Masters Theses

Abstract

"Numerical simulations of a full three-dimensional hemispherical body in hypersonic flow are conducted and innovative techniques involving forward injection of gas from the stagnation point of the sphere are investigated; techniques include annular (ring) and swirled injection both with and without upstream energy deposition. Objectives of the analysis are the assessment of 1) drag reductions achieved on the blunt body (including the detrimental drag effect caused by the forward-facing injection itself) and 2) stability characteristics of the jet. Studies are conducted at free-stream Mach numbers of 10 and 6.5 at standard atmospheric conditions corresponding to 30 km altitude. While centered forward injection without upstream energy deposition is confirmed to be highly unstable either with or without swirl, annular ring injection exhibits a stabilizing influence on the jet. Energy deposition upstream of the body is shown to significantly enhance stability and penetration of the forward injection jet for all techniques"--Abstract, page iii.

Advisor(s)

Riggins, David W.

Committee Member(s)

Hosder, Serhat
Isaac, Kakkattukuzhy M.

Department(s)

Mechanical and Aerospace Engineering

Degree Name

M.S. in Aerospace Engineering

Sponsor(s)

Air Force Research Laboratory (Wright-Patterson Air Force Base, Ohio)

Publisher

Missouri University of Science and Technology

Publication Date

Summer 2011

Pagination

vii, 36 pages

Rights

© 2011 Christopher David Marley, All rights reserved.

Document Type

Thesis - Open Access

File Type

text

Language

English

Library of Congress Subject Headings

Aerodynamics, Hypersonic
Computational fluid dynamics
Drag (Aerodynamics)
Energy transfer

Thesis Number

T 9839

Print OCLC #

785142573

Electronic OCLC #

741586571

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