Document Type
Conference Proceeding
Publication Date
1-1-1997
Abstract
The effect of vortex-generators on the heat transfer from the internally ribbed passages of a turbine blade coolant channel is studied experimentally using a mass-transfer technique. Cylindrical vortexgenerators placed directly above the ribs have been used in this study. Results are reported on the effect of the spacing between the vortex-generator and the ribs. Detailed distributions of the Sherwood number contours and the centerline Sherwood number distributions are presented. Three generator-ribspacing/ rib-height (s/e) values of 0.55, 1, and 1.5 are considered. It is shown that at small generator-rib spacings (s/e=0.55), the two act as a single element, and lead to a retardation of the shear layer development past the reattachment point. This is generally associated with lower heat transfer. At a larger generator-rib spacing (s/e=I.5), the generatorwake and the rib-shear-layer interact with each other to promote mixing and heat transfer.
Publication Source (Journal or Book title)
Proceedings of the ASME Turbo Expo
Recommended Citation
Hibbs, R., Acharyal, S., Chen, Y., & Nikitopoulos, D. (1997). Mass/heat transfer in a ribbed blade coolant passage with cylindrical vortex generators: The effect of generator-rib spacing. Proceedings of the ASME Turbo Expo, 3 https://doi.org/10.1115/97-GT-161