An Experimental Investigation of Thermal Boundary Layer Structure and Heat Transfer in Oscillating Flows Using CARS Spectroscopy and Cold -Wire Anemometry
Kearney, Sean Patrick
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https://hdl.handle.net/2142/83991
Description
Title
An Experimental Investigation of Thermal Boundary Layer Structure and Heat Transfer in Oscillating Flows Using CARS Spectroscopy and Cold -Wire Anemometry
Author(s)
Kearney, Sean Patrick
Issue Date
1999
Doctoral Committee Chair(s)
Jacobi, Anthony M.
Lucht, Robert P.
Department of Study
Mechanical Engineering
Discipline
Mechanical Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Engineering, Electronics and Electrical
Language
eng
Abstract
A conventional, cold-wire technique is used to provide a more detailed description of the time-resolved structure of a thermal boundary layer in the oscillating flow. The cold-wire technique provides for increased data acquisition rates relative to CARS, at the expense of an ambiguous, systematic error associated with the intrusive nature of the probe. The cold-wire technique is used to investigate oscillating boundary layer flows with differing degrees of periodic flow reversal. Local, time-averaged Nusselt number results for the oscillating flow are a factor of two higher than accepted values for a laminar, developing channel flow. Periodic flow reversal did not provide a heat transfer advantage relative to non-reversed oscillating flows.
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