碩士 / 國立成功大學 / 系統及船舶機電工程學系碩博士班 / 100 / In this project, we use visualization technology and a moving Particle Tracking Velocimetry (PTV) system to measure the flow field near bulbous bow. To save the experiment time, we plan to install a simple wave damping device to shorten during the time interval of experiment in the towing tank.
In this study, we discuss the performance of wave damping device, visualization of ship surface flow field, and the PTV system technology. The mounting and arrangements of all devices were adjustable, such as optical mirror systems, and the particle-seeding device which was fixed in front of the carrier. After trials and errors, a special technique and a standard procedure for conducting experiments are established.
From the wave damping experimental results, we can observe that the damping effect of double lane rope on the speed and wave height is good. It reduced the time interval between two consecutive experiments to about 10 minutes.
From the flow visualization results, we can observe that the result of low towing speed is not very good, but most experiment speeds are above 1m/s. Therefore the current technology is enough for general ship model experiment.
From the PTV results, we observe that the thickness of HID light is still too high. If we want to observe velocity fields around a ship model nearly, we should find the high power the continuous-type laser, with a cylindrical lens to form the light sheet. It can make the particle clear in the image, and the background will not affect the clarity.
| Identifer | oai:union.ndltd.org:TW/100NCKU5345018 |
| Date | January 2012 |
| Creators | Po-ShiungWang, 王柏翔 |
| 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 | 99 |
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