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Heat transfer augmentation in an oscillating flow

Holst, Anders LU ; Lundgren, E. and Marksten, U. (2002) ASME International Mechanical Engineering Congress and Exposition, 2002 In American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD 372(2). p.89-93
Abstract
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... (More)
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. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Oscillating flow, Phase difference
in
American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD
volume
372
issue
2
pages
89 - 93
publisher
American Society Of Mechanical Engineers (ASME)
conference name
ASME International Mechanical Engineering Congress and Exposition, 2002
external identifiers
  • other:CODEN: ASMHD8
ISSN
0272-5673
language
English
LU publication?
yes
id
3bd572b6-d2a1-4c98-8ac6-6a472ee098bf (old id 610657)
date added to LUP
2007-11-27 15:05:20
date last changed
2017-02-09 12:02:28
@inproceedings{3bd572b6-d2a1-4c98-8ac6-6a472ee098bf,
  abstract     = {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.},
  author       = {Holst, Anders and Lundgren, E. and Marksten, U.},
  booktitle    = {American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD},
  issn         = {0272-5673},
  keyword      = {Oscillating flow,Phase difference},
  language     = {eng},
  number       = {2},
  pages        = {89--93},
  publisher    = {American Society Of Mechanical Engineers (ASME)},
  title        = {Heat transfer augmentation in an oscillating flow},
  volume       = {372},
  year         = {2002},
}