Heat Transfer Enhancements in Rotating Two-Pass Coolant Channels With Profiled Ribs: Part 1

Heat Transfer Enhancements in Rotating Two-Pass Coolant Channels With Profiled Ribs: Part 1–Average Results

Published:2000-02-01 Issue:1 Volume:123 Page:97-106
ISSN:0889-504X
Container-title:Journal of Turbomachinery
language:en
Short-container-title:

Author:

Acharya S.¹,Eliades V.¹,Nikitopoulos D. E.¹

Affiliation:

1. Mechanical Engineering Department, Louisiana State University, Baton Rouge, LA 70803

Abstract

The effects of ribs with different cross-stream profiles are investigated through detailed, surface mass (heat) transfer distributions along four active walls of a square duct containing a sharp 180 deg bend. The duct simulates two passes of an internal coolant channel in a gas turbine engine with ribs mounted on two opposite walls. Mass (heat) transfer measurements, taken using the naphthalene sublimation technique, are presented for a Reynolds number of 30,000, and rotation number of 0.3. Comparisons are made with conventional ribs having a rectangular cross section. It is shown that the use of certain profiled ribs provides considerable heat transfer enhancements over conventional ribs with the same blockage ratio in the duct. These enhancements are attributed to the generation of longitudinal vorticity (or secondary flows) by the profiled ribs in the channel.

Publisher

ASME International

Subject

Mechanical Engineering

Link

http://asmedigitalcollection.asme.org/turbomachinery/article-pdf/123/1/97/5843516/97_1.pdf

Reference23 articles.

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3. Kukreja, R. T., Lau, S. C., and McMillin, X., 1992, “Local Heat/Mass Transfer Distribution in a Square Channel With Full and V-Shaped Ribs,” Int. J. Heat Mass Transf., 36, pp. 2013–2020.

4. Chen, Y., Nikitopoulos, D., Hibbs, R., Acharya, S., and Myrum, T., 1999, “Detailed Heat/Mass Transfer Distribution in a Ribbed Coolant Passage,” Int. J. Heat Mass Transfer, in press.

5. Johnson, B. V., Wagner, J. H., Steuber, G. D., and Yeh, F. C., 1994, “Heat Transfer in Rotating Serpentine Passages With Trips Skewed to the Flow,” ASME J. Turbomach., 116, pp. 113–123.

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