The aerodynamic behavior of dozens of axial flow fans incorporated with air-cooled condensers in a power plant is different from that of an individual fan

which causes the so-called cluster effect.The experimental setup was established according to air-cooling system of the 300MW level power generating units

based on which

the cluster factors of each fan were tested with fan speed of 600r/m and 800r/m

respectively.The air flow rate generated by individual fan was compared with that of the fan cluster.The results indicated that the cluster factor was related to the fan speed

as well as to the number of operating fans.The higher the fan speed

the more obviously the inlet air flow of a fan was influenced by the neighbour fans.The cluster factors of fans at the periphery of air-cooling island were generally smaller than that of fans near the center.This can be due to the more significant variations of inlet air flow fields for the peripheral fans.