Investigating wind turbine dynamic transient loads using contactless shaft torque measurements

Zappalá, Donatella; Crabtree, Christopher J.; Hogg, Simon

doi:10.1049/joe.2018.9361

Cited by 5 publications

(2 citation statements)

References 13 publications

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“…The torque sensor, depicted in Figure 13-15, was utilized to determine the mechanical torque installed on the main shaft between the rotor blade and the brake system. This instrument, commonly found in HAWT blade systems, has been proven to accurately measure the power coefficient in various studies [26,47,49,50]. To attain the most precise results, it's crucial to position the torque sensor adjacent to the rotor blade to minimize any disruption caused by shaft friction during measurement.…”

Section: Experimental Testing In a Wind Tunnelmentioning

confidence: 99%

Aerodynamic Performance Investigation of a Small Horizontal Axis Wind Turbine with Multi-Airfoil Blade Profiles of SD2030 and E231 Using Wind Tunnel Experiments and BEM Theory Method

Baker

Ishak²,

Lazim³

et al. 2023

ARFMTS

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The goal of this study is to investigate the performance of a small horizontal axis wind turbine blade at wind speeds of lower than 5 m/sec numerically and experimentally. The rotor blade has a diameter of 0.7m and consists of two airfoils profile: the thin airfoil SD2030 selected at the outboard region, and the thick airfoil E231 at the inboard region. The former airfoil, SD2030, is highly recognized for aerodynamic performance as it is suitable for low Reynolds number (Re), while the latter airfoil E231 is likewise appropriate for low Re flow but has a higher thickness-to-chord ratio which acts as structural support and good strength at the hub. The selected airfoils were analyzed using QBlade software based on XFOIL and Blade Element Theory (BEM) for different Reynolds number. Using a low-speed wind tunnel and Reynolds number ranging from 1x105 to 5x105, experiments at pitch angles of 5ο were conducted to determine the variation in torque and predict blade performance. The results reveal that the turbine with two hybrid different airfoil profiles have achieved a better start-up response at low wind speed of 1.5 m/s and a high-power coefficient of 0.34 with 3.7 tip speed ratio. The turbine can be used to generate a power of 0.5W at 1.5 m/s and a maximum power harvest of up to 20W at a wind speed of 7m/sec. The turbine's performance compared to other small wind turbines from the literatures demonstrate good performance and the results obtained from wind tunnel data were found in satisfactory agreement with the results provided by the BEM code.

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Section: Experimental Testing In a Wind Tunnelmentioning

confidence: 99%

Aerodynamic Performance Investigation of a Small Horizontal Axis Wind Turbine with Multi-Airfoil Blade Profiles of SD2030 and E231 Using Wind Tunnel Experiments and BEM Theory Method

Baker

Ishak²,

Lazim³

et al. 2023

ARFMTS

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“…Though today’s CMSs can be used to gain insight into the drivetrain’s condition, they cannot measure GB input loads. According to [ 11 ], several studies have been conducted to measure the torque on the LSS [ 12 , 13 , 14 , 15 , 16 , 17 ]. In [ 18 ], torque measurements were categorized into strain gauges, magnetostrictive, surface acoustic wave, piezoelectric, and optical and inductive twist measurements.…”

Section: Introductionmentioning

confidence: 99%

From Strain to Loads: Development of a Measurement Solution for Wind Turbine Transmission Input Loads during Drivetrain Testing

Bilen

Azzam

Schelenz

et al. 2023

Sensors

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As wind energy is paving the way for the energy transition from fossil to renewable energy sources, the ongoing trend of increasing the rated power of wind turbines aims to reduce the overall cost of wind energy. The resulting increase in drivetrain loads motivates the need for wind turbine (WT) drivetrain testing in the development phase of critical components such as the WT main gearbox (GB). While several WT system test benches allow for the application of emulated rotor loads in six degrees of freedom (6-DOF), the drivetrain input loads can significantly differ from the GB 6-DOF input loads due to the design of the drivetrain under test. However, currently available load measurement solutions are not capable of sensing GB input loads in 6-DOF. Thus, this work aims to develop a methodology for converging signals from a purposely designed sensor setup and turbine specific design parameters to compute the GB 6-DOF input loads during WT testing. Strain gauges (SG) and accelerometers have been installed on the low-speed shaft (LSS) of a WT drivetrain under test at the 4MW WT system test bench at the Center for Wind Power Drives. Using the data of the aforementioned sensors, a methodology for computing the GB input loads is developed. The methodology is validated through comparison to the applied loads data provided by the aforementioned test bench. The results demonstrate the high promise of the proposed method for estimating the GB input loads during WT drivetrain testing.

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Validation of a non-contact technique for torque measurements in wind turbines using an enhanced transient FSV approach

et al. 2020

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Investigating wind turbine dynamic transient loads using contactless shaft torque measurements

Cited by 5 publications

References 13 publications

Aerodynamic Performance Investigation of a Small Horizontal Axis Wind Turbine with Multi-Airfoil Blade Profiles of SD2030 and E231 Using Wind Tunnel Experiments and BEM Theory Method

Aerodynamic Performance Investigation of a Small Horizontal Axis Wind Turbine with Multi-Airfoil Blade Profiles of SD2030 and E231 Using Wind Tunnel Experiments and BEM Theory Method

From Strain to Loads: Development of a Measurement Solution for Wind Turbine Transmission Input Loads during Drivetrain Testing

Validation of a non-contact technique for torque measurements in wind turbines using an enhanced transient FSV approach

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