Masters Theses
Abstract
“A study on the use of upstream focused power deposition to reduce blunt body drag in hypersonic flow at 30-kilometer altitude is presented. A full Navier- Stokes time-marching computational fluid dynamics code, SPARK, is used to determine the effectiveness of focused energy addition to reduce drag for a representative blunt body. Modification of the pressure distribution around the body due to the energy deposition results in lower drag, similar to that obtained from an upstream spike attached to the body. The research demonstrates the effect of moving the deposition point along the upstream centerline on drag reduction and identifies an optimal location for energy deposition for maximum wave drag reduction as x/d = -1.94. It is found that higher energy deposition rates result in lower wave drag; however, the energy cost per unit drag reduction increases with increased energy deposition rate. In order to study the effects of focus, the energy deposition volume density was varied for a specific deposition rate. The drag changed very little for a range of energy deposition densities from 15.30 to 133.02 kW/mm2, indicating that the focus of the energy deposition is not a critical design factor”--Abstract, page iii.
Advisor(s)
Nelson, Harlan F., 1938-2005
Committee Member(s)
Riggins, David W.
Grow, David E.
Department(s)
Mechanical and Aerospace Engineering
Degree Name
M.S. in Aerospace Engineering
Publisher
University of Missouri--Rolla
Publication Date
Spring 2001
Pagination
ix, 59 pages
Note about bibliography
Includes bibliographical references (pages 56-58).
Rights
© 2001 Eric Edward Johnson, All rights reserved.
Document Type
Thesis - Restricted Access
File Type
text
Language
English
Thesis Number
T 7874
Print OCLC #
46860839
Recommended Citation
Johnson, Eric Edward, "An investigation into the drag reduction effects of focused energy deposition on hypersonic blunt bodies" (2001). Masters Theses. 2007.
https://scholarsmine.mst.edu/masters_theses/2007
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Comments
The author would like to thank the generous support of the NASA Langley Research Center who primarily funded this investigation and the Missouri NASA Space Grant Consortium for their aid for this research.