The Experts below are selected from a list of 183 Experts worldwide ranked by ideXlab platform
A. G. Molland - One of the best experts on this subject based on the ideXlab platform.
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experimentally validated numerical method for the hydrodynamic design of horizontal axis tidal turbines
Ocean Engineering, 2007Co-Authors: W. M J Batten, A. G. Molland, Abubakr S. Bahaj, J R ChaplinAbstract:Although a lot can be learnt from technology transfer from wind turbines and Ship Propellers, there have been a few experiments investigating marine current turbines. As a result, a study has been carried out on the power, thrust and cavitation characteristics of 1/20th scale model of a possible 16 m diameter horizontal axis tidal turbine. Cavitation tunnel experiments for different blade pitch settings have been compared with simulations based on a developed blade element-momentum theory. This theory has been shown to provide a satisfactory representation of the experimental turbine performance characteristics. As an example application, the developed theory has been used to design possible horizontal axis tidal turbines for the tidal flows around Portland Bill. The results show that there is a clear balance between design loads and optimisation of energy yields.
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Hydrodynamics of marine current turbines
Renewable Energy, 2006Co-Authors: W. M J Batten, A. G. Molland, Abubakr S. Bahaj, J R ChaplinAbstract:Various global studies have shown that marine currents have large potential as a predictable sustainable resource for commercial scale generation of electrical power. For successful exploitation of this resource, an understanding of the hydrodynamics of the marine current turbine is of primary importance. Although a lot can be learned from the technology transfer from wind turbines and Ship Propellers, there has been limited hydrodynamics research for this particular application. A methodology is presented for the hydrodynamic design of horizontal axis marine current turbines. Recent research has investigated the performance of suitable 2D section shapes both experimentally in a cavitation tunnel and with numerical simulations. A numerical model of a typical 3D rotor is used to demonstrate parametric variations of the design parameters and the use of alternative blade sections. ?? 2005 Elsevier Ltd. All rights reserved.
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Eexperimentally vailidated numerical method for the hydrodynamic design of horizonatl axis tidal turbines
6th European Wave and Tidal Energy Conference, 2005Co-Authors: W. M J Batten, A. G. Molland, Abubakr S. Bahaj, J R ChaplinAbstract:Although a lot can be learned from technology transfer from wind turbines and Ship Propellers, there has been few experiments investigating marine current turbines. As a result, a study has been carried out into the power, thrust and cavitation characteristics of 1/15th scale model of a possible 12 meter diameter horizontal axis tidal turbine. Cavitation tunnel experiments for different blade pitch settings have been compared with simulations based on a developed Blade Element Momentum theory. This theory has been shown to provide a satisfactory representation of the experimental turbine performance characteristics. As an example application, the developed theory has been used to design possible horizontal axis tidal turbines for the tidal flows around Portland Bill.
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A propeller thrust and torque dynamometer for wind tunnel models
Strain, 2002Co-Authors: A. G. Molland, Stephen R. TurnockAbstract:The design, construction and calibration of a propeller thrust and torque dynamometer is described. The dynamometer was constructed primarily for the testing of model Ship Propellers when working upstream of a rudder. An outline of the specialised design requirements is given. The basic design concepts are described together with the reasons for the choice of flexures and their dimensions, strain gauges, circuits, bridge voltages and instrumentation. A brief description of the calibration process is given and the calibration results are described and discussed. It was found that there were no interactions between the components, a satisfactory overall measuring accuracy was achieved and the dynamometer had performed well in service. It is concluded that the overall design approach, concept and design details were satisfactory and suitable for this particular application.
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The design, construction and calibration of a thrust and torque dynamometer for a wind tunnel propeller model
Ship Science Report No 44, 1990Co-Authors: A. G. Molland, Stephen R. TurnockAbstract:A description is given of the background design, choice of composite materials and construction of a model of a Ship propeller. The propeller was to form part of a propeller/rudder experimental rig which would be used in a wind tunnel to investigate interactions between Ship Propellers and rudders.
J R Chaplin - One of the best experts on this subject based on the ideXlab platform.
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experimentally validated numerical method for the hydrodynamic design of horizontal axis tidal turbines
Ocean Engineering, 2007Co-Authors: W. M J Batten, A. G. Molland, Abubakr S. Bahaj, J R ChaplinAbstract:Although a lot can be learnt from technology transfer from wind turbines and Ship Propellers, there have been a few experiments investigating marine current turbines. As a result, a study has been carried out on the power, thrust and cavitation characteristics of 1/20th scale model of a possible 16 m diameter horizontal axis tidal turbine. Cavitation tunnel experiments for different blade pitch settings have been compared with simulations based on a developed blade element-momentum theory. This theory has been shown to provide a satisfactory representation of the experimental turbine performance characteristics. As an example application, the developed theory has been used to design possible horizontal axis tidal turbines for the tidal flows around Portland Bill. The results show that there is a clear balance between design loads and optimisation of energy yields.
