Numerical simulation research on flow field in reactor

In this paper, some CFD examples completed by our lab. are introduced. Those examples include integral reactor core and single component flow field, also include transient and steady state. The geometry of computational domain for each example has been made by 3-D commercial software, such as UG and Pro/E. Some parts or components in the test model are removed, after the sensitivity analysis of those structures has been completed. The mesh is obtained by ICEM code, which can be single integral block or several separate blocks conbined after. All numerical simulation researches focus our analysis on the hydraulic characteristics including the flow resistant, the flow distribution and the mixing trail. In the end, the flow field in integral reactor core is taken as the special topic. The computation of the flow field has been carried out according to the test operation flow rate. Computational results has been compared with the corresponding test results. The relative error between computation and test is less than 6%. The computation results can be used to illustrate the influence on the flow distribution at core inlet by the lower supporting plate and other structures in lower plenum