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Author(s)

     Marcel Leon De Paz, B A Jubran

Title

     Predictions of Thermal and Hydrodynamic Characteristics of a Single Circular Micro-Jet Impinging on a Flat Plate

Publication Name

     ASME Turbo Expo

Publication Type

     Proceedings
Publisher
     
Place
      Berlin
Editor(s)
     
Number
     
School
     
Volume
     
Chapter
     
Pages
     
Other Publication Information
     
Publication Year
     2008
Abstract
     Jet impingement cooling remains one of the key methods in various high-end cooling applications as it can induce higher heat transfer rates. The objective of this preliminary investigation is to shed some light on micro-impingement cooling and assess the accuracy for a future 3-dimensional turbine blade model. For the purpose of this study, several micro-jet impingement cases are modeled in Gambit and iterated with Fluent. The reference model consists of a single 500μm cylindrical nozzle impinging on a constant temperature flat plate. Conducive results were found on the effects of turbulence model, Reynolds number, and H/D ratio for the Nusselt distribution on the flat plate. The Reynolds numbers iterated were: 2000,3000,4000,5000, and 6000. The different H/D ratios modeled were: 6, 5, 4, 3, 2, 1. In general, it was observed that a higher Reynolds number increased the heat transfer on the plate, but the jet to target spacing had no significant impact on it. All results were validated via comparison with several published experimental data, the deviation margins indicated a good agreement.
Keywords
     Heat Transfer, Cooling, Turbine, Impingement, Micro jet
Website
     http://www.asmeconferences.org/te08/
Paper Status
     Accepted
DOI / Publication ID
     



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