FEASIBILITY OF USING EXPERIMENTAL LOAD MEASUREMENTS ON A CYLINDER TO PERFORM PHASE-SENSITIVITY ANALYSIS IN THREE-DIMENSIONAL FLOWS
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Authors
Plickys, Ryan W.
Subjects
phase-reduction analysis
wake shedding
wake synchronization
vortex-induced vibration
shedding frequency
three-dimensional flows
phase offset analysis
wake shedding
wake synchronization
vortex-induced vibration
shedding frequency
three-dimensional flows
phase offset analysis
Advisors
Klamo, Joseph T.
Taira, Kunihiko, UCLA
Date of Issue
2024-06
Date
Publisher
Monterey, CA; Naval Postgraduate School
Language
Abstract
The goal of this study was to evaluate the feasibility of addressing problems caused by three-dimensional vortical wakes when performing phase reduction analysis by using experimental direct load measurements on a cylinder. The outcome of this study is the validation of a method to use load measurements on a cylinder due to wake shedding to measure phase offset jumps and generate phase-sensitivity functions. Experimental data was collected using a recirculating water tunnel, custom translating test fixture, and load cell at the Naval Postgraduate School. Analysis of this data utilizes custom written MATLAB scripts to discern phase offset jumps from multiple trials for two different test conditions. Phase offset jumps and the location along a shedding cycle when the impulse occurred were used to generate phase-sensitivity functions for the two test cases. The study showed promising results and has proven the feasibility of using load cell measurements on a cylinder to create phase sensitivity functions for prediction of wake synchronization regions.
Type
Thesis
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Sponsors
National Science Foundation, Alexandria, VA 22314
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Distribution Statement
Distribution Statement A. Approved for public release: Distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.