| Summary: | 碩士 === 國立成功大學 === 系統及船舶機電工程學系碩博士班 === 95 === The Hubless Rim-Driven Propulsor is an extention of brushless PM motor in recent years. Because its good performance, it is very suitable for small remotely operated vehicles. In the design and development process, because it’s flow field includes some complicated phenomena like vortex and turbulence, it needs some simulation or experiment to correct designed geometry in order to reach the goal.
In this study, we discuss the Hubless Rim-Driven Propulsor’s flow field at varying inflow velocities (1m/s, 2m/s, 3m/s) and propeller rotation rates (1000rpm, 1500rpm, 2000rpm), by the commercial computational fluid dynamics software, STAR-CD, which simulates the flow field of the propulsor. We compare some performances like the flow field of propulsor, blade circulation, vorticity, and thrust-torque between different cases with the result of a lifting-line design program, MIT-PLL. We found that the best propulsor’s efficiency occurred at 2m/s inflow velocity and 2000rpm rotation rate. And the thrust by simulation is less than the result of design program at the same design condition, not as good as expected. The reason includes the change of blade geometry, duct design not integrated with blade, and the limits of lifting line design process.
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