阻力系数。结果表明,钢制空冷塔喉部区域负压最大,空气流速最大;X柱处局部阻力系数小于筒身处,折弯处的局部阻力系数最大;塔身各处局部阻力系数随雷诺数增大变化较小。

To study steel structure small machine indirect cooling tower resistance character,a power plant'600 MW direct cooling unit was taken as study object. Using ICEM- CFD and Meshing software to complete the grid division,the use of Fluent software to calculate the model throughout the flow characteristics,by using fluid mechanics formula modeling,resistance factor was calculated by ANSYS. The result indicated that throat position has largest negative pressure and largest air flow. Resistance factor at X column is smaller than at tower body. Bending position has largest resistance factor. Resistance factor at tower body decreases with Reynolds Number increases.