The Experts below are selected from a list of 4347 Experts worldwide ranked by ideXlab platform
Kenji Kubomura - One of the best experts on this subject based on the ideXlab platform.
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IECON - Development of Hybrid Blade Angle Control System for Traversing Wind Turbines
IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society, 2018Co-Authors: Tomonobu Furuta, Hiroyuki Kawai, Masato Okamoto, Kenji KubomuraAbstract:In this paper, we consider a Passive-type Traversing Wind Turbine (PTWT) and propose a control system to improve power generation and windbreaker effect of the wind turbine. Wind power has been becoming more popular worldwide and several types of wind turbines to match different operating environments and objectives have been researched. As one of them, we have started to study a special type of Vertical-Axis Wind Turbine (VAWT) which may also solve wind disaster problems in agricultural areas. The parallel mechanism in this type of wind turbine makes it difficult to adjust Blades Angle, therefore the mechanism has trouble changing Blade Angle during sudden inversions in wind direction. However, by using a passive mechanism that only uses the power of the wind, the wind turbine can keep up with sudden inversions in wind direction. In addition, active control is possible by attaching actuators, and hybrid control (passive and active) may increase the efficiency of power generation and windbreaker effect. We conduct wind-tunnel tests to evaluate the incleased effectiveness of power generation using the hybrid control system. Additionally, we investigate drag of the wind turbine to clarify the windbreaker effect using the developed system.
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Development of Hybrid Blade Angle Control System for Traversing Wind Turbines
IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society, 2018Co-Authors: Tomonobu Furuta, Hiroyuki Kawai, Masato Okamoto, Kenji KubomuraAbstract:In this paper, we consider a Passive-type Traversing Wind Turbine (PTWT) and propose a control system to improve power generation and windbreaker effect of the wind turbine. Wind power has been becoming more popular worldwide and several types of wind turbines to match different operating environments and objectives have been researched. As one of them, we have started to study a special type of Vertical-Axis Wind Turbine (VAWT) which may also solve wind disaster problems in agricultural areas. The parallel mechanism in this type of wind turbine makes it difficult to adjust Blades Angle, therefore the mechanism has trouble changing Blade Angle during sudden inversions in wind direction. However, by using a passive mechanism that only uses the power of the wind, the wind turbine can keep up with sudden inversions in wind direction. In addition, active control is possible by attaching actuators, and hybrid control (passive and active) may increase the efficiency of power generation and windbreaker effect. We conduct wind-tunnel tests to evaluate the incleased effectiveness of power generation using the hybrid control system. Additionally, we investigate drag of the wind turbine to clarify the windbreaker effect using the developed system.
Anoop Verma - One of the best experts on this subject based on the ideXlab platform.
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A Data-Driven Approach for Monitoring Blade Pitch Faults in Wind Turbines
IEEE Transactions on Sustainable Energy, 2011Co-Authors: Andrew Kusiak, Anoop VermaAbstract:A data-mining-based prediction model is built to monitor the performance of a Blade pitch. Two Blade pitch faults, Blade Angle asymmetry, and Blade Angle implausibility were analyzed to determine the associations between them and the components/subassemblies of the wind turbine. Five data-mining algorithms have been studied to evaluate the quality of the models for prediction of Blade faults. The prediction model derived by the genetic programming algorithm resulted in the best accuracy and was selected to perform prediction at different time stamps.
Tomonobu Furuta - One of the best experts on this subject based on the ideXlab platform.
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IECON - Development of Hybrid Blade Angle Control System for Traversing Wind Turbines
IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society, 2018Co-Authors: Tomonobu Furuta, Hiroyuki Kawai, Masato Okamoto, Kenji KubomuraAbstract:In this paper, we consider a Passive-type Traversing Wind Turbine (PTWT) and propose a control system to improve power generation and windbreaker effect of the wind turbine. Wind power has been becoming more popular worldwide and several types of wind turbines to match different operating environments and objectives have been researched. As one of them, we have started to study a special type of Vertical-Axis Wind Turbine (VAWT) which may also solve wind disaster problems in agricultural areas. The parallel mechanism in this type of wind turbine makes it difficult to adjust Blades Angle, therefore the mechanism has trouble changing Blade Angle during sudden inversions in wind direction. However, by using a passive mechanism that only uses the power of the wind, the wind turbine can keep up with sudden inversions in wind direction. In addition, active control is possible by attaching actuators, and hybrid control (passive and active) may increase the efficiency of power generation and windbreaker effect. We conduct wind-tunnel tests to evaluate the incleased effectiveness of power generation using the hybrid control system. Additionally, we investigate drag of the wind turbine to clarify the windbreaker effect using the developed system.
