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

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Effect of Rib Angle on Thermal Performance in a Two Wall Convergent/Divergent Channel with Ribs on One Wall

양측면 수축/확대 사각채널에서 한면에 설치된 리브의 각도가 열성능에 미치는 효과

  • Ahn, Soo Whan (Dpt. of Mechanical and System Engineering, Gyeongsang National University) ;
  • Lee, Myung Sung (Dpt. of Mechanical and System Engineering, Gyeongsang National University) ;
  • Bae, Sung Taek (Korean Institute of Industrial Technology)
  • 안수환 (경상대학교 기계시스템공학과) ;
  • 이명성 (경상대학교 기계시스템공학과) ;
  • 배성택 (한국생산기술연구원)
  • Received : 2014.12.24
  • Accepted : 2015.02.09
  • Published : 2015.04.10
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Abstract

The thermal performance in the channels with two-wall rectangular convergent/divergent cross-sectional areas along the axial distance was investigated experimentally. The ribbed rectangular convergent/divergent channels were manufactured with a fixed rib height (e) = 10 mm and the ratio of rib spacing (p) to height (e) = 10. Three different parallel angled ribs (a = $30^{\circ}$, $45^{\circ}$, and $60^{\circ}$) were each placed on the channel's one sided wall only. The convergent channel of $D_{ho}/D_{hi}=0.67$ and the divergent channel of $D_{ho}/D_{hi}=1.49$ were considered. The ribbed divergent channel produced better thermal performance than the ribbed convergent channel in three different restrictions; identical flow rate, identical pumping power, and identical pressure loss.

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References

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  1. Recent Progress in Air-Conditioning and Refrigeration Research : A Review of Papers Published in the Korean Journal of Air-Conditioning and Refrigeration Engineering in 2015 vol.28, pp.6, 2016, https://doi.org/10.6110/KJACR.2016.28.6.256