控制棒驱动机构排污系统三维稳态流动分析

3-D Steady Analysis of Flow in CRDM Sewerage System

为得到控制棒驱动机构(CRDM)排污管在排污工况下的流动情况,采用计算流体力学(CFD)方法对CRDM排污系统进行三维稳态流动分析。在已知CRDM排污系统阻力压降条件下,将复杂的CRDM流道简化为圆柱形阻力件,再利用反推法计算得到系统中的流量、流速和流动状态。计算结果表明,在排污工况下,系统内的流动状态为湍流流动,有利于提高排污效果。研究结果可为排污系统的设计提供参考。

In order to obtain the flow state during sewer condition in Reactor and CRDM Sewerage system （RSE）, this paper analyzes the 3-D steady flow in RSE by using Computational Fluid Dynamics （CFD） method. In the premise that the pressure drop of the RSE is known, the mass flow rate, the velocity and the type of flow in the system is obtained with the inverse method, which is proposed and validated to be applicable in the paper. The result shows that in the sewerage conditions, the type of flow in the RSE is turbulence flow, which is helpful to sewer drain. The study results give an reference for the design of RSE.