High Rotation Number Effect on Heat Transfer in a Triangular Channel With 45, Inverted 45, and 90 Ribs Conference Paper uri icon


  • Heat transfer and pressure drop have been experimentally investigated in an equilateral triangular channel (Dh = 1.83cm), which can be used to simulate the internal cooling passage near the leading edge of a gas turbine blade. Three different rib configurations (45, inverted 45, and 90) were tested at four different Reynolds numbers (1000040000), each with five different rotational speeds (0400 rpm). The rib pitch-to-height (P/e) ratio is 8 and the height-to-hydraulic diameter (e/Dh) ratio is 0.087 for every rib configuration. The rotation number and buoyancy parameter achieved in this study were 00.58 and 02.3, respectively. Both the rotation number and buoyancy parameter have been correlated to predict the rotational heat transfer in the ribbed equilateral triangular channel. For the stationary condition, staggered 45 angled ribs show the highest heat transfer enhancement. However, staggered 45 angled ribs and 90 ribs have the higher comparable heat transfer enhancement at rotating condition near the blade leading edge region.

name of conference

  • Volume 3: Heat Transfer, Parts A and B

published proceedings

  • Volume 3: Heat Transfer, Parts A and B

author list (cited authors)

  • Liu, Y., Huh, M., Han, J., & Moon, H.

citation count

  • 8

complete list of authors

  • Liu, Yao-Hsien||Huh, Michael||Han, Je-Chin||Moon, Hee-Koo

publication date

  • January 2009