碩士 / 國立臺灣大學 / 工程科學及海洋工程學研究所 / 106 / The objective of this thesis is to simulate the acoustic pressure field of a marine propeller. The flow field of a marine propeller is generated by software based on RANS. The method for calculating acoustic pressure used in this thesis is based on Ffowcs Williams-Hawking(FW-H) analogy. The partial differential and integral terms in FW-H acoustic wave equation are substituted with Finite difference method and Numerical integration. Besides, this thesis uses an inviscid flow field function generated by point source to verify the method reliability based on FW-H. When calculating the acoustic pressure of marine propeller, the relationship between sound pressure and distribution of sound source strength is investigated. The difference of sound pressure for far field and near field is discussed.
| Identifer | oai:union.ndltd.org:TW/106NTU05345024 |
| Date | January 2018 |
| Creators | Wen-Yen Hsu, 許文彥 |
| Contributors | Wei-Shien Hwang, 黃維信 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 58 |
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