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Numerical Predictions of Pressure Drop and Heat Transfer in a Blade Internal Cooling Passage with Continuous/Truncated Ribs

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Author

Summary, in English

Ribs are often used in the mid-section of internal turbine blades to augment heat transfer from the blade wall to a coolant, but most research works are concerned only with continuous ribs attached to the side walls. In this paper, a turbulent flow and heat transfer of a rectangular passage with continuous and truncated ribs on opposite walls have been predicted numerically. Two types of ribs are studied: 90-deg ribs and 45-deg V-shaped ribs. The inlet Reynolds numbers range from 12,000 to 60,000. The complex three-dimensional turbulent flows inside the blade internal coolant passage and heat transfer between the rib-walls and side-walls are presented. The overall performances of six different ribbed passages are evaluated and compared. Numerical results show that the passage with truncated V-shaped ribs is very effective in improving the heat transfer performance with a low pressure drop.

Department/s

Publishing year

2012

Language

English

Pages

573-590

Publication/Series

Heat Transfer Research

Volume

43

Issue

6

Document type

Journal article

Publisher

Begell House

Topic

  • Energy Engineering

Keywords

  • heat transfer
  • rib
  • continuous
  • truncated
  • computation

Status

Published

ISBN/ISSN/Other

  • ISSN: 1064-2285