钠池内混合对流的研究  

STUDY OF MIXED CONVECTION IN SODIUM POOL

作　　者：王洲[1] 陈严[1] 

机构地区：[1]清华大学

出　　处：《核科学与工程》1995年第2期136-148,共13页Nuclear Science and Engineering

摘　　要：利用二维模拟方法对快中子反应堆钠池内混合对流现象进行了系统研究。提出了柱坐标系广义环向过流线度概念，以解决池内几何引起的三维效应问题。提出了时间子步法用于紊流方程的求解，辅助速度场边界条件处理的独特见解，并介绍如何处理流场中的质量源项，使得流函数方法同样可以用于存在质量源项的流场计算。作为校正例子，选用方形空腔水模拟实验方案，应用理论分析成果对空腔内混合对流现象进行计算，分析空腔内分层流形成的规律，并对一个典型快堆热池内混合对流现象进行了校正计算。The mixed convection phenomena in the sodium pool of fast reactor have been studied systematically by the two dimensional modeling method. A generalized concept of circumferencialline in the cylindrical ccordinates was proposed to overcome the three dimensional effect inducedby the pool geometry in an analysis of two dimensional modeling.A method of sub-step in timewas developed for solving the turbulent equations. The treatments on the boundary condition forthe auxiliary velocity field have been proposed,and the explaination of allowing the flow functionmethod to be used in the flow field in presence of a mass source term was given.As examples of verification, the experiments were conducted with water flow in a rectangularcavity, The results from theoretical analysis were applied to the numerical computation for themixed convection in the cavity. The mechanism of stratified flow in the cavity was studied.A nu-merical calculation was carried out for the mixed convection in hot plenum of a typical fastreactor.

关 键 词：钠池 快中子反应堆 混合对流 数学模型 

分 类 号：TL433[核科学技术—核技术及应用] TL327