한국전산유체공학회지 (Journal of computational fluids engineering)

한국전산유체공학회 (Korean Society of Computational Fluids Engineering)
권호 표지

과도상태 증기제트 방출시 과냉각수조 내의 열혼합 해석

A CFD ANALYSIS FOR THERMAL MIXING IN A SUBCOOLED WATER UNDER TRANSIENT STEAM DISCHARGE CONDITIONS

  • 강형석 (한국원자력연구소 열수력안전연구부) ;
  • 김연식 (한국원자력연구소 열수력안전연구부) ;
  • 전형길 (한국원자력연구소 열수력안전연구부) ;
  • 송철화 (한국원자력연구소 열수력안전연구부)
  • 발행 : 2006.06.01
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초록

A CFD benchmark calculation for a steam blowdown test was performed for 30 seconds to develop the methodology of numerical analysis for the thermal mixing between steam and subcooled water. In the CFD analysis, the grid model simulating the sparger and the IRWST pool were developed by the axisymmetric condition and then the steam condensation phenomena by a direct contact was modelled by the so-called condensation region model. Thermal mixing phenomenon in the subcooled water tank was treated as an incompressible flow, a free surface flow between the air and the water, a turbulent flow, and a buoyancy flow. The comparison of the CFD results with the test data showed a good agreement as a whole, but a small temperature difference was locally found at some locations. The commercial CFD code of CFX4.4 together with the condensation region model can simulate the thermal mixing behavior reasonably well when a sufficient number of mesh distribution and a proper numerical method are adopted.

키워드

참고문헌

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