Two-dimensional Numerical Simulation Of Cooling-water Discharged Into Unsteady Flow

With the continuous improvement of attention to environment problem, the fast and accurate forecast of environmental impact of power plant cooling water becomes an important content of the planning of power plant and the choosing of location. The choose of suitable model and numerical method have realistic significance to improve acknowledge on water environmental effect problem and to protect environment. In this paper, based on a lot of research, do more detailed analysis and study on the applying of MIKE21 model developed in recent years in forecast environmental effect of power plant cooling water.At the base of detailed acquaintance of MIKE21 model, grasp the application of model building-up and pro-post proceed tooling. To study on the applying in forecast environmental effect of power plant cooling water. On the base of result of the cooling water movement two-dimensional model experiment of representative boundary conditions, the forecasting of environmental impact of cooling water from their power plant. Research the precision of adaptability of MIKE21 model. Its important is the influence of parameter(diffusion coefficient, heat dissipation) on precision of result .More suitable methods of model boundary condition and selection methods , scope is proposed, and summarizes the advantages and disadvantage in environmental prediction of cooling water.On the basis of the above work, MIKE21 model is applied to two represented practical project as Dandong Power Plant and Taishan Power Plant, compared with the corresponding result of physical model experiment. Through applying in two project, it is seen that if the selection of parameters is suitable, the result of MIKE21 model can reflect the cooling water transport and diffusion law, can better meet the environmental impact assessment requirements.