Blade camber was set to zero for symmetric port and starboard thruster performance. Preliminary applications can be recognized in some ussr ships of half the past century, but only recently, thanks to the availability of materials and innovative manufacturing technologies, such. Pdf the use of duct in propeller is one of the breakthrough in the development of the propeller. As a consequence, a coupled multiphysic model for the design of this machine seems essential. Jul 03, 2015 flow visualisation of the oscillating flow past the front stators in a rim driven thruster. Schottel is a manufacturer of propulsion and steering systems for ships and offshore applications.
Thrusters with rim driven propellers have been known for a long time. Conventional propellers need a shaft line which is driven by a turbine, a diesel engine or an electric motor. There are a variety of different types of marine thrusters and each of them plays a huge role in the maritime industry. Silentdynamics customized rimthrusterbased propulsion solutions applications include tunnel thrusters, and silentdynamics ert thrusters can be configured to be retractable andor azimuthing. Depending on the field of application and size, the thrusters offer a rated power of 200 800 kw and. Safety and the wellbeing of our employees and customers has high focus at brunvoll. Numerical design and experimental verification of a rim. Blades the fixed pitch thruster blades of the propeller are made from bronze, highly resistant to cavitation and suitable for iceclass. The products are based on many years of experience with building products for the demanding subsea industry. Diskdrive is an ultraslim 15 mm thickness rimdriven brushless thruster with and without integrated motor control. The strength analysis of blading system under design was carried out and cavitation characteristics.
Basic asd manoeuvring bow thruster maintenance part 1 flowserve thruster flowserve pleuger azimuth thruster with tilted axis for. Rim driven thruster how is rim driven thruster abbreviated. Marine thrusters come in many different shapes and sizes for example screw propellers, voithschneider propellers, waterjets, ducted propellers, tunnel bow thrusters, and stern thrusters, azimuth thrusters, rim driven thrusters, rov and submersible drive units but the thing that ties them all to the same title is their basic function and. This works as a tunnel thruster in upper position, and as an azimuth thruster in lower position. Rim driven propulsors could come to play an important role in the propulsion of future electric ships. In addition to the less occupied space, the typical configuration of rim driven thruster would bring advantages of the reduction of noise and vibration, as well as efficient manoeuvring. Computational fluid dynamics simulation of a rim driven thruster aleksander j dubas, n.
Sharkh university of southampton abstract an electric rim driven thruster is a relatively new marine propulsion device that uses a motor in its casing to drive a propeller by its rim and the uid dynamics associated. The design of a linestart rim driven induction motor specifically for use in a marine propulsor thruster is described. Rating is available when the video has been rented. Rimdriven thruster, auv, free surface, waves 1 introduction flight style autonomous underwater vehicles auvs, such as the remus 100 and autosub6000, are ideally suited to performing high speed missions 1ms, requiring the vehicle to survey large areas of the seabed mcphail et al 2010. The products are based on many years of experience with building. Conventional propellers need a shaft line driven by a turbine. Rimdriven propulsion is an emerging technology offering higher controllability, efficiency. The rim driven thrusters rdt have been designed both in hubtype and hubless type, but few comparison studies have been performed. A coupled electromagnetic hydrodynamic model for the.
Manoeuvring thruster bow thruster or stern thruster is a transversal propulsion device built into, or mounted to, either the bow or stern, of a ship or boat to make it more manoeuvrable. Performance prediction of a cavitating rim driven tunnel thruster. Due to high power consumption the idea was ultimately set aside. Maritime propulsion new rim thruster from schottel. Rim thruster series reduced noise and vibration, high efficiency as well as savings in space and weight are important thruster requirements. A rim driven thruster comprises an annular housing, a propulsor assembly, a magnetic rotor assembly and a transverse flux stator assembly. This unique feature of the rim driven thruster reduces maintenance costs dramatically and makes the investment worthwhile.
The electrical rimdriven thruster consist of an electric torque motor, which drives an inside propeller. This paper explores the use of a hybrid canned induction rotor design in which a conventional deepbar cage is replaced by a simple cage with a low radial depth, along with a series of airgap cans to provide environmental shielding, and a conducting rotor can to simplify. Numerical design of a rimdriven thruster using a ransbased. Rim driven thruster is a relatively new thruster which integrates the propeller and the motor system together so that there is no need for the central shaft. The schottel rim thruster is a quiet, space and weightsaving drive. Initial published research, based on a scaled cruiseship model, estimated that an efficiency improvement in the order of 7% was achievable. Diskdrive is an ultraslim 15 mm thickness rim driven brushless thruster with and without integrated motor control. Us20120148424a1 us303,753 us2011303753a us2012148424a1 us 20120148424 a1 us20120148424 a1 us 20120148424a1 us 2011303753 a us2011303753 a us 2011303753a us 2012148424 a1 us2012148424 a1 us 2012148424a1 authority us united states prior art keywords rotor electrical machine rim driven circumferential stator prior art date 20100810 legal status the.
