Journal of Energy Engineering (에너지공학)

The Korean Society for Energy (한국에너지학회)
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Local Heat Transfer Characteristics in the Wake Region of a Circular Cylinder

원형 실린더 후류 영역의 국소 열전달 특성

  • Chang Byong Hoon (Department of Computer Aided Mechanical Design, Incheon City College)
  • 장병훈 (시립 인천전문대학 컴퓨터응용기계설계과)
  • Published : 2005.02.01
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Abstract

This paper reports the experimental study of the heat transfer characteristics of the wake region behind a cylinder in cross flow. Local heat transfer coefficient was measured from the stagnation point (θ=0°) to 180°, and the variation of Nu in the axial direction along the cylinder was also studied. The results show that the heft transfer rate at the rear (θ=180°) near the duct wall can increase as much as 58% over the 2 dimensional value at the center of the duct. The heat transfer profiles in the wake region also show distinct effects of the aspect ratio and the heat transfer boundary condition.

본 논문에서는 실린더 후류 영역의 열전달 특성에 대한 실험결과를 보고하였다. 정체점(θ=0°)로부터 실린더 뒷면(θ=180°)까지 국소 열전달을 측정하였으며, 축 방향에 대한 누셀트 수의 변화도 조사하였다. 덕트 중앙에 비하여 덕트 벽면근처의 후류영역 열전달계수는 58% 정도 높게 측정되었으며, 종횡비와 열전달 경계조건의 영향도 조사하였다.

Keywords

References

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