EFFECTS OF V-SHAPED RIB ARRAYS ON TURBULENT HEAT-TRANSFER AND FRICTION OF FULLY-DEVELOPED FLOW IN A SQUARE CHANNEL Academic Article uri icon

abstract

  • 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.

published proceedings

  • INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER

author list (cited authors)

  • LAU, S. C., KUKREJA, R. T., & MCMILLIN, R. D.

citation count

  • 85

complete list of authors

  • LAU, SC||KUKREJA, RT||MCMILLIN, RD

publication date

  • January 1, 1991 11:11 AM