文档介绍：Colloquium FLUID DYNAMICS 2011 Institute of Thermomechanics AS CR, ., Prague, October 19 -21, 2011 putation of Natural Draft Cooling Tower Flow T. Hyhlík Czech Technical University in Prague, Faculty of Mechanical Engineering, Department of Fluid Dynamics and Thermodynamics, Prague Abstract The model of the cooling tower is created by mercial CFD code Fluent. Produced CFD model includes natural draft and hydraulic losses. The influence of the hydraulic losses to the character of the flow is observed. Natural draft is generated in the model by means of the source term in the momentumbalance equation in the direction perpendicular to the bottom of the cooling tower. Hydraulic losses are included in the model by means of the internal boundary conditions and by means of the sinks in the individual balance equations. In the case of hydraulic losses inside the rain zone the users defined function creating sink in the momentum balances is programmed. Introduction Natural draft cooling towers are generally used in thermal power plants to remove heat absorbed in circulating cooling water. Theperformance of cooling tower can be affected by effect of crosswind condition. The knowledge of three dimensional flow structures can help us to design internal part of cooling tower. This is important espec