Simulation of heat transfer of supercritical water in obstacle-bearing vertical tube

NUCLEAR ENGINEERING

Simulation of heat transfer of supercritical water in obstacle-bearing vertical tube

ZHANG Bo，

SHAN Jianqiang，

JIANG Jing

Nuclear Science and Techniques

Vol.21, No.4

pp.241-245

Published in print 20 Aug 2010

DOI：10.13538/j.1001-8042/nst.21.241-245

35701

The heat transfer coefficient is very low at bulk temperatures higher than the pseudo-critical point, because the supercritical pressure leads to a vapor-like fluid. In this paper, the heat transfer downstream an obstacle-bearing vertical tube is simulated by the CFD code of Fluent 6.1, using an adaptive grid in the supercritical condition. The reliable results are obtained by the RNG k-ε model using the enhanced wall treatment. The blockage ratio and local temperature of obstacle affect greatly the heat transfer enhancement, and the resultant influence region and decay trend are compared with the existing equations.

Supercritical water reactorObstacleEnhancementHeat transfer

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