The numerical analysis of aerodynamic field in wet type natural-draft reverse-flow hyperbolic cooling tower has been carried out

and its numerical simulation being performed by using PHOENICS computing platform.It is believed from results of analysis that: a negative pressure is created in the lower under calm and stable operation state of the cooling tower

the pressure to be gradually enhanced along with increasing the tower height;the flow field in the tower to be axisymmetrically distributed

and the circumferential distribution to be uniform

the central flow velocity to be max.Because the cooling power of the tower is greatly affected by the environment

various off-design conditions

including water-spraying density

ambient temperature

and resistance variation etc.

have been calculated and compared.It was found that the influence of inlet water temperature of the tower to be basically equivalent to that of the water-spraying density upon the flow field in the tower.