Koen Boorsma
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View article: Field experiments of wind turbine vibrations in stand still conditions
Field experiments of wind turbine vibrations in stand still conditions Open
Modern wind turbines become increasingly flexible, and as a result more sensitive to vibrations. Currently, wind turbine vibrations at standstill are observed at high wind speeds. However, the exact conditions and sources of excitation cau…
View article: Blade Surface Pressure Measurements in the Field and Their Usage for Aerodynamic Model Validation
Blade Surface Pressure Measurements in the Field and Their Usage for Aerodynamic Model Validation Open
This study presents results from a long‐term measurement campaign on a research wind turbine in the field. Pressure measurements are conducted at 25% blade radius over several months. Together with inflow measurements provided by a LiDAR s…
View article: Blade surface pressure measurements in the field and their usage for aerodynamic model validation
Blade surface pressure measurements in the field and their usage for aerodynamic model validation Open
This study presents results from a long-term measurement campaign on a research wind turbine in the field. Pressure measurements are conducted at 25% blade radius over several months. Together with inflow measurements provided by a LiDAR s…
View article: Experimental analysis of a horizontal-axis wind turbine with swept blades using PIV data
Experimental analysis of a horizontal-axis wind turbine with swept blades using PIV data Open
This study presents findings from a wind tunnel experiment investigating a model wind turbine equipped with aft-swept blades. Utilising particle image velocimetry, velocity fields were measured at multiple radial stations. These allow the …
View article: Validation of a BEM correction model for swept blades using experimental data
Validation of a BEM correction model for swept blades using experimental data Open
This study validates a correction model, which extends standard blade element momentum theory to swept blades and, by doing so, enhances wind turbine simulation predictability for these advanced geometries. This correction model addresses …
View article: Challenges in Rotor Aerodynamic Modeling for Non-Uniform Inflow Conditions
Challenges in Rotor Aerodynamic Modeling for Non-Uniform Inflow Conditions Open
Within an international collaboration framework, the accuracy of rotor aerodynamic models used for design load calculations of wind turbines is being assessed. Where the use of high-fidelity computation fluid dynamics (CFD) and mid-fidelit…
View article: Aerodynamic characterisation of a thrust-scaled IEA 15 MW wind turbine model: experimental insights using PIV data
Aerodynamic characterisation of a thrust-scaled IEA 15 MW wind turbine model: experimental insights using PIV data Open
This study presents results from a wind tunnel experiment on a three-bladed horizontal axis wind turbine. The model turbine is a scaled-down version of the IEA 15 MW reference wind turbine, preserving the non-dimensional thrust distributio…
View article: Comment on wes-2024-11
Comment on wes-2024-11 Open
Abstract. This study presents findings from a wind tunnel experiment investigating a model wind turbine equipped with aft-swept blades. Utilising Particle Image Velocimetry, velocity fields were measured at multiple radial…
View article: Comment on wes-2024-3
Comment on wes-2024-3 Open
Abstract. This study presents results from a wind tunnel experiment on a three-bladed horizontal axis wind turbine. The model turbine is a scaled-down version of the IEA 15 MW reference wind turbine, preserving the non-dim…
View article: Aerodynamic characterisation of a thrust-scaled IEA 15 MW wind turbine model: Experimental insights using PIV data
Aerodynamic characterisation of a thrust-scaled IEA 15 MW wind turbine model: Experimental insights using PIV data Open
This study presents results from a wind tunnel experiment on a three-bladed horizontal axis wind turbine. The model turbine is a scaled-down version of the IEA 15 MW reference wind turbine, preserving the non-dimensional thrust distributio…
View article: Experimental analysis of a horizontal axis wind turbine with swept blades using PIV data
Experimental analysis of a horizontal axis wind turbine with swept blades using PIV data Open
This study presents findings from a wind tunnel experiment investigating a model wind turbine equipped with aft-swept blades. Utilising Particle Image Velocimetry, velocity fields were measured at multiple radial stations. These allow the …
View article: Design of an Aeroelastically Tailored Wind Turbine Blade Tip for Field Experiments
Design of an Aeroelastically Tailored Wind Turbine Blade Tip for Field Experiments Open
View article: Reply on RC2
Reply on RC2 Open
Abstract. The wind turbine wake is a downstream region of velocity deficit, featuring higher turbulence and a complex helical vortex structure. In low ambient turbulence and low tip speed ratio conditions, the wind turbine…
View article: On the characteristics of the wake of a wind turbine undergoing large motions caused by a floating structure: an insight based on experiments and multi-fidelity simulations from the OC6 project Phase III
On the characteristics of the wake of a wind turbine undergoing large motions caused by a floating structure: an insight based on experiments and multi-fidelity simulations from the OC6 project Phase III Open
This study reports the results of the second round of analyses of the Offshore Code Comparison, Collaboration, Continued, with Correlation and unCertainty (OC6) project Phase III. While the first round investigated rotor aerodynamic loadin…
View article: Reply on RC1
Reply on RC1 Open
Abstract. The wind turbine wake is a downstream region of velocity deficit, featuring higher turbulence and a complex helical vortex structure. In low ambient turbulence and low tip speed ratio conditions, the wind turbine…
