• 제목/요약/키워드: Delta Wing Vortex Generator(DWVG)

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Plate fin-oval tube 열교환기에서 와류발생체에 의한 fin 표면에서의 국소 열전달 특성 (Local Heat Transfer Characteristics on Fin Surface of Plate Fin - Oval Tube with Delta Wing Vortex Generators)

  • 신석원;정인기;김수연
    • 대한기계학회:학술대회논문집
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    • 대한기계학회 2007년도 춘계학술대회B
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    • pp.2390-2395
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    • 2007
  • The present research was experimentally performed to analyze the effect of delta-wing vortex generators(DWVG) on the heat transfer of fin surface of the plate fin-oval tube. The local heat transfer coefficient of the fin surface for four kinds of DWVG's arrangement was measured by the naphthalene sublimation technique for Reynolds numbers ranging from 2000 to 3200. The results showed that the heat transfer of the plate fin-oval tube can be significantly enhanced by DWVG for relatively low Reynolds numbers.

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Delta Wing Vortex Generator가 부착된 Plate Fin-Oval Tube 열교환기에서 휜 주위의 유동에 대한 수치적 해석 (The Numerical Analysis of the Flow Fields near Fin Surface of a Plate Fin-Oval Tube Heat Exchanger with Delta Wing Vortex Generators)

  • 신석원;정인기;김수연;이영우
    • 대한기계학회:학술대회논문집
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    • 대한기계학회 2008년도 추계학술대회B
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    • pp.2023-2028
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    • 2008
  • In present study, the flow field near the fin surface of plate fin - oval tube heat exchanger with delta wing vortex generator was numerically analyzed. As results, the well developed vortex behind delta wing was observed. These vortex can improve heat transfer fin surface behind delta wing vortex generators.

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Plate Fin-Oval Tube 열교환기에서 익형 와류발생체에 의한 Fin 표면에서의 국소 열전달에 대한 특성 (Local Heat Transfer Characteristics on Fin Surface of Plate Fin-Oval Tube with Delta Wing Vortex Generators)

  • 신석원;정인기;김수연
    • 대한기계학회논문집B
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    • 제33권10호
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    • pp.757-766
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    • 2009
  • In the present study, the effect of delta-wing vortex generators(DWVG) on the local heat transfer of the plate fin-oval tube was experimentally analyzed for Reynolds numbers for 2000, 2500 and 3200. The local heat transfer coefficient of the fin surface for four type DWVGs was measured by the naphthalene sublimation technique. As the results, the distribution of the heat transfer coefficient at rear of DWVGs showed longitudinal contours for common flow down DWVGs and wavy contours for common flow up DWVGs. The distribution showed many cell type contours at near wall and downstream for all DWVGs. Compared to case without DWVGs in present experimental tests, all DWVGs showed the best enhancement of heat transfer at Re=2000. Of 4 cases of DWVGs, D type showed the best enhancement of heat transfer.