Numerical modelling of rotor–stator interaction in rim driven thrusters

Dubas, Aleksander; Bressloff, Neil W.; Sharkh, Suleiman M.

doi:10.1016/j.oceaneng.2015.07.012

Cited by 52 publications

(23 citation statements)

References 10 publications

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“…During our pre-study, it was found that the wake flow characteristics of the ducted propellers calculated in a cylindrical outer domain were the same as those obtained from a rectangular one. Therefore, a rectangular outer fluid domain was adopted, which is same as those in Dubas et al (2015), Hu et al (2019) and Jang et al (2020). Diameter of the rotating domain is 1.0 D .…”

Section: Numerical Settingsmentioning

confidence: 99%

Effect of ducts on the hydrodynamic performance of marine propellers

Liu

Gong

Bian

et al. 2021

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PurposeHydrodynamic forces and efficiency of bare propeller and ducted propellers with a wide range of advance ratio (J) and attack angle (θ) are examined. The thrust and torque coefficients and the efficiency are presented and discussed in detail. The present results give a reliable guidance to the improvement of the hydrodynamic characteristics of ducted propellers.Design/methodology/approachThe effect of a duct on the hydrodynamic performance of the KP458 propeller is numerically investigated in this study. Finite volume method (FVM)-based simulations are performed for a wide range of advance ratio J (0 ≤ J ≤ 0.75) and attack angle θ of the duct (15° ≤ θ ≤ 45°). A cubic computational domain is employed in this study, and the moving reference frame (MRF) approach is adopted to handle the rotation of the propeller. Turbulence is accounted for with the RNG k-ε model. The present numerical results are first compared against available experimental data and a good agreement is achieved.FindingsThe simulation results demonstrate that the hydrodynamic forces and efficiency increases and decreases with J, respectively, at the same attack angle. In addition, it is demonstrated that the hydrodynamic forces and efficiency are both improved due to the presence of the duct, which eventually leads a better hydrodynamic performance at high advance ratios. It is further revealed that as the attack angle increases, the pressure difference between the suction- and pressure-surfaces of the propeller is also augmented, which results in a larger thrust. The wake field is more uniform at θ = 30°, suggesting that a higher efficiency can be obtained.Originality/valueThe present study aims to investigate the effect of a duct on the KP458 propeller subjected to uniform inbound flow. The relationship between the uniform incoming flow and the attack angle of the duct is mainly focused, and the design of the ducted propellers for any ship hull can be improved according to this relationship.

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Section: Numerical Settingsmentioning

confidence: 99%

Effect of ducts on the hydrodynamic performance of marine propellers

Liu

Gong

Bian

et al. 2021

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“…The SST turbulent flow model was used by Andersen to simulate the performance of the axial water jet pump, which revealed the inner flow structure of the passage [7,21,22]. Aleksander applied several turbulent models in the research of rotor-stator interaction in rim driven thrusters, and the SST model was found to have high relevance with experimental results, and was also more robust for solving low advance ratios [23]. Therefore, the numerical simulation for rim driven propulsion is an effective method used to study its performance and the SST turbulence flow model is suitable for the study of the rim driven propulsion pump.…”

Section: Introductionmentioning

confidence: 99%

Experimental Research and Numerical Analysis of Pressure Fluctuation Characteristics of Rim Driven Propulsion Pump Outlet

Zhu

Liu

2021

Machines

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The pressure fluctuation characteristics of a rim driven propulsion pump are studied by an experimental method firstly, and then its unsteady inner flow is studied by numerical simulation to reveal the generating mechanism of the pressure fluctuation. In the experiment, a monitoring point was set in a downstream region with a distance of 1D (D, Diameter of impeller) to the impeller. The monitoring point’s dominant frequencies within a low frequency band are 1APF (APF, Axial Passing Frequency) and 2APF. In the numerical simulation, the main fluctuation near the impeller region appears at 1BPF (BPF, Blade Passing Frequency) and as the monitoring point moves downstream, the amplitude becomes smaller. The 1BPF fluctuation nearly disappears when the distance exceeds 1D, and the main frequency moves to 1APF and 2APF, which is in good agreement with the experimental results in the low frequency band. The transient velocity, pressure and vorticity distribution were studied to reveal the causes of 1BPF, 1APF and 2APF fluctuation. The main cause of 1BPF is the jet from the tail of the blade and the main cause of 2APF is the movement of a large-scale double vortex structure on both sides of the low-pressure zone. The movement of the vortex group near the wall may be the main cause that induces the 1APF fluctuation.

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“…Huyer et al (2010) used the commercial software FLUENT to calculate and discuss the influence of the duct geometry, front stator and rotor on the open-water performance of the RDT [3] . Dubas et al (2015) calculated the influence of the gap between the stator and the blade on the torque in OpenFoam by using the transient solver with experiment validation [4] . It was found that the SST k-ω turbulence model is more suitable to capture the flow separation at low advanced velocities while the RNG k-ε turbulence model is better at high advanced velocities.…”

Section: Introductionmentioning

confidence: 99%

Numerical Prediction of Cavitation Performance for Rim Driven Thruster

Zhang

et al. 2018

Proceedings of the 10th International Symposium on Cavitation (CAV2018)

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The open-water characteristics and cavitation behavior of a rim-driven thruster (RDT) are examined by using the Reynolds-averaged Navier-Stokes (RANS) method. The total thrust coefficients and torque coefficients calculated by RANS solver with the SST k-ω turbulence model show relatively better agreement with the experimental data than other two-equation turbulence models. The cavitation behavior of the RDT with a cavitation number of σn=3.0 in uniform and non-uniform flow are then separately explored by using the tow-phase RANS method with the SST k-ω turbulence model and the Schnerr-sauer cavitation model, as well as the sliding mesh technique. It can be observed that a sheet cavitation occurs on the suction side of the blades, occupying almost 35% blade area, and kind of cloudy structures are captured to be shed from the sheet cavity for the RDT in uniform flow. Whereas, the sheet cavitation is observed to take up more than 50% blade area for the RDT in a 'Triple Peak' wake field.

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Numerical modelling of rotor–stator interaction in rim driven thrusters

Cited by 52 publications

References 10 publications

Effect of ducts on the hydrodynamic performance of marine propellers

Effect of ducts on the hydrodynamic performance of marine propellers

Experimental Research and Numerical Analysis of Pressure Fluctuation Characteristics of Rim Driven Propulsion Pump Outlet

Numerical Prediction of Cavitation Performance for Rim Driven Thruster

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