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 order to simulate the motion of underwater vehicle, we have to solve the six DOFs equations of motions. Determining the hydrodynamic coefficients in the equations is the most important job before we can solve the equations. However, the hydrodynamic forces vary with vehicle’s outline shape and it will reflect on the hydrodynamic coefficients. In the present study, we establish the method to solve the hydrodynamic coefficients of the underwater vehicle by CFD analysis based on the existing software, i.e. the FLUENT solver.
At first, we will simply describe the related basic hydrodynamic theory and the procedure for the calculation in the present study. Then we illustrate the method to solve all related hydrodynamic coefficients. The previous researched papers by other authors are also quoted here. Adopting the existing body geometry used by other author as the calculation model, we calculate the hydrodynamic coefficients and compare the existing results to verify the validity of the present method used in this paper. In order to ascertain the appropriate number of grid generation, we also make the analysis of grid independence. Finally, the hydrodynamic coefficients of the underwater vehicle including three translational modes and three rotational modes are obtained through the calculations of the forces with respect to each mode. Through the comparisons with the existing experimental data, we found that the results obtained by the present CFD analysis technique are generally acceptable although some improvements are still needed be done in the future.
| Identifer | oai:union.ndltd.org:TW/100NCKU5345023 |
| Date | January 2012 |
| Creators | Chen-WeiLu, 呂振維 |
| Contributors | Ming-Chung Fang, 方銘川 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 80 |
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