Numerical Simulation of Vortex Generating Jets in Zero and Adverse Pressure Gradients

91 Pages·2016·9.1 MB·English

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Theses and Dissertations
2007-09-11
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Curtis Lynn Memory
Brigham Young University - Provo
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Memory, Curtis Lynn, "Numerical Simulation of Vortex Generating Jets in Zero and Adverse Pressure
Gradients" (2007). Theses and Dissertations. 1190.
https://scholarsarchive.byu.edu/etd/1190
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NUMERICAL SIMULATION OF VORTEX GENERATING JETS
IN ZERO AND ADVERSE PRESSURE GRADIENTS
by
Curtis L. Memory
A thesis submitted to the faculty of
Brigham Young University
in partial fulfillment of the requirements for the degree of
Master of Science
Department of Mechanical Engineering
Brigham Young University
December 2007

Copyright (cid:176)c 2007 Curtis L. Memory
All Rights Reserved

BRIGHAM YOUNG UNIVERSITY
GRADUATE COMMITTEE APPROVAL
of a thesis submitted by
Curtis L. Memory
This thesis has been read by each member of the following graduate committee and
by majority vote has been found to be satisfactory.
Date Deryl O. Snyder, Chair
Date Scott L. Thomson
Date W. Jerry Bowman

BRIGHAM YOUNG UNIVERSITY
As chair of the candidate’s graduate committee, I have read the thesis of Curtis L.
Memory in its final form and have found that (1) its format, citations, and biblio-
graphical style are consistent and acceptable and fulfill university and department
style requirements; (2) its illustrative materials including figures, tables, and charts
are in place; and (3) the final manuscript is satisfactory to the graduate committee
and is ready for submission to the university library.
Date Deryl O. Snyder
Chair, Graduate Committee
Accepted for the Department
Matthew R. Jones
Graduate Coordinator
Accepted for the College
Alan R. Parkinson
Dean, Ira A. Fulton College of
Engineering and Technology

ABSTRACT
NUMERICAL SIMULATION OF VORTEX GENERATING JETS
IN ZERO AND ADVERSE PRESSURE GRADIENTS
Curtis L. Memory
Department of Mechanical Engineering
Master of Science
Numerical simulations of particle image velocimetry (PIV) experiments con-
ducted with vortex generating jets (VGJs) on a flat plate, at a Reynolds number
based on plate length of 50,000, were performed for three flow conditions using a
time-accurate hybrid Navier-Stokes solver. Time-averaged steady blowing of angled
jets, subjected to a zero pressure gradient, yielded excellent agreement with the PIV
data in terms of vortex formation and strength. Observed flow features include pri-
mary and secondary vortices, where the primary vortex eventually dominates the
downstream region. A shell wall structure, created by smaller vortical structures sur-
rounding the developing vortices, was also observed. A pulsed jet in a zero pressure
gradient was then initialized from a no-control case. A qualitative comparison be-
tweenaveragedexperimentalandinstantaneousnumericalresultswasperformedwith