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Hydrodynamics of marine current turbines
Renewable Energy, 2006Co-Authors: W. M J Batten, A. G. Molland, Abubakr S. Bahaj, J R ChaplinAbstract:Various global studies have shown that marine currents have large potential as a predictable sustainable resource for commercial scale generation of electrical power. For successful exploitation of this resource, an understanding of the hydrodynamics of the marine current turbine is of primary importance. Although a lot can be learned from the technology transfer from wind turbines and Ship Propellers, there has been limited hydrodynamics research for this particular application. A methodology is presented for the hydrodynamic design of horizontal axis marine current turbines. Recent research has investigated the performance of suitable 2D section shapes both experimentally in a cavitation tunnel and with numerical simulations. A numerical model of a typical 3D rotor is used to demonstrate parametric variations of the design parameters and the use of alternative blade sections. ?? 2005 Elsevier Ltd. All rights reserved.
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Eexperimentally vailidated numerical method for the hydrodynamic design of horizonatl axis tidal turbines
6th European Wave and Tidal Energy Conference, 2005Co-Authors: W. M J Batten, A. G. Molland, Abubakr S. Bahaj, J R ChaplinAbstract:Although a lot can be learned from technology transfer from wind turbines and Ship Propellers, there has been few experiments investigating marine current turbines. As a result, a study has been carried out into the power, thrust and cavitation characteristics of 1/15th scale model of a possible 12 meter diameter horizontal axis tidal turbine. Cavitation tunnel experiments for different blade pitch settings have been compared with simulations based on a developed Blade Element Momentum theory. This theory has been shown to provide a satisfactory representation of the experimental turbine performance characteristics. As an example application, the developed theory has been used to design possible horizontal axis tidal turbines for the tidal flows around Portland Bill.
David Bellevre - One of the best experts on this subject based on the ideXlab platform.
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validation of a high cycle fatigue model via calculation test comparisons at structural scale application to copper alloy sand cast Ship Propellers
International Journal of Fatigue, 2015Co-Authors: Anthony Ezanno, Cedric Doudard, Sylvain Moyne, Sylvain Calloch, Thierry Millot, David BellevreAbstract:Abstract An in-house developed software is proposed to study structures made of cast alloy and subjected to high-cycle fatigue. This in-house developed software is based on the implementation of a probabilistic two-scale model for high cycle fatigue life prediction. To validate the proposed approach, calculation/test comparisons at the scale of an engineering component (i.e., copper alloy sand cast Ship Propellers) have been performed. So, the first part of the present paper concerns the description of the model for fatigue life prediction and of the fatigue tests performed on two marine Propellers. In a second part, the performance of the proposed model is estimated by comparing experimental and theoretical results in the case of full-scale fatigue tests. The results are then discussed and analyzed.
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Validation of a high-cycle fatigue model via calculation/test comparisons at structural scale: Application to copper alloy sand-cast Ship Propellers
International Journal of Fatigue, 2015Co-Authors: Anthony Ezanno, Cedric Doudard, Sylvain Moyne, Sylvain Calloch, Thierry Millot, David BellevreAbstract:Abstract An in-house developed software is proposed to study structures made of cast alloy and subjected to high-cycle fatigue. This in-house developed software is based on the implementation of a probabilistic two-scale model for high cycle fatigue life prediction. To validate the proposed approach, calculation/test comparisons at the scale of an engineering component (i.e., copper alloy sand cast Ship Propellers) have been performed. So, the first part of the present paper concerns the description of the model for fatigue life prediction and of the fatigue tests performed on two marine Propellers. In a second part, the performance of the proposed model is estimated by comparing experimental and theoretical results in the case of full-scale fatigue tests. The results are then discussed and analyzed.
W. M J Batten - One of the best experts on this subject based on the ideXlab platform.
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experimentally validated numerical method for the hydrodynamic design of horizontal axis tidal turbines
Ocean Engineering, 2007Co-Authors: W. M J Batten, A. G. Molland, Abubakr S. Bahaj, J R ChaplinAbstract:Although a lot can be learnt from technology transfer from wind turbines and Ship Propellers, there have been a few experiments investigating marine current turbines. As a result, a study has been carried out on the power, thrust and cavitation characteristics of 1/20th scale model of a possible 16 m diameter horizontal axis tidal turbine. Cavitation tunnel experiments for different blade pitch settings have been compared with simulations based on a developed blade element-momentum theory. This theory has been shown to provide a satisfactory representation of the experimental turbine performance characteristics. As an example application, the developed theory has been used to design possible horizontal axis tidal turbines for the tidal flows around Portland Bill. The results show that there is a clear balance between design loads and optimisation of energy yields.
