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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/50333

Authors: Yaw-Huei Lee
Yi-Chih Chow
Yu-Chi Chang
Contributors: 國立臺灣海洋大學:系統工程暨造船學系
Keywords: marine propeller
open-water test
phase-locked imaging
image processing and analysis
Date: 2017-04
Issue Date: 2018-10-04T03:38:56Z
Publisher: Journal of Marine Science and Technology-Taiwan
Abstract: Abstract: Cavitations associated with marine propellers have been a
major issue in naval architecture and marine propulsion. Among
them, sheet and bubble cavitations are especially impactful in
ship propulsion, structural vibration and noise, and propeller
damage. Even though numerical simulations are becoming more
and more powerful in computing complex flows like cavitating
propeller flows, their modelings and resulting data still need to
be validated by experiments. Due to the fact that most of the experimental
methods for cavitations of marine propellers are only
qualitative, this paper develops a quantitative image-based method
to extract from cavitation images data useful to the validations
of the numerical results. The experimental methodology
and setup consist of a phase-locked imaging system incorporated
with a dynamometer installed in a cavitation tunnel. Series of
images at the same phase for unsteady and quasi-steady sheet
cavitations, and bubble cavitation are acquired and then processed
and analyzed with different algorisms and procedures
developed in light of the respective characteristics of these cavitations.
The experimental data provide not only quantitative
comparisons, validations, and even calibrations to the numerical
modelings and results, but also physical insights such as the
correlation of sheet cavitation with propeller dynamics.
Relation: 25(2) pp.158-165
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/50333
Appears in Collections:[系統工程暨造船學系] 期刊論文

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