Water distribution method of superlarge refluxing type natural ventilation cooling tower

The invention provides a water distribution method of a superlarge refluxing type natural ventilation cooling tower. The water distribution method includes steps of building a three-dimensional geometric model for nozzles and a three-dimensional geometric model for water distribution pipes; setting a first boundary condition; acquiring pressure difference between a water inlet side and a nozzle side of the three-dimensional geometric model for the nozzles according to the first boundary condition, preset first water distribution pipe flow quantity, turbulence energy equation and turbulent dissipation function equation; acquiring water flow resistance coefficient according to the pressure difference and water flow velocity of the nozzle; setting a second boundary condition; acquiring water flow quantity according to the second boundary condition, preset second water distribution pipe water flow, turbulence energy equation and turbulent dissipation function equation; acquiring water spraying density of a cooling tower according to water flow quantity of the nozzles, the number of the nozzles of the cooling tower and the total area of water spraying areas; and increasing water flow pressure on the water inlet side of the water distribution pipes when the water spraying density of the cooling tower is smaller than the preset water spraying density. By the water distribution method, uniformity and reliability of water distribution of the cooling tower can be improved.