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H
home.engineering.iastate.edu
research
https://home.engineering.iastate.edu/jdm/WESEP594/2012-EIF-Wind-turbine.pdf
The effects of the tip-speed-ratio of the wind tur-bine model on the dynamic wind loads and wake flow characteristics were quantified in the terms of the variations of the aerodynamic thrust and bending moment coefficients of the wind turbine model, the evolution of the helical tip vortices and the unsteady vortices shedding from the blade roots and turbine nacelle, the deceleration of the incoming airflows after passing the rotation disk of the turbine blades, the TKE and Reynolds stress distributions in the near wake of the wind turbine model. Fig. 12 Evolution of the tip vortex structures at the tip-speed-ratio of k = 3.0 θ θ θ θ θ θ θ θ Fig. 13 A 3-D view of the tip vortex structures in near wake of the wind turbine model 1290 Exp Fluids (2012) 52:1277–1294 123 The strength of the helical tip vortices, which can be determined quantitatively based on the ‘‘phase-locked’’ PIV measurements, was also found to change significantly as they moved downstream. The effects of the tip-speed-ratio of the wind turbine model on the evolution of the unsteady vortex flow structures in the wake of the wind turbine model were revealed clearly from the comparison of the PIV measurement results.
T
techscience.com
article
https://www.techscience.com/fdmp/v21n11/64676
1 School of Green Energy and Storage, Lanzhou University of Technology, