Full Content is available to subscribers

Subscribe/Learn More  >

Investigation of Heat Transfer and Flow Characteristics in Fractal Tree-Like Microchannel With Steam Cooling

[+] Author Affiliations
Linqi Shui, Bo Huang, Kunkun Dong

Xi’an University of Technology, Xi’an, China

Chunyan Zhang

Xi’an Aerospace Composite Materials Research Institute, Xi’an, China

Paper No. GT2017-63973, pp. V05AT16A008; 11 pages
  • ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition
  • Volume 5A: Heat Transfer
  • Charlotte, North Carolina, USA, June 26–30, 2017
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-5087-9
  • Copyright © 2017 by ASME


Using closed-loop steam to cool blades is beneficial to improve the gas turbine thermal efficiency. Although the steam-cooled blade can provide sufficient cooling for the main body of high temperature blade, the high thermal load is found in the leading and trailing edge. To alleviate the thermal loads as well as thermal stresses, it is necessary to optimize the cooling configuration of closed loop steam-cooled blades. The tree-like branching network systems have the unique high cooling efficiency and low flow resistance as well as even temperature distribution characteristics. Utilizing the efficient transportation branching network as the internal cooling configuration for the steam-cooled blades, is likely to provide useful hits of optimal solution for solving the uneven and insufficient cooling problems at the high thermal load regions. For this purpose, the heat transfer and flow friction features of coolant flow in the tree-like branching microchannel is studied experimentally and numerically. The results indicate that, influenced by the branch effects, the fractal tree-like microchannel provides a desirable low friction factor for the turbulent flow, and an expected better heat transfer performance under the conditions of a higher Re number and larger heat flux. In addition, compared the wall temperature distributions between the fractal tree-like microchannel and serpentine channels with different coolant, adopting the tree-like branching channel configuration combination with steam cooling could provide an excellent even cooling performance for the high temperature metal wall.

Copyright © 2017 by ASME



Interactive Graphics


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

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