| DOI | Resolve DOI: https://doi.org/10.5750/ijme.v155iA4.909 |
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| Author | Search for: Islam, M.ORCID identifier: https://orcid.org/0000-0002-2129-5333; Search for: Akinturk, A.; Search for: Veitch, B.ORCID identifier: https://orcid.org/0000-0001-5450-4587; Search for: Liu, Pengfei1 |
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| Affiliation | - National Research Council of Canada. Ocean, Coastal and River Engineering
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| Format | Text, Article |
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| Subject | cavitation characteristics; cavitation conditions; operating condition; performance characteristics; podded propulsors; propulsive performance; thrust and torques; uncertainty; dynamometers; experiments; Reynolds Number; uncertainty analysis; propellers; Reynolds Number Assessment; azimuthing; cavitating; effect of sizes; four-quadrant; open water; water conditions |
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| Abstract | This paper presents the outcome of a research to evaluate the effect of size on the propulsive performance of podded propulsors in cavitating and non-cavitating open water conditions. Two cases are examined, namely: propeller-only case and pod-unit case. In the propeller-only case, a commercial propeller dynamometer is used to measure the thrust and torque of two propellers of different size at the four quadrants of propellers with varied shaft and flow speeds. Also, both propellers are tested at different tunnel pressure to study and compare the behaviour under similar cavitation conditions. In the pod-unit case, two geometrically similar but different sized pod-units are tested using two separate custom-made pod dynamometer systems in two towing tank facilities in straight-ahead and static azimuthing conditions. The study showed that the performance characteristics stabilize at lower Reynolds Number for the smaller propeller than the larger propeller. The propulsive performance of the two propellers was comparable in the four-quadrant experiments. Also, the experiments at the cavitating conditions showed that the cavitation characteristics of the two propellers were consistent at corresponding operating conditions. The experiment results of the two pod-units were also comparable for forces and moments in the three coordinate directions in the straight-ahead and static azimuthing conditions. A brief discussion on the uncertainty assessments for each of the measurements is also presented. |
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| Publication date | 2013-12 |
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| Publisher | University of Buckingham Press
Royal Institution of Naval Architects |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 7be14f9c-a585-4f8d-840f-45577e6b4e87 |
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| Record created | 2025-06-11 |
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| Record modified | 2025-06-11 |
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