Masters Theses


"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 [2007]. 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.


Homan, Kelly

Committee Member(s)

Alofs, Darryl J.
Banerjee, Arindam


Mechanical and Aerospace Engineering

Degree Name

M.S. in Aerospace Engineering


Missouri University of Science and Technology

Publication Date

Fall 2011


xv, 117 pages

Note about bibliography

Includes bibliographical references (pages 80-81).


© 2011 James Jackson Tinsley, All rights reserved.

Document Type

Thesis - Open Access

File Type




Subject Headings

Heat -- Convection -- Testing
Heat -- Transmission
Vortex generators

Thesis Number

T 9948

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