Pulse Combustion: Impinging Jet Heat Transfer EnhancementFootnote¹
¹This work was performed at the Combustion Research Facility, Sandia National Laboratories, supported by the U.S. Department of Energy, Office of Industrial Technologies, Advanced Industrial Concepts Division.

R A. EIBECK Associate Professor of Mechanical Engineering, University of California, Berkeley, CA, 94720

J. O. KELLER Senior Member of Technical Staff, Sandia National Laboratories, Livermore, CA, 94551-0969

T. T. BRAMLETTE Senior Member of Technical Staff, Sandia National Laboratories, Livermore, CA, 94551-0969

D. J. SAILOR Research Assistant, Mechanical Engineering, University of California, Berkeley, CA, 94720

Abstract

A new method for convective heat transfer enhancement is described. The technique involves the use of a pulse combustor to generate a transient jet that impinges on a flat plate. Enhancements in convective heat transfer of a factor of up to 2.5, compared to a steady impinging jet at approximately the same Reynolds number, have been obtained. Heat transfer data for several experimental configurations are presented. Flow field visualizations and theoretical calculations are used to suggest an enhancement mechanism.

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¹This work was performed at the Combustion Research Facility, Sandia National Laboratories, supported by the U.S. Department of Energy, Office of Industrial Technologies, Advanced Industrial Concepts Division.

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Pulse Combustion: Impinging Jet Heat Transfer EnhancementFootnote¹
¹This work was performed at the Combustion Research Facility, Sandia National Laboratories, supported by the U.S. Department of Energy, Office of Industrial Technologies, Advanced Industrial Concepts Division.

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Pulse Combustion: Impinging Jet Heat Transfer EnhancementFootnote11This work was performed at the Combustion Research Facility, Sandia National Laboratories, supported by the U.S. Department of Energy, Office of Industrial Technologies, Advanced Industrial Concepts Division.

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Pulse Combustion: Impinging Jet Heat Transfer EnhancementFootnote¹
¹This work was performed at the Combustion Research Facility, Sandia National Laboratories, supported by the U.S. Department of Energy, Office of Industrial Technologies, Advanced Industrial Concepts Division.