"The following thesis documents the comparison of surface enhancements in rectangular ducts for heat transfer enhancement of the air-side of off-road heat exchangers. Two sets of experiments were completed, one utilizing air as the working fluid, and the other utilizing water. Five air geometries and four water geometries were studied, including those with crosswise bumps, longitudinal vortex generators, and a unique rifling geometry. A smooth test section was also tested in the water experiments to verify the experimental setup. Such verification had been performed previously for the air experiments by Rucker . The experiment involved an applied constant heat flux to each channel as fluid was circulated through. Heat transfer and friction results were obtained using thermocouple and pressure drop data. The data was then compared and results obtained. It was found that longitudinal vortex generators give lower heat transfer coefficients than crosswise bumps, but at a substantially lower frictional cost, leading to a higher goodness factor overall. The rifling geometry showed similar heat transfer performance to the crosswise bumps, with substantially lower frictional losses, leading to very good performance overall"--Abstract, page iii.
Alofs, Darryl J.
Mechanical and Aerospace Engineering
M.S. in Aerospace Engineering
Missouri University of Science and Technology
xv, 117 pages
© 2011 James Jackson Tinsley, All rights reserved.
Thesis - Open Access
Library of Congress Subject Headings
Heat -- Convection -- Testing
Heat -- Transmission
Print OCLC #
Electronic OCLC #
Link to Catalog Record
Tinsley, James Jackson, "Heat transfer augmentation in rectangular ducts due to passive flow destabilization" (2011). Masters Theses. 5028.