碩士 / 國立臺灣海洋大學 / 輪機工程學系 / 106 / The main purpose of this paper is to design an underwater vehicle with
minimum resistance within a specific water displacement, and to discuss the
characteristics of resistance and flow field generated by the designed hull
geometry model. The design method mainly adapts Virginia Tech Team3
method, which including MATLAB method of programming objective function,
constrains of design parameter, and calculate for optimal hull shape with
minimum resistance. Then using the ANSYS Fluentr software to simulate
and derive the resistance value. Finally, making comparison of resistance
simulated from ANSYS with the theoretical resistance calculated from MATLAB.
In order to verify the feasibility of the numerical simulation method, firstly,
taking the SUBOFF submarine experimental model of the United States Defense
Advanced Research Program (DARPA) as sampling and numerically
simulates on both bare hull model and hull model with appendages. At the
same setting of experiment environmental parameters (e.g. ship speed, fluid
density and viscosity etc.), derived the simulation data. The comparison of
results show that the difference between simulation and experimental measurement
is very small. In addition, the resistance of numerically simulated
and MATLAB predicted to the hull of optimization are also very similar. This
fully proves that the numerical simulation method is applicable to use.
Finally, using the same numerical simulation methodology onto the bare
hull and the hull with appendages of the designed optimal model. The appendages
of sub-hull includes sub-sail (NACA20, Akula) and sub-stern (cross
type, X-type), respectively. The simulation results on bare hull show that the
resistance of designed optimal model is far lower than the SUBOFF model.
And simulation result on designed optimal model with different appendages is that the resistance of NACA20 sub-sail configuring with cross-type substern
is far lower than Akula sub-sail configuring with X-type sub-stern.
| Identifer | oai:union.ndltd.org:TW/106NTOU5484019 |
| Date | January 2018 |
| Creators | Chiu, Sheng-JI, 邱勝吉 |
| Contributors | Tsai, Shun-Feng, 蔡順峯 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 48 |
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