碩士 / 國立成功大學 / 系統及船舶機電工程學系碩博士班 / 100 / Bubbles have been proven to be a successful noise-reducing technique for ships. Although numerous researches discuss the masker’s acoustics, the flow field measurement is scant of open literatures, and most of the dissertation use the acoustic method to find out the bubble diameters of masker. In this research, we observe the flow field, and use the underwater photo technique to observe the motion of underwater bubbles.
A ship model is used in this research: fitting to real ship from geometry and performance, using Rhino to fit ship’s geometry, and use orca3D to fit ship’s performance. And then, we simulate the wake by ShipFlow. We design propeller, using simulated wake data and ship’s data by Openprep.
We observed bubble motion by particle tracking velocimetry (PTV) , and observed bubble shapes by camera. In the experiment, we found that when the ship speeds up, the bubble diameter will become smaller.
| Identifer | oai:union.ndltd.org:TW/100NCKU5345044 |
| Date | January 2012 |
| Creators | Ching-HuiHwung, 黃景暉 |
| Contributors | Jeng-Horng Chen, 陳政宏 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 140 |
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