Design and performance of an electric tip driven thruster s m abu sharkh, s r turnock, and a w hughes proceedings of the institution of mechanical engineers, part m. The rimdriven thruster is made of two main subsystems the propeller and the electrical machine that are closely related. Open water performance comparison between hubtype and. The performance of vertical tunnel thrusters on an autonomous. Design and performance of an electric tipdriven thruster. Copenhagen subsea as electric subsea thrusters home. This paper presents the results of a design and experimental verification of rimdriven thruster blading system.
Simulationdriven design of a rim drive for an autonomous vehicle. A marine thruster is a device for producing directed hydrodynamic thrust mounted and implemented on different parts of a marine vehicle, primarily for maneuvering or propulsion azimuth thrusters kongsberg. A rimdriven thruster is a marine propeller that doesnt need a hub for transmission of the driving torque. Prediction of hydrodynamic performance for rimdriven thruster. This paper gives a description of two hydrodynamics and electromagnetic thermal models as well as the way to couple them. Design and optimization of a hubless rimdriven thruster for an. The voith inline thruster vit and the voith inline propulsor vip, a revolutionary thruster concept. Interestingly it appears as though the relatively new permanent magnet electric motor technology has driven this new interest in rim drive propulsion. The propeller is driven without contact between the encapsulated winding and the rotor through water. This is from my phd work, supported in no small part by tsl technology ltd and funded by the epsrc. Schottel answers these needs with its ecofriendly electric rim driven thrusters in four sizes. Schottel answers these needs with its ecofriendly electric rimdriven thrusters in four sizes. Pdf on jun 10, 2018, qingming cao and others published rim driven thruster find, read and cite all the research you need on researchgate. Journal of engineering for the maritime environment 2003 217.
We have single and multichannel controllers suitable for battery operation of the smaller units. Keywords rim driven thruster, simulation driven design sdd, autonomous surface vehicle, computer. Us8299669b2 rim driven thruster having transverse flux. This paper presents the results of a design and experimental verification of rim driven thruster blading system. Schottel answers these needs with its ecofriendly electric rimdriven thrusters in. Rim driven thrusters represent one of the most innovative propulsive concepts of the last years, even if the idea of driving a propeller via its blade tips dates back to the work of. Pdf numerical design and experimental verification of a rim. Marinich 1 1krylov shipbuilding research institute ksri, st.
The blades of a rimdriven thruster are mounted on a. The structure is enhanced by use of buoyant solid materials so weight in water is very low. The propeller is directly connected to the rotor houses. A rim driven electrical machine for interaction with a flow of water, comprising. The optimization framework consists of a parametric description of the rim blade geometry and a multiobjective optimization algorithm which makes. These marine thrusters integrate the electric motor into the duct around the propeller, resulting in an optimally efficient combination of hightorque motor and fully symmetric thrust.
Marine thrusters come in many different shapes and sizes for. Building a rimdrive thruster system that offers the ultimate in. Design and performance of an electric tipdriven thruster s m abu sharkh, s r turnock, and a w hughes proceedings of the institution of mechanical engineers, part m. Rimdriven thruster technology has emerged and demonstrated potential for compact and supersilent maneuvering propulsion. This configuration allows very efficient, along with the special power electronics precisely controllable relapses, at a very high efficiency. A simulationbased design optimization sbdo tool is proposed for the design of rim driven thrusters. Flow visualisation of the oscillating flow past the front stators in a rim driven thruster.
The annular housing defines a flow path extending along an axis. Deepsea tidal generator and positioning thruster 1. Computational fluid dynamics simulation of a rim driven. Vetus rimdrive thruster rd125 electric bow thrusters. The strength analysis of blading system under design was carried out and cavitation characteristics were estimated. Keywords rimdriven thruster, simulationdriven design sdd, autonomous surface vehicle, computer. One key area of interest is the potential impact of rdps on hydrodynamic efficiency. Rim driven thruster technology has emerged and demonstrated potential for compact and supersilent maneuvering propulsion. Optimization, rimdriven thruster rdt, computational fluid. Analysis and optimization of the electromagnetic performance of a. Performance analysis rim driven propeller as a propulsor using open water test. The thruster is designed to be used in water depths up to 6,000 m.
Figure 1 shows an inverter fed rimdriven marine thruster. The rimdriven thruster concept offers the low noise emissions and compact dimensions achieved by utilizing carbonfiber blades, waterlubricated hydrodynamic bearings and a hubless propeller. Rim driven retractable thruster design 6 propeller testing rig 7 7 blade element theory airfoil evaluation 8 8 actual and theoretical prop thrust production 11 9 graupner hub driven propeller12 10 thrust production and power consumption of a graupner hub driven propeller 11 large blade rim driven. Building a rim drive thruster system that offers the ultimate in comfort without compromise in performance is our driving motivation. The hubless propeller prevents it from getting tangled. Secondly a ring mounted around the propeller, prevents the propeller from cavitating. Rim driven thruster, auv, free surface, waves 1 introduction flight style autonomous underwater vehicles auvs, such as the remus 100 and autosub6000, are ideally suited to performing high speed missions 1ms, requiring the vehicle to survey large areas of the seabed mcphail et al 2010. Rim driven propellers rdp or rim drive propulsers and thrusters rim drive propellers or rim driven propulsers and thrusters voith rdp. Steven fletcher and robert hayes, engineers at frazernash consultancy, present the technologys pros and cons and discuss the form future adoption may take for large commercial ships. Copenhagen subsea as is a newly created company with the purpose of bringing a range of innovative products to the subsea industry.
