3-D Numerical Simulation Of Thermal Discharge In Constant Homogeneous Water Area

Power plant is the major unit of thermal discharge, and we must pay much attention to the impact on the ecological environment of receiving water. The receiving water's density will be changed after thermal discharge get into it, the receiving water will be appeared stratified flow phenomena, while stratified flow will affects movement and temperature distribution of receiving water, at the same time, surface temperature of receiving water will increase because of buoyancy in thermal discharge, then enhance heat radiation, evaporation and conduction effects from water surface to atmosphere. So it's very important to simulating transport and variation of thermal discharge in receiving water area with three-dimensional, prediction the distribution of velocity and temperature rise, analyze scope and extent of thermal pollution.This paper carry on three-dimensional numerical simulation mainly for surface turbulent buoyant jets that exist transverse incoming flow, including: select calculation conditions, establish k ?εturbulent model with adding buoyancy revising item, discrete control equation on staggered grid with finite volume method, deal with coupling of velocity and pressure with SIMPLE algorithm, finally obtain convergence solutions. From the results of flow field and temperature rise field, we can come to next conclusion, in the same depth, temperature will trend downstream with increasing of incoming flow, in the same incoming flow, temperature will trend upstream with increasing depth. Meanwhile, through analysis of calculation results and experiment measure results, the trend of plane temperature rise distribution is consistent. The k ?ε turbulent model with adding buoyancy revising item can be used in simulation calculation of practical engineering.