基于 CFD 软件的压水堆核电厂一回路传热圆管出口局部堵塞数值分析

摘要

流道堵塞是反应堆内非常严重的事故，会影响局部流动状态，造成局部烧毁。应用CFD （计算流体动力学）软件进行有关温度场和流动场的数值分析，在一定的入口流速和管壁换热条件下，对圆管不同出口局部堵塞状况进行模拟，通过应用CFD软件进行数值计算与分析，探索在不同流动与换热情况下的圆管流道内流动的流体的流动速度、压力与管壁温度分布，通过分析比较，得出流道内流体的最大流速，最高压力等重要参数与相应温度变化及温度上升过大的部位，从而根据反应堆的热工设计准则，找到流速、温度等重要热工参数在不同堵塞情况下的变化情况，通过数值方法，对反应堆内部的流道局部堵塞事故的分析与解决提供参考。%Blockage of the flow channel is a very serious reactor accident ,causing the local flow variation ,resul-ting in local burned .The goal of this study is to explore the tube at the outlet after the partial blockage of the flow and heat transfer situation .CFD software tools ( computational fluid dynamics ) for the three-dimensional analysis ,to explore outlet partial blockage of the flow tube flow and heat transfer conditions obtained in the out -let of local blockage accident in the case flow rate and heat transfer conditions for the analysis of the accident to provide reference .The temperature field and flow field in a numerical analysis to determine the flow channel within the three-dimensional fluid flow and heat transfer are obtained .