AUGMENTED HEAT-TRANSFER IN RECTANGULAR CHANNELS OF NARROW ASPECT RATIOS WITH RIB TURBULATORS Academic Article uri icon

abstract

  • The effects of the rib angle-of-attack on the distributions of the local heat transfer coefficient and on the friction factors in short rectangular channels of narrow aspect ratios with a pair of opposite rib-roughened walls are determined for Reynolds numbers from 10 000 to 60 000. The channel width-to-height ratios are 2 4 and 1 4; the corresponding rib angles-of-attack are 90, 60, 45, and 30, respectively. The results indicate that the narrow-aspect-ratio channels give better heat transfer performance than the wide-aspect-ratio channels for a constant pumping power. Semi-empirical friction and heat transfer correlations are obtained. The results can be used in the design of turbine cooling channels of narrow aspect ratios. 1989.

published proceedings

  • INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER

author list (cited authors)

  • HAN, J. C., OU, S., PARK, J. S., & LEI, C. K.

citation count

  • 149

complete list of authors

  • HAN, JC||OU, S||PARK, JS||LEI, CK

publication date

  • September 1989