Pdf numerical design and experimental verification of a. Electric rim thruster technology the basic unit of the ert electric rim thruster is an permanent magnetic synchronous ring motor pmsm which is stepless controllable by a frequency converter. The design of a linestart rimdriven induction motor specifically for use in a marine propulsorthruster is described. A rimdriven thruster integrates the propeller with the electrical machine that is driving it by mounting the motor directly around the outside of the propeller. Petersburg, russia abstract this paper presents the results of a design and experimental verification of rim driven thruster blading system. First ship with azimuth rim driven thrusterspropulsion the mf eiksund, a roro car and passenger ferry of loa 160 ft 49 m, beam 34. Technology trends and challenges for superconductor.
A rim driven thruster rdt is an integrated deepsea motor thruster that has been widely studied. However, only in recent years have such thrusters come into wide use. The propeller forms the rotating part of the electric motor rotor and the fixed winding stator is mounted in the tunnel. The second half of the paper discusses the design of the. This paper investigates the difference between open water performance of hubtype and hubless rdt by means of computational fluid dynamics cfd analysis. Design of supplementary thrusting unit for a miniature. The rim driven thruster is a marine propeller which does not need a hub for transmission of the driving torque. Flow past stators in a rim driven thruster youtube. China claims rimdriven thrusters will make its new. This paper applied rans solver and angular momentum current analyzing method to study the effect of gap flow in a rim driven thruster on the torque of the blades when the propeller was replaced by. Interestingly it appears as though the relatively new permanent magnet electric motor technology has driven this new interest in rimdrive propulsion. Pdf the shaftless rimdriven thruster rdt has become an attractive. Pdf performance analysis rim driven propeller as a.
Bow thrusters make docking easier, since they allow the captain to turn the vessel to port or starboard side, without using the main propulsion mechanism which requires some forward motion for turning. Due to the fact that the rim driven propeller has a low tip speed of the propeller blades the noise emission from the propeller is significant lower than a normal propeller. Computational fluid dynamics simulation of a rim driven thruster. The optimization was based on a surrogate model and performed for.
Rimdriven thruster is a novel type of propulsion unit which was presented at the shipbuilding. The rimdriven thruster is a marine propeller which does not need a hub for transmission of the driving torque. The electrical rim driven thruster consist of an electric torque motor, which drives an inside propeller. Numerical design of a rimdriven thruster using a rans. Rimdriven thruster is a relatively new thruster which integrates the propeller and the motor system together so that there is no need for the central shaft. Beside the propeller, the motor has no gears or other mechanical moving parts. Silentdynamics customized rim thruster based propulsion solutions applications include tunnel thrusters, and silentdynamics ert thrusters can be configured to be retractable andor azimuthing. Pdf numerical design of a rimdriven thruster using a. The more recent podded drives consist of a conventional propeller which is arranged together with a conventional electric motor into an azimuthable gondola under water. Primarily, this has to do with the modern electric motor. The optimization framework consists of a parametric description of the rim blade geometry and a multiobjective optimization algorithm which makes use of the results from highfidelity rans calculations to drive the choice towards optimal blade shapes. The performance of vertical tunnel thrusters on an. The voith inline system is the perfect drive for a bow or stern thruster arrangement. With the schottel rim thruster srt the german propulsion specialist extends his product range with four sizes 200 800 kw.
Design and performance of an electric tipdriven thruster s. Integratedthrusters originally researched at the university of southampton, england, have been developed into robust products ranging from 50mm propellers to 300mm 250kgf thrust workhorses. The stator is directly fixed to the ships tunnel structure and houses the windings of the electric motor. The impact from the spread of the virus and the general restrictions implemented by authorities all over the world are heavily affecting all of us, both in private and in our daily business. Starting from a baseline design an overall improvement of speed from 1. Numerical design and experimental verification of a rim driven thruster alexey yu. The propulsor assembly is supported within the housing and comprises propeller blades extending radially from the axis of the flow path. Simulationdriven design of a rim drive for an autonomous. Pdf performance analysis rim driven propeller as a propulsor. Building a rimdrive thruster system that offers the ultimate in comfort without compromise in performance is our driving motivation. Diskdrive thruster technology hydromea subsea propulsion. This level of benefit is also reflected in the information published by rollsroyce on its rimdriven thruster technology. The thruster will easily navigate through floating debris such as pieces of water plants or ropes.
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