Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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A Study of Turbulence Generation Characteristics of Large Scale Vortex Flow Mixing Vane of Nuclear Fuel Rod Bundle

핵연료 집합체에서의 대형 이차 와류 혼합날개의 난류생성 특성에 관한 연구

  • An Jeong-Soo (Graduate School, Department of Mechanical Engineering, Korea University) ;
  • Choi Yong-Don (Department of Mechanical Engineering, Korea University)
  • 안정수 (고려대학교 기계공학과 대학원) ;
  • 최영돈 (고려대학교 기계공학과)
  • Published : 2006.10.01
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Abstract

Mixing vanes have been installed in the space grid of nuclear fuel rod bundle to improve turbulent heat transfer. Split mixing vanes induce the vortex flow in the cooling water to swirl in sub-channel of fuel assembly. But, The swirling flow decays rapidly so that the heat transfer enhancing effect limited to short length after the mixing vane. In the present study, the large scale vortex flow (LSVF) is generated by rearranging the mixing vanes to the coordinated directions. This LSVF mixing vanes generate the most strong secondary flow vortices which maintain about $35D_h$ after the spacer grid. The streamwise vorticity generated by LSVF sustain two times more than that split mixing vane.

Keywords

References

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