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.
Skip Nav Destination
Article navigation
January 2001
Technical Papers
Heat Transfer Enhancements in Rotating Two-Pass Coolant Channels With Profiled Ribs: Part 1–Average Results
S. Acharya,
S. Acharya
Mechanical Engineering Department, Louisiana State University, Baton Rouge, LA 70803
Search for other works by this author on:
V. Eliades,
V. Eliades
Mechanical Engineering Department, Louisiana State University, Baton Rouge, LA 70803
Search for other works by this author on:
D. E. Nikitopoulos
D. E. Nikitopoulos
Mechanical Engineering Department, Louisiana State University, Baton Rouge, LA 70803
Search for other works by this author on:
S. Acharya
Mechanical Engineering Department, Louisiana State University, Baton Rouge, LA 70803
V. Eliades
Mechanical Engineering Department, Louisiana State University, Baton Rouge, LA 70803
D. E. Nikitopoulos
Mechanical Engineering Department, Louisiana State University, Baton Rouge, LA 70803
Contributed by the International Gas Turbine Institute and presented at the 45th International Gas Turbine and Aeroengine Congress and Exhibition, Munich, Germany, May 8-11, 2000. Manuscript received by the International Gas Turbine Institute February 2000. Paper No. 2000-GT-227. Review Chair: D. Ballal.
J. Turbomach. Jan 2001, 123(1): 97-106 (10 pages)
Published Online: February 1, 2000
Article history
Received:
February 1, 2000
Citation
Acharya , S., Eliades , V., and Nikitopoulos, D. E. (February 1, 2000). "Heat Transfer Enhancements in Rotating Two-Pass Coolant Channels With Profiled Ribs: Part 1–Average Results ." ASME. J. Turbomach. January 2001; 123(1): 97–106. https://doi.org/10.1115/1.1331539
Download citation file:
Get Email Alerts
Related Articles
Heat Transfer Enhancements in Rotating Two-Pass Coolant Channels With Profiled Ribs: Part 2—Detailed Measurements
J. Turbomach (January,2001)
Mass∕Heat Transfer in Rotating, Smooth, High-Aspect Ratio (4:1) Coolant Channels With Curved Walls
J. Turbomach (April,2009)
Local Heat/Mass Transfer and Friction Loss Measurement in a Rotating Matrix Cooling Channel
J. Heat Transfer (January,2012)
Related Proceedings Papers
Related Chapters
Laminar Fluid Flow and Heat Transfer
Applications of Mathematical Heat Transfer and Fluid Flow Models in Engineering and Medicine
Baking Pizza by Infrared Radiation and Conduction Heat Transfers and Mass Transfer in Unsteady State
Electromagnetic Waves and Heat Transfer: Sensitivites to Governing Variables in Everyday Life
Control and Operational Performance
Closed-Cycle Gas Turbines: Operating Experience and Future Potential