Effects of V-shaped rib arrays on turbulent heat transfer and friction of fully developed flow in a square channel Academic Article uri icon


  • This study examines turbulent heat transfer and friction characteristics of fully developed flow of air in a square channel in which two opposite walls are roughened with aligned arrays of V-shaped ribs. The rib-roughened channel models the internal cooling passages in modern gas turbine airfoils. The anglesof-attack of the V-shaped rib arrays are 45°, 60°, 90° (same as 90° full ribs), 120°, and 135°. The 60° V-shaped ribs with p e = 10 have the highest ribbed wall heat transfer and smooth wall heat transfer for a given air flow rate, and the highest channel heat transfer per unit pumping power. They are recommended for internal turbine airfoil cooling, replacing 45° or 60° full ribs. © 1991.

author list (cited authors)

  • Lau, S. C., Kukreja, R. T., & Mcmillin, R. D.

citation count

  • 74

publication date

  • July 1991