Full surface endwall heat transfer distributions have been acquired in a staggered pin fin array with the use of an infrared camera. Values are presented at Reynolds numbers of 3000, 10,000 and 30,000 based on pin diameter and average velocity through adjacent pins. Average endwall Nusselt numbers agree closely with archival values at each Reynolds number. Locally averaged heat transfer levels show a substantial increase from the inlet through the first few rows and finally a nearly streamwise periodic condition in the second half of the eight row geometry. Increasing levels of heat transfer in the inlet region can be attributed to the leading edge vortex system, flow acceleration around pins, and the generation of turbulence. Distributions of turbulence intensity and turbulent scale are shown to help document the turbulent transport conditions through the array. Detailed endwall Nusselt number distributions are presented and compared at the three Reynolds numbers for the first four and last four rows. These detailed heat transfer distributions highlight the influence of the horseshoe vortex system in the entrance region and the wake generated turbulence throughout the pin fin array. Local velocity and turbulence distributions are presented together with local Stanton number and skin friction coefficient data to examine the aggressive nature of the turbulent mixing.
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ASME Turbo Expo 2007: Power for Land, Sea, and Air
May 14–17, 2007
Montreal, Canada
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
0-7918-4793-4
PROCEEDINGS PAPER
Endwall Heat Transfer Measurements in a Staggered Pin Fin Array With an Adiabatic Pin
Forrest E. Ames,
Forrest E. Ames
University of North Dakota, Grand Forks, ND
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Chad A. Nordquist,
Chad A. Nordquist
3M Hutchinson, Hutchinson, MN
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Lindsay A. Klennert
Lindsay A. Klennert
Sandia National Laboratories, Albuquerque, NM
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Forrest E. Ames
University of North Dakota, Grand Forks, ND
Chad A. Nordquist
3M Hutchinson, Hutchinson, MN
Lindsay A. Klennert
Sandia National Laboratories, Albuquerque, NM
Paper No:
GT2007-27432, pp. 423-432; 10 pages
Published Online:
March 10, 2009
Citation
Ames, FE, Nordquist, CA, & Klennert, LA. "Endwall Heat Transfer Measurements in a Staggered Pin Fin Array With an Adiabatic Pin." Proceedings of the ASME Turbo Expo 2007: Power for Land, Sea, and Air. Volume 4: Turbo Expo 2007, Parts A and B. Montreal, Canada. May 14–17, 2007. pp. 423-432. ASME. https://doi.org/10.1115/GT2007-27432
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