• Title/Summary/Keyword: Equilateral Triangular Duct

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Friction Factor and Heat Transfer in Equilateral Triangular Ducts with Surface Roughness

  • Ahn, Soo-Whan
    • Journal of Mechanical Science and Technology
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    • v.15 no.5
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    • pp.639-645
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    • 2001
  • Experimental investigations were conducted to study forced convection of fully developed turbulent flows in horizontal equilateral triangular ducts with different surface roughness pitch ratios (P/e) of 4, 8, and 16 on one side. The ducts bottom wall was heated uniformly and the other surfaces were thermally insulated. To understand heat transfer enhancement mechanism, heat transfer rates were measured. Smooth triangular ducts were also tested for benchmark purposes. The results were compared with previous results for similarly configured channels, at which they were roughened by regularly spaced transverse ribs in the rectangular and circular channels.

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Heat Transfer and Pressure Drop Characteristics of Triangular Ducts with One Side Rib-Roughened (한 측에서만 거칠기가 설치된 삼각덕트의 마찰계수와 열전달)

  • 안수환;이영석
    • Journal of Advanced Marine Engineering and Technology
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    • v.24 no.2
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    • pp.17-23
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    • 2000
  • Experimental investigations were conducted to study the forced convection of fully-developed turbulent flow in horizontal equilateral duct fabricated with the same length and equivalent diameter, but different surface roughness pitch ratio(P/e) of 4, 8 and 16 on the one side wall only. The experiments were performed with the hydraulic diameter based Reynolds number ranged from 70,000 to 10,000. The entire bottom wall of the duct was heated uniformly and the other surfaces were thermally insulated. To understand the mechanisms of the heat transfer enhancement, measurements of the heat transfer were done to investigate the contributive factor of heat transfer promotion, namely, the fin effect. And the results were compared with those of previous investigations for similarly configured channels, at which they were roughened by regularly spaced transverse ribs in the rectangular and circular channels.

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Heat Transfer and Pressure Drop Characteristics of Triangular Ducts with One Side Rib-Roughened (한 측에서만 거칠기가 설치된 삼각덕트의 열전달과 압력강하 특성)

  • Ahn, S.W.;Lee, Y.S.;Lee, B.C.
    • Proceedings of the KSME Conference
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    • 2000.04b
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    • pp.65-70
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    • 2000
  • Experimental investigations were conducted to study the forced convection of fully-developed turbulent f)on· in horizontal equilateral duct fabricated with the same length and equivalent diameter, but different surface roughness Pitch ratio(P/e) of 4, 8 and 16 on the one side wall only The experiments were performed with the hydraulic diameter based Reynolds number ranged from 70.000 to 10,000 The entire bottom wall of the duct was heated uniformly and the other surfaces were thermally insulated. To understand the mechanisms of the heat transfer enhancement. measurements of the heat transfer were done to investigate the contributive factor of heat transfer promotion. namely the fin effect. And the results were compared with those of Previous investigations for similarly configured channels, at which they were roughened by regularly spaced transverse ribs in the rectangular and circular channels.

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