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Volume 30 Issue 2
Apr.  2009
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GU Han-yang, CHENG Xu, LU Dong-hua. CFD Analysis of Thermal-Hydraulic Behavior of Supercritical Water in Square Sub-Channels[J]. Nuclear Power Engineering, 2009, 30(2): 1-5.
Citation: GU Han-yang, CHENG Xu, LU Dong-hua. CFD Analysis of Thermal-Hydraulic Behavior of Supercritical Water in Square Sub-Channels[J]. Nuclear Power Engineering, 2009, 30(2): 1-5.

CFD Analysis of Thermal-Hydraulic Behavior of Supercritical Water in Square Sub-Channels

  • Received Date: 2008-01-21
  • Rev Recd Date: 2008-07-21
  • Available Online: 2025-07-28
  • Publish Date: 2009-04-15
  • Investigations on the thermal-hydraulic behavior in the SCWR fuel assembly have obtained a significant attention in the international SCWR community.However,there is still a big deficiency in knowl-edge and prediction of the heat transfer in supercritical fluids.In this paper,CFD analysis is carried out to study the thermal-hydraulic of supercritical water flows in sub-channels of a typical SCWR fuel assembly using commercial CFD code CFX 5.6.Effects of various parameters,such as flow parameters,boundary con-ditions and pitch-to-diameter ratios on the mixing phenomenon between sub-channels and heat transfer,are investigated.The mixing phenomenon due to cross flow between wall sub-channels is much stronger than that between regular sub-channels.The turbulent mixing in tight lattice(P/d=1.1)is lower than that in wide lattice(P/d>1.1),whereas,the effect of pitch-to-diameter ratio on the turbulent mixing is slight at P/d>1.2.It also shows unusual behavior in the vicinity of the pseudo-critical point and further investigation is needed.

     

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