Journal of Advanced Marine Engineering and Technology

The Korean Society of Marine Engineering (한국마린엔지니어링학회)
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An Experimental Studies on Heat Transfer and Friction Factor in a Square Channel with Varying Number of Ribbed Walls

  • Oh Se-Kyung (School of Mechanical and Aerospace Engineering, Gyeongsang National University) ;
  • Kim Won-Cheol (School of Mechanical and Aerospace Engineering, Gyeongsang National University) ;
  • Ahn Soo-Whan (Gyeongsang National University, Institute of Marine Industry) ;
  • Kang Ho-Keun (School of Mechanical and Aerospace Engineering, Gyeongsang National University) ;
  • Kim Myoung-Ho (Department of Mechanical System Engineering, Graduate School, Gyeongsang National University)
  • Published : 2005.05.01
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Abstract

An experimental study on the heat transfer and friction characteristics of a fully developed turbulent air flow in a square channel with $45^{\circ}$ inclined ribs on one, two, and four walls is reported. Tests were performed for Reynolds number ranging from 7,600 to 24,900. The pitch-to-rib height ratio, p/e, was kept at 8 and rib height-to-channel hydraulic diameter ratio, $e/D_h$, was kept at 0.0667. The heat transfer coefficient and friction factor values were enhanced with the increase in the number of ribbed walls. Results of this investigation could be used in various applications of internal channel turbulent flows involving different number of roughened walls.

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References

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