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Hydrodynamics of marine current turbines
Renewable Energy, 2006Co-Authors: W. M J Batten, A. G. Molland, Abubakr S. Bahaj, J R ChaplinAbstract:Various global studies have shown that marine currents have large potential as a predictable sustainable resource for commercial scale generation of electrical power. For successful exploitation of this resource, an understanding of the hydrodynamics of the marine current turbine is of primary importance. Although a lot can be learned from the technology transfer from wind turbines and Ship Propellers, there has been limited hydrodynamics research for this particular application. A methodology is presented for the hydrodynamic design of horizontal axis marine current turbines. Recent research has investigated the performance of suitable 2D section shapes both experimentally in a cavitation tunnel and with numerical simulations. A numerical model of a typical 3D rotor is used to demonstrate parametric variations of the design parameters and the use of alternative blade sections. ?? 2005 Elsevier Ltd. All rights reserved.
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Eexperimentally vailidated numerical method for the hydrodynamic design of horizonatl axis tidal turbines
6th European Wave and Tidal Energy Conference, 2005Co-Authors: W. M J Batten, A. G. Molland, Abubakr S. Bahaj, J R ChaplinAbstract:Although a lot can be learned from technology transfer from wind turbines and Ship Propellers, there has been few experiments investigating marine current turbines. As a result, a study has been carried out into the power, thrust and cavitation characteristics of 1/15th scale model of a possible 12 meter diameter horizontal axis tidal turbine. Cavitation tunnel experiments for different blade pitch settings have been compared with simulations based on a developed Blade Element Momentum theory. This theory has been shown to provide a satisfactory representation of the experimental turbine performance characteristics. As an example application, the developed theory has been used to design possible horizontal axis tidal turbines for the tidal flows around Portland Bill.
Abubakr S. Bahaj - One of the best experts on this subject based on the ideXlab platform.
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experimentally validated numerical method for the hydrodynamic design of horizontal axis tidal turbines
Ocean Engineering, 2007Co-Authors: W. M J Batten, A. G. Molland, Abubakr S. Bahaj, J R ChaplinAbstract:Although a lot can be learnt from technology transfer from wind turbines and Ship Propellers, there have been a few experiments investigating marine current turbines. As a result, a study has been carried out on the power, thrust and cavitation characteristics of 1/20th scale model of a possible 16 m diameter horizontal axis tidal turbine. Cavitation tunnel experiments for different blade pitch settings have been compared with simulations based on a developed blade element-momentum theory. This theory has been shown to provide a satisfactory representation of the experimental turbine performance characteristics. As an example application, the developed theory has been used to design possible horizontal axis tidal turbines for the tidal flows around Portland Bill. The results show that there is a clear balance between design loads and optimisation of energy yields.
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Hydrodynamics of marine current turbines
Renewable Energy, 2006Co-Authors: W. M J Batten, A. G. Molland, Abubakr S. Bahaj, J R ChaplinAbstract:Various global studies have shown that marine currents have large potential as a predictable sustainable resource for commercial scale generation of electrical power. For successful exploitation of this resource, an understanding of the hydrodynamics of the marine current turbine is of primary importance. Although a lot can be learned from the technology transfer from wind turbines and Ship Propellers, there has been limited hydrodynamics research for this particular application. A methodology is presented for the hydrodynamic design of horizontal axis marine current turbines. Recent research has investigated the performance of suitable 2D section shapes both experimentally in a cavitation tunnel and with numerical simulations. A numerical model of a typical 3D rotor is used to demonstrate parametric variations of the design parameters and the use of alternative blade sections. ?? 2005 Elsevier Ltd. All rights reserved.
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Eexperimentally vailidated numerical method for the hydrodynamic design of horizonatl axis tidal turbines
6th European Wave and Tidal Energy Conference, 2005Co-Authors: W. M J Batten, A. G. Molland, Abubakr S. Bahaj, J R ChaplinAbstract:Although a lot can be learned from technology transfer from wind turbines and Ship Propellers, there has been few experiments investigating marine current turbines. As a result, a study has been carried out into the power, thrust and cavitation characteristics of 1/15th scale model of a possible 12 meter diameter horizontal axis tidal turbine. Cavitation tunnel experiments for different blade pitch settings have been compared with simulations based on a developed Blade Element Momentum theory. This theory has been shown to provide a satisfactory representation of the experimental turbine performance characteristics. As an example application, the developed theory has been used to design possible horizontal axis tidal turbines for the tidal flows around Portland Bill.