The effects of Coriolis force and centrifugal buoyancy have a significant impact on heat transfer behavior inside rotating internal serpentine coolant channels for turbine blades. Due to the complexity of added rotation inside such channels, detailed knowledge of the heat transfer will greatly enhance the blade designer's ability to predict hot spots so coolant may be distributed more effectively. The effects of high rotation numbers are investigated on the heat transfer distributions for different rib types in near entrance and entrance region of the channels. It is important to determine the actual enhancement derived from turbulating channel entrances where heat transfer is already high due to entrance effects and boundary layer growth. A transient liquid crystal technique is used to measure detailed heat transfer coefficients (htc) for a rotating, short length, radially outward coolant channel with rib turbulators. Different rib types such as 90 deg, W, and M-shaped ribs are used to roughen the walls to enhance heat transfer. The channel Reynolds number is held constant at 12,000 while the rotation number is increased up to 0.5. Results show that in the near entrance region, the high performance W and M-shaped ribs are just as effective as the simple 90 deg ribs in enhancing heat transfer. The entrance effect in the developing region causes significantly high baseline heat transfer coefficients thus reducing the effective of the ribs to further enhance heat transfer. Rotation causes increase in heat transfer on the trailing side, while the leading side remains relatively constant limiting the decrement in leading side heat transfer. For all rotational cases, the W and M-shaped ribs show significant effect of rotation with large differences between leading and trailing side heat transfer.
Skip Nav Destination
Article navigation
Research-Article
Effect of Rotation on Detailed Heat Transfer Distribution for Various Rib Geometries in Developing Channel Flow
Justin A. Lamont,
Mary Anne Alvin
Mary Anne Alvin
Search for other works by this author on:
Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received September 25, 2012; final manuscript received July 26, 2013; published online October 25, 2013. Assoc. Editor: Phillip M. Ligrani.
J. Heat Transfer. Jan 2014, 136(1): 011901 (10 pages)
Published Online: October 25, 2013
Article history
Received:
September 25, 2012
Revision Received:
July 26, 2013
Citation
Lamont, J. A., Ekkad, S. V., and Anne Alvin, M. (October 25, 2013). "Effect of Rotation on Detailed Heat Transfer Distribution for Various Rib Geometries in Developing Channel Flow." ASME. J. Heat Transfer. January 2014; 136(1): 011901. https://doi.org/10.1115/1.4025211
Download citation file:
Get Email Alerts
Cited By
On Prof. Roop Mahajan's 80th Birthday
J. Heat Mass Transfer
Thermal Hydraulic Performance and Characteristics of a Microchannel Heat Exchanger: Experimental and Numerical Investigations
J. Heat Mass Transfer (February 2025)
Related Articles
Buoyancy-Driven Flow Reversal Phenomena in Radially Rotating
Serpentine Ducts
J. Heat Transfer (February,2000)
An Experimental Study on Mixed Convection in a Horizontal Rectangular Channel Heated From a Side
J. Heat Transfer (November,2000)
A New Low Reynolds Stress Transport Model for Heat Transfer and Fluid in Engineering Applications
J. Heat Transfer (April,2007)
Experimental and Numerical Impingement Heat Transfer in an Airfoil Leading-Edge Cooling Channel With Cross-Flow
J. Turbomach (January,2009)
Related Proceedings Papers
Related Chapters
Design and Analysis of a Double-Half-Revolution Mechanism Exploration Rover
Proceedings of the 2010 International Conference on Mechanical, Industrial, and Manufacturing Technologies (MIMT 2010)
The Direct Contribution of Spin-Down Compression for Rotochemical Deviations in Stars Containing Mixed- Phase Matter
International Conference on Advanced Computer Theory and Engineering, 4th (ICACTE 2011)
Near-Duplicate Image Detection Based on E 2 LSH
International Conference on Instrumentation, Measurement, Circuits and Systems (ICIMCS 2011)