Prediction of Loading Distribution and Hydrodynamic Measurements for Propeller Blades in a Rim Driven Thruster

Cao, Qing-ming; Hong, Fang-wen; Tang, Denghai; Fanglin, Hu; Lu, Linzhang

doi:10.1016/s1001-6058(11)60218-7

Cited by 47 publications

(24 citation statements)

References 4 publications

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“…Cao et al (2012) simulated a rim driven thruster using RANS, combined with analytical models to describe the torque production of the TaylorCouette flow in the gap between the rim and duct. This is a large source of losses in rim driven thrusters, contributing to 27% of the total torque in the work of Cao et al (2012), although the simulation was simplified through the use of discrete analytical models for the torque. The rim drive thruster studied by Cao et al differs from the present one by being both hubless and statorless.…”

Section: Introductionmentioning

confidence: 99%

“…A similar modelling method to that of Cao et al (2012) is used in the present work, excluding the rim gap from the CFD and instead modelling its effects analytically, but this geometry also requires simulation of the rotor-stator interaction. To investigate improving the capture of rotor-stator interaction, this work uses two methods, one steady-state and one time-varying, and compares the effect of rotor-stator interaction between the two methods.…”

Section: Introductionmentioning

confidence: 99%

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Numerical modelling of rotor–stator interaction in rim driven thrusters

2015

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An electric rim driven thruster is a relatively new marine propulsion device and the associated fluid dynamics have not been fully investigated. This work develops a robust CFD method and investigates both frozen rotor and unsteady simulations of rotor-stator interaction.Two solvers from OpenFOAM were used. Steady state simulations were performed using MRFSimpleFoam with a frozen rotor treatment of the interface between static and rotational reference frames. The solver for unsteady simulations was pimpleDyMFoam, utilising a sliding mesh interface to handle the dynamic meshing. Both methods are thoroughly verified and validated against experimental data. The k-omega SST turbulence model is found to be robust down to low advance ratios.For the rim driven thruster, analytical models are used to estimate friction forces in the rim gap and their contribution to torque losses. The frozen rotor and unsteady treatments of rotor-stator interaction are compared and found to have similar trends in the variation of thrust produced. However, the frozen rotor method does not predict the same variation of instantaneous torque and does not capture the rotor-stator interaction fully. Analysis of the unsteady rotor-stator interaction shows an oscillating flow over the stators and thus inflow to the blades. Keywords:Frozen Rotor, Unsteady, Numerical, CFD, Thruster, Rim Driven

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical modelling of rotor–stator interaction in rim driven thrusters

2015

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“…Reduction in secondary systems [120] The design also allows for the motor to be cooled, as the motor parts that are susceptible to heating have short thermal paths to the cooling water. Recently, rim driven thrusters have been developed by the University of Southampton [118,121] which TSL Technology Ltd. have a licence to produce commercially [122].…”

Section: Thrustmentioning

confidence: 99%

Inspection-Class Remotely Operated Vehicles—A Review

Capocci

Dooly

Omerdić

et al. 2017

JMSE

181

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This paper presents a review of inspection-class Remotely Operated Vehicles (ROVs). The review divides the classification of inspection-class ROVs; categorising the vehicles in order of size and capability. A state of the art technology review is undertaken, discussing various common subsystems of the ROV. Standard and novel ROV shapes and designs are reviewed, with emphasis on buoyancy, frame materials and hydrodynamics. Several power considerations and designs are discussed, accounting for battery fed and mains fed systems. ROV telemetry is split into a discussion on the various transmission hardware systems and the communication protocols that are most widely used in industry and research today. A range of thruster technologies is then introduced with consideration taken of the various thruster architectures available. Finally, the navigation and positioning sensors employed for ROV navigation and control are reviewed. The author has also created a number of comparison tables throughout the review; tables include comparison of wired data transmission technology, comparison of common ROV communication protocols and comparisons of various inertial navigation systems. By the end of the review the reader will have clearer understanding on the fundamentals of inspection-class ROV technologies and can use this as an introduction to further paper investigation.

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“…The thruster motor and propulsor are usually separate structures, and power is delivered to the propulsor from the thruster motor via a transmission shaft. The IMP has many advantages when compared with the conventional propulsion system, such as less space occupation, greater power density, higher reliability, and better flexibility, so IMP will contribute to improving the dynamic performance of ships or underwater vehicles [2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Analytical design of the integrated motor used in a hubless rim‐driven propulsor

Cheng

Pan

Cao

2019

IET Electric Power Applications

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The rim-driven integrated motor propulsor (IMP) has received much attention in recent years, owing to its superiority in flexibility, reliability, and space occupation. For this propulsion system, radially thin motors with high torque and large air gaps are essential. Two-segment Halbach array permanent magnets with unequal segment-arc are adopted to enable a thin rotor and a large air gap. The general analytical solution of the magnetic field is presented. Based on the analytical calculation of the Halbach motor performance, the necessity of the rotor core was discussed, and the Halbach array was optimised with an analytical method to maximise the electromagnetic torque. This study also tried and compared three designs of the integrated motor stator to further reduce the radial thickness, and the slotted stator proved more reasonable. The fabrication of an IMP prototype was completed, and the experimental data of the integrated motor are presented and compared with the calculated results. This study also conducted the water tunnel experiment of the IMP prototype to test the integrated motor performance in the overall IMP system. The measured rotational speed and output thrust are less than expected, so the friction loss in the IMP gap flow field is calculated and analysed.

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Prediction of Loading Distribution and Hydrodynamic Measurements for Propeller Blades in a Rim Driven Thruster

Cited by 47 publications

References 4 publications

Numerical modelling of rotor–stator interaction in rim driven thrusters

Numerical modelling of rotor–stator interaction in rim driven thrusters

Inspection-Class Remotely Operated Vehicles—A Review

Analytical design of the integrated motor used in a hubless rim‐driven propulsor

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