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Non-Uniform Array Impingement on a Curved Surface

[+] Author Affiliations
John Harrington, Jahed Hossain, Christian Garrett, Wenping Wang, Jay Kapat

University of Central Florida, Orlando, FL

Steven Thorpe, Michael Maurer

Ansaldo Energia Switzerland Ltd., Baden, Switzerland

Paper No. GT2016-56621, pp. V05AT13A007; 12 pages
doi:10.1115/GT2016-56621
From:
  • ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition
  • Volume 5A: Heat Transfer
  • Seoul, South Korea, June 13–17, 2016
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-4978-1
  • Copyright © 2016 by ASME

abstract

Experiments to investigate the effect of varying jet hole diameter and jet spacing on heat transfer from jet array impingement on a curved target surface are reported. The jet plate configurations studied have varying hole diameters and geometric spacing for spatial tuning of the heat transfer behaviour. The configuration also includes a straight section downstream of the curved section, where the effect on heat transfer and pressure loss is also investigated. For all configurations, spent air is drawn out in a single direction which is tangential to the target plate curvature. First row jet Reynolds numbers ranging from 50,000 to 160,000 are reported. The jet plate holes are sharp-edged. A steady-state measurement technique utilizing temperature sensitive paint (TSP) was used on the target surface to obtain heat transfer coefficients. Pressure taps placed on the sidewall and jet plate of the channel were used to evaluate the flow distribution in the impingement channel. Alongside the experimental work, CFD simulations were performed utilizing the v2-f eddy viscosity turbulence model to understand better the relationship between the flow field and the heat transfer on the target surface. The results from this study are compared against past results for uniform array impingement on flat surfaces.

Copyright © 2016 by ASME

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