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Development of Hybrid Blade Angle Control System for Traversing Wind Turbines
IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society, 2018Co-Authors: Tomonobu Furuta, Hiroyuki Kawai, Masato Okamoto, Kenji KubomuraAbstract:In this paper, we consider a Passive-type Traversing Wind Turbine (PTWT) and propose a control system to improve power generation and windbreaker effect of the wind turbine. Wind power has been becoming more popular worldwide and several types of wind turbines to match different operating environments and objectives have been researched. As one of them, we have started to study a special type of Vertical-Axis Wind Turbine (VAWT) which may also solve wind disaster problems in agricultural areas. The parallel mechanism in this type of wind turbine makes it difficult to adjust Blades Angle, therefore the mechanism has trouble changing Blade Angle during sudden inversions in wind direction. However, by using a passive mechanism that only uses the power of the wind, the wind turbine can keep up with sudden inversions in wind direction. In addition, active control is possible by attaching actuators, and hybrid control (passive and active) may increase the efficiency of power generation and windbreaker effect. We conduct wind-tunnel tests to evaluate the incleased effectiveness of power generation using the hybrid control system. Additionally, we investigate drag of the wind turbine to clarify the windbreaker effect using the developed system.
Andre Starke - One of the best experts on this subject based on the ideXlab platform.
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Numerical and Experimental Investigation of the Impact of Mixed Flow Turbine Inlet Cone Angle and Inlet Blade Angle
Journal of Turbomachinery-transactions of The Asme, 2019Co-Authors: Thomas Leonard, Stephen Spence, Andre Starke, Dietmar FilsingerAbstract:Mixed flow turbines (MFTs) offer potential benefits for turbocharged engines when considering off-design performance and engine transient behavior. Although the performance and use of MFTs are described in the literature, little is published on the combined impact of the cone Angle and the inlet Blade Angle, which are the defining features of such turbines. Numerical simulations were completed using a computational fluid dynamics (CFD) model that was validated against experimental measurements for a baseline geometry. The mechanical impact of the design changes was also analyzed. Based on the results of the numerical study, two rotors of different Blade Angle and cone Angle were selected and manufactured. These rotors were tested using the Queen's University Belfast (QUB) low-temperature turbine test rig, which allowed for accurate and wide-range mapping of the turbine performance to low values of the velocity ratio. The performance results from these additional rotors were used to further validate the numerical findings. The numerical model was used to understand the underlying physical reasons for the measured performance differences through detailed consideration of the flow field at the rotor inlet and to document how the loss mechanisms and secondary flow structures developed with varying rotor inlet geometry. It was observed that large inlet Blade cone Angles resulted in strong separation and flow blockage near the hub at off-design conditions, which greatly reduced efficiency. However, the significant rotor inertia benefits achieved with the large Blade cone Angles were shown to compensate for the efficiency penalties and could be expected to deliver improved transient performance in downsized automotive engine applications.
