0

Full Content is available to subscribers

Subscribe/Learn More  >

Experimental Study of Heat Transfer Augmentation in High Aspect-Ratio Channels Featuring Different Dimple Configurations

[+] Author Affiliations
Kartikeya Tyagi, Prashant Singh, Jaideep Pandit, Sridharan Ramesh, Srinath V. Ekkad

Virginia Tech, Blacksburg, VA

Anil Tolpadi

GE Aviation, Niskayuna, NY

Paper No. GT2015-43621, pp. V05AT11A033; 11 pages
doi:10.1115/GT2015-43621
From:
  • ASME Turbo Expo 2015: Turbine Technical Conference and Exposition
  • Volume 5A: Heat Transfer
  • Montreal, Quebec, Canada, June 15–19, 2015
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-5671-0
  • Copyright © 2015 by ASME

abstract

Transient liquid crystal technique was employed for experimental investigation of heat transfer distribution in high aspect ratio rectangular ducts featuring different dimple configurations. Four different dimple configuration shapes, viz. diamond, square, triangular and cylindrical, have been studied. This study also attempts to understand the dimple side wall heat transfer and correlate to the mechanisms of the flow inside the dimple. A brief numerical simulation study was also conducted to understand the vortex formation inside the dimples and how they affect the heat transfer on the dimple walls. Experiments were carried out at three different Reynolds number of 10,000, 16,000 and 21,000. Detailed normalized Nusselt number plots for different configurations has been presented. Pressure drop across each geometry was also recorded and a comparison of thermal–hydraulic performance is given. It was observed that heat transfer enhancement due to dimples was maximum for Re =10,000 case when compared to a flat plate scenario at the same Reynolds number. Thermal–hydraulic performance comparison showed that diamond and triangular dimples performed better due to lower pressure drop penalty.

Copyright © 2015 by ASME
Topics: Heat transfer

Figures

Tables

Interactive Graphics

Video

Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In