为研究电厂温排水对受纳水体的温升影响，基于无结构的三角形网格，采用有限元算法，建立了平面二维非恒定流温排水数学模型。该模型建立在非恒定水动力学模型基础上，考虑了源汇项的作用，因此能适应于各种恒定与非恒定河道水流中的温排水计算，并能适应于喇叭形和蘑菇头形等多种排水形式。该模型在多项电厂程温排水问题研究中得到了成功应用，以位于长江下游感潮河段中的南京马渡电厂为例进行了计算分析，并采用实体模型试验成果对数学模型计算结果进行了对比检验。开发研制了数学模型的后处理软件，实现了温排水运动过程的动态演示。

Based on triangular grid, a 2D unsteady flow mathematical model for warm water drainage in a power plant has been established with finite element method. Since the model is built on the unsteady hydrodynamics, the model can be used in all kinds of steady and unsteady river flow and suitable for several drainage styles. Now the model has been applied successfully in many power plants. A simulation for Madu Power Plant in Nanjing is given in the article, and the calculated results are compared with measured results of the physical model with the warm drainage. At last, the dynamic displaying of flow field and temperature rise field is illustrated in the paper.