Distributed Computations of the Viscous Flow Filed Around Multi-component Propulsors
碩士 === 國立海洋大學 === 系統工程暨造船學系 === 88 === The purpose of this thesis is to use the finite volume method instead of the previously used finite analytical method in the coupled viscous / potential flow computations. The “equivalent body force” concept is still adopted to transfer the propeller force betw...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2000
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| Online Access: | http://ndltd.ncl.edu.tw/handle/52524824071240566963 |
| Summary: | 碩士 === 國立海洋大學 === 系統工程暨造船學系 === 88 === The purpose of this thesis is to use the finite volume method instead of the previously used finite analytical method in the coupled viscous / potential flow computations. The “equivalent body force” concept is still adopted to transfer the propeller force between the viscous flow and the potential flow calculations. Under this concept, using the finite volume method does have more physical meaning in the numerical procedure since it uses the discrete volume concept. The application of this method is also expanded from the interaction between a ship hull/axis-symmetric body and a single propeller to the interaction between an axis-symmetric body and multi-component propulsors. A multi-time step method for the viscous program is developed and established on a distributed computing system to improve the efficiency of the viscous flow calculations. Numerical results show that the “equivalent body force” concept has been successfully applied to the finite volume method, and the interaction between an axis-symmetric body and multi-component propulsors can be accurately calculated by this coupled method. The efficiency gain by using the multi-time step method and the distributed computing system is also demonstrated in this thesis.
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