河流温排放物理模型试验

从近几年做的几座火电厂冷却水工程的模型试验,着重指出因受河流岸边浅水边界的影响,温排放的流态都是复杂的三维浮射流.依据其控制方程,如要求同时满足相似指标相等的条件,则只有正态模型才能适宜于做河流的浅水温排放试验.用镇海电厂温排放的模型试验和原型观测成果进行对比,正态模型的温度场和取水温升符合较好.

Physical Model Test of Heated Discharge in Shallow Rivers

Based on the observation of the side discharge in the physical model tests of the cooling water over recent years,the flow patterns in the near and transitional regions,usually disturbed by the shallow boundaries near the river bank,are so-called 3-D buoyant jet.From the governing equations of the heated buoyant jets for the model and the prototype,the equality of the similar criteria being semultaneouslly satisfied,an undistorted model is required in the expremental study for the heated sidedischarge in the shallow river.A comparison of the heated disharge results form model tests and the prototype measurements of the Zhenhai Power Plant shows that the flow excess temperature in the preceding regions and the excess intake temperature in the undistorted model are more agreeable to the data gained in the prototype than those in the distorted model.