대한기계학회:학술대회논문집 (Proceedings of the KSME Conference)
- 대한기계학회 2004년도 춘계학술대회
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- Pages.1819-1824
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- 2004
핵연료집합체에서의 대형이차와류 혼합날개의 난류생성 특성에 관한 연구
A Study of Turbulence Generation Characteristics of Large Scale Vortex Flow Mixing Vane of Nuclear Fuel Rod Bundle
초록
The common method to improve heat transfer in Nuclear fuel rod bundle is install a mixing vane in space grid. The previous split mixing vane is guides cooling water to swirl flow in sub-channel of fuel assembly. But, this swirl flow decade rapidly after mixing vane and the effect of enhancing the heat transfer vanish behind this short region. The large scale secondary vortex flow was generated by rearranging the inclined angle direction of mixing vanes to the coordinated directions. This LSVF mixing vanes generate the most strong secondary flow vortices which maintain about 35