Abstract
This paper presents a method for estimating the propulsion performance and efficiency of an AUV thruster based on CFD (Computer Fluid Dynamics) analysis. A discussion of the factors influencing the numerical simulation accuracy and convergence rate, namely the number, size, and type of mesh elements required to describe each part of the model, is presented. The axial symmetry characteristics of the propeller, nozzle and the encompassing MRF (Moving Reference Frame) region have been used to reduce complexity and hence computation time. The paper, then, describes a method for estimating the motor horsepower and RPM of an AUV thruster based on simulated resistance tests and propeller open water (POW) tests. The engine horsepower for an AUV equipped with a ducted propeller and RPM is evaluated from the speed-power curve. The effectiveness of the ducted propeller is studied by comparing the performance characteristics for test results obtained without the nozzle versus those obtained for a range of nozzle shapes. The best design of the nozzle shape is finally determined from speed-power curves of the given duct.
| Original language | English |
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| Pages | 435-442 |
| Number of pages | 8 |
| Publication status | Published - 10 Sept 2010 |
| Event | International Society of Offshore and Polar Engineering - Duration: 20 Jun 2010 → … |
Conference
| Conference | International Society of Offshore and Polar Engineering |
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| Period | 20/06/10 → … |
Keywords
- AUV (autonomous underwater vehicle)
- CFD (computational fluid dynamics)
- Nozzle propeller
- Propeller open water test
- Self propulsion test