碩士 / 國立成功大學 / 系統及船舶機電工程學系 / 102 / The masker system has been used quite broadly. In recent years, it is important to reduce the noise by the masker belts in anti-submarine warfare(ASW). There are many papers discussing the acoustic effects of the masker belts, as opposed to the masker belts in flow visualization. Public papers are less and focus more on contents the acoustic characteristics of bubble related to the bubble size of the masker belts. We set three bubble belts with five release conditions. The present study uses underwater photography to observe the flow field of masker belts. The bubbles-covering situation is observed from the side of the ship model. Different gases, like carbon dioxide and air, are used to generate bubble for comparisons.
Experimental results show that when ship speed is faster, the bubbles generated will be smaller. Different gases, have no significant effect on bubbles size in this experiment. Because even carbon dioxide is more soluble in water, the ship model draft is only twenty centimeters, such that gas has too short time in the water and the effect of solution is less then effect of bubble rising.
| Identifer | oai:union.ndltd.org:TW/102NCKU5345006 |
| Date | January 2014 |
| Creators | Yu-PoWang, 王昱博 |
| Contributors | Jheng-Hong 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 | 100 |
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