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A Numerical and Experimental Investigation of the Impact of Mixed Flow Turbine Inlet Cone Angle and Inlet Blade Angle
Volume 2B: Turbomachinery, 2018Co-Authors: Thomas Leonard, Stephen Spence, Dietmar Filsinger, Andre StarkeAbstract:Mixed flow turbines offer potential benefits for turbocharged engines when considering off-design performance and engine transient behaviour. Although the performance and use of mixed flow turbines is described in the literature, little is published on the combined impact of the cone Angle and the inlet Blade Angle, which are the defining features of such turbines. Numerical simulations were completed using a CFD model that was validated against experimental measurements for a baseline geometry. The mechanical impact of the design changes was also analysed. Based on the results of the numerical study, two rotors of different Blade Angle and cone Angle were selected and manufactured. These rotors were tested using the QUB low temperature turbine test rig, which allowed for accurate and wide range mapping of the turbine performance to low values of velocity ratio. The performance results from these additional rotors were used to further validate the numerical findings. The numerical model was used to understand the underlying physical reasons for the measured performance differences through detailed consideration of the flow field at rotor inlet, and to document how the loss mechanisms and secondary flow structures developed with varying rotor inlet geometry. It was observed that large inlet Blade cone Angles resulted in strong separation and flow blockage near the hub at off-design conditions, which greatly reduced efficiency. However, the significant rotor inertia benefits achieved with the large Blade cone Angles were shown to compensate for the efficiency penalties and could be expected to deliver improved transient performance in downsized automotive engine applications.
Dietmar Filsinger - One of the best experts on this subject based on the ideXlab platform.
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Numerical and Experimental Investigation of the Impact of Mixed Flow Turbine Inlet Cone Angle and Inlet Blade Angle
Journal of Turbomachinery-transactions of The Asme, 2019Co-Authors: Thomas Leonard, Stephen Spence, Andre Starke, Dietmar FilsingerAbstract:Mixed flow turbines (MFTs) offer potential benefits for turbocharged engines when considering off-design performance and engine transient behavior. Although the performance and use of MFTs are described in the literature, little is published on the combined impact of the cone Angle and the inlet Blade Angle, which are the defining features of such turbines. Numerical simulations were completed using a computational fluid dynamics (CFD) model that was validated against experimental measurements for a baseline geometry. The mechanical impact of the design changes was also analyzed. Based on the results of the numerical study, two rotors of different Blade Angle and cone Angle were selected and manufactured. These rotors were tested using the Queen's University Belfast (QUB) low-temperature turbine test rig, which allowed for accurate and wide-range mapping of the turbine performance to low values of the velocity ratio. The performance results from these additional rotors were used to further validate the numerical findings. The numerical model was used to understand the underlying physical reasons for the measured performance differences through detailed consideration of the flow field at the rotor inlet and to document how the loss mechanisms and secondary flow structures developed with varying rotor inlet geometry. It was observed that large inlet Blade cone Angles resulted in strong separation and flow blockage near the hub at off-design conditions, which greatly reduced efficiency. However, the significant rotor inertia benefits achieved with the large Blade cone Angles were shown to compensate for the efficiency penalties and could be expected to deliver improved transient performance in downsized automotive engine applications.
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A Numerical and Experimental Investigation of the Impact of Mixed Flow Turbine Inlet Cone Angle and Inlet Blade Angle
Volume 2B: Turbomachinery, 2018Co-Authors: Thomas Leonard, Stephen Spence, Dietmar Filsinger, Andre StarkeAbstract:Mixed flow turbines offer potential benefits for turbocharged engines when considering off-design performance and engine transient behaviour. Although the performance and use of mixed flow turbines is described in the literature, little is published on the combined impact of the cone Angle and the inlet Blade Angle, which are the defining features of such turbines. Numerical simulations were completed using a CFD model that was validated against experimental measurements for a baseline geometry. The mechanical impact of the design changes was also analysed. Based on the results of the numerical study, two rotors of different Blade Angle and cone Angle were selected and manufactured. These rotors were tested using the QUB low temperature turbine test rig, which allowed for accurate and wide range mapping of the turbine performance to low values of velocity ratio. The performance results from these additional rotors were used to further validate the numerical findings. The numerical model was used to understand the underlying physical reasons for the measured performance differences through detailed consideration of the flow field at rotor inlet, and to document how the loss mechanisms and secondary flow structures developed with varying rotor inlet geometry. It was observed that large inlet Blade cone Angles resulted in strong separation and flow blockage near the hub at off-design conditions, which greatly reduced efficiency. However, the significant rotor inertia benefits achieved with the large Blade cone Angles were shown to compensate for the efficiency penalties and could be expected to deliver improved transient performance in downsized automotive engine applications.
