에너지공학 (Journal of Energy Engineering)

  • 제14권1호
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  • Pages.30-36
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  • 2005
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  • 1598-7981(pISSN)
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  • 2713-7074(eISSN)
한국에너지학회 (The Korean Society for Energy)
권호 표지

원형 실린더 후류 영역의 국소 열전달 특성

Local Heat Transfer Characteristics in the Wake Region of a Circular Cylinder

  • 장병훈 (시립 인천전문대학 컴퓨터응용기계설계과)
  • Chang Byong Hoon (Department of Computer Aided Mechanical Design, Incheon City College)
  • 발행 : 2005.02.01
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⟨ 이전 논문 다음 논문 ⟩

초록

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.

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.

키워드

참고문헌

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