View article: Comment on wes-2023-90
Comment on wes-2023-90 Open
Abstract. The wind turbine wake is a downstream region of velocity deficit, featuring higher turbulence and a complex helical vortex structure. In low ambient turbulence and low tip speed ratio conditions, the wind turbine…
View article: Wind Turbine Noise Code Benchmark: A Comparison and Verification Exercise: Preprint
Wind Turbine Noise Code Benchmark: A Comparison and Verification Exercise: Preprint Open
In a number of institutions and companies, researchers and engineers are developing modeling numerical frameworks that are used to predict the aerodynamic noise emission from a wind turbine rotor. The simulation codes vary from empirically…
View article: Segmented Gurney Flaps for Enhanced Wind Turbine Wake Recovery
Segmented Gurney Flaps for Enhanced Wind Turbine Wake Recovery Open
The wind turbine wake is a downstream region of velocity deficit, featuring higher turbulence and a complex helical vortex structure. In low ambient turbulence and low tip speed ratio conditions, the wind turbine wake is extremely stable. …
View article: Comment on wes-2023-21
Comment on wes-2023-21 Open
Abstract. This study reports the results of the second round of analyses of the OC6 project Phase III. While the first round investigated rotor aerodynamic loading, here focus is given to the wake behavior of a floating wi…
View article: Investigation of the dynamic inflow effects due to collective and individual pitch steps on a wind tunnel setup
Investigation of the dynamic inflow effects due to collective and individual pitch steps on a wind tunnel setup Open
Dynamic inflow effects occur due to the rapid change of the rotor loading under conditions such as fast pitch steps. The paper presents a setup suitable for the investigation of those effects for non-axisymmetric rotor conditions, namely i…
View article: OC6 project Phase III: validation of the aerodynamic loading on a wind turbine rotor undergoing large motion caused by a floating support structure
OC6 project Phase III: validation of the aerodynamic loading on a wind turbine rotor undergoing large motion caused by a floating support structure Open
This paper provides a summary of the work done within Phase III of the Offshore Code Comparison Collaboration, Continued, with Correlation and unCertainty (OC6) project, under the International Energy Agency Wind Technology Collaboration P…
View article: On the characteristics of the wake of a wind turbine undergoing large motions caused by a floating structure: an insight based on experiments and multi-fidelity simulations from the OC6 Phase III Project
On the characteristics of the wake of a wind turbine undergoing large motions caused by a floating structure: an insight based on experiments and multi-fidelity simulations from the OC6 Phase III Project Open
This study reports the results of the second round of analyses of the OC6 project Phase III. While the first round investigated rotor aerodynamic loading, here focus is given to the wake behavior of a floating wind turbine under large moti…
View article: Progress in the validation of rotor aerodynamic codes using field data
Progress in the validation of rotor aerodynamic codes using field data Open
Within the framework of the fourth phase of the International Energy Agency (IEA) Wind Task 29, a large comparison exercise between measurements and aeroelastic simulations has been carried out featuring three simulation cases in axial, sh…
View article: A comparison of dynamic inflow models for the blade element momentum method
A comparison of dynamic inflow models for the blade element momentum method Open
With the increase in rotor sizes, the implementation of innovative pitch control strategies, and the first floating solutions entering the market, the importance of unsteady aerodynamic phenomena in the operation of modern offshore wind tu…
View article: Comment on wes-2022-92
Comment on wes-2022-92 Open
Abstract. With the increase in rotor sizes, the implementation of innovative pitch control strategies, and the first floating solutions entering the market, the importance of unsteady aerodynamic phenomena in the operation…
View article: Comment on wes-2022-92
Comment on wes-2022-92 Open
Abstract. With the increase in rotor sizes, the implementation of innovative pitch control strategies, and the first floating solutions entering the market, the importance of unsteady aerodynamic phenomena in the operation…
View article: A comparison of dynamic inflow models for the Blade Element Momentum method
A comparison of dynamic inflow models for the Blade Element Momentum method Open
With the increase in rotor sizes, the implementation of innovative pitch control strategies, and the first floating solutions entering the market, the importance of unsteady aerodynamic phenomena in the operation of modern offshore wind tu…
View article: Comment on wes-2022-74
Comment on wes-2022-74 Open
Abstract. This paper provides a summary of the work done within Phase III of the Offshore Code Comparison, Collaboration, Continued, with Correlation and unCertainty project (OC6), under International Energy Agency Wind Ta…
View article: Comment on wes-2022-51
Comment on wes-2022-51 Open
Abstract. Within the framework of the fourth phase of the International Energy Agency (IEA) Wind Task 29, a large comparison exercise between measurements and aeroelastic simulations has been carried out featuring three …
View article: An efficient blade sweep correction model for blade element momentum theory
An efficient blade sweep correction model for blade element momentum theory Open
This article proposes an efficient correction model that enables the extension of the blade element momentum method (BEM) for swept blades. Standard BEM algorithms, assuming a straight blade in the rotor plane, cannot account for the chang…