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Heat transfer augmentation in an oscillating flow

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Author

Summary, in English

For combustors a heat transfer augmentation of two to five times higher than expected has been reported. Experiments, where the temperature profile in the tail pipe of the pulse combustor has been measured, give no indication why the heat transfer should be augmented. The objective is to study the heat transfer of an oscillating flow between two parallel plates. A set of governing equations is formulated from first principles. Analytical solutions can then be obtained for both the velocity and temperature fields for the special flow considered. The heat conduction vector can so be determined and the heat transfer at the plates over one cycle is found to be dependent of the frequency of the oscillations as well as the phase difference between the pressure and temperature oscillations. From the analysis it is found that for certain intervals of the phase difference and the frequency of the oscillations an augmented heat transfer can be found. This means that an augmented heating (or cooling) process can be arranged in a steady flow by superimposing oscillations.

Department/s

Publishing year

2002

Language

English

Pages

89-93

Publication/Series

American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD

Volume

372

Issue

2

Document type

Conference paper

Publisher

American Society Of Mechanical Engineers (ASME)

Topic

  • Mathematics

Keywords

  • Oscillating flow
  • Phase difference

Conference name

ASME International Mechanical Engineering Congress and Exposition, 2002

Conference date

2002-11-17 - 2002-11-22

Conference place

New Orleans, LA, United States

Status

Published

Research group

  • Partial differential equations

ISBN/ISSN/Other

  • ISSN: 0272-5673
  • CODEN: ASMHD8