碩士 / 國立臺灣海洋大學 / 系統工程暨造船學系 / 97 / The goal of this thesis is to design an easily installed and reliable system of ducted propeller for the boat speed operated between 25 to 30 knots. The open water test of the system is carried out in NTOU medium-sized cavitation tunnel, to investigate the influence of the nozzle geometry and the pre-swirl stator on the propeller efficiency and cavitation.
From the experimental results, it is shown that the cavitation on the propeller blade and propeller efficiency can be improved by decelerating nozzle. The geometry at leading edge of the nozzle plays an important role for the cavitation control of the nozzle. In order to avoid the strut cavitation, it can be designed to be multiple blades to reduce its thickness. By using the pre-swirl stator to replace the strut, the propeller efficiency can be increased significantly.
| Identifer | oai:union.ndltd.org:TW/097NTOU5345011 |
| Date | January 2009 |
| Creators | Yen-Cheng Lin, 林晏徵 |
| Contributors | Young-Zehr Kehr, 柯永澤 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 77 |
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