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| Prediction of hydrodynamic characteristics and flow noise of ducted controllable pitch propeller in bollard condition |
| Received:March 11, 2016 Revised:April 24, 2016 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx201703014 |
| KeyWord:ducted controllable propeller computational fluid dynamics(CFD) bollard flow noise numerical prediction |
| Author | Institution |
| 彭云龙 |
海军工程大学 动力工程学院, 武汉 |
| 王永生 |
海军工程大学 动力工程学院, 武汉 |
| 刘强 |
海军工程大学 动力工程学院, 武汉 |
| 易文彬 |
海军工程大学 动力工程学院, 武汉 |
| 刘承江 |
海军工程大学 动力工程学院, 武汉 |
| 魏应三 |
海军工程大学 动力工程学院, 武汉 |
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| Abstract: |
| Hydrodynamic characteristics of a ducted propeller under designed pitch and bollard pitch were predicted by validated computational fluid dynamic method.Flow noise of the ducted propeller mounted on a ship in bollard condition was also analyzed. Due to the pump suction effect,there was inverse flow around the outside of the duct in bollard condition,and the wake field was turbulent and the proportion of propeller's thrust and duct's was 1.2:1. The results showed that acoustic source intensity of different ducted propeller parts decreased from blade passing frequency (BPF) to 4BPF,and the highest amplitude occurred on blade leading edge and duct inner side; the far field acoustic source intensity line in frequency of axial test point reflected the ducted propeller inflow field characteristics.Analyzing the directivity of wideband sound source level (SSL) of ducted propeller and its components,it was discovered the rotary parts which contained blades and hub made large contribution to the total SSL,while the other stationary parts contributed to radial test point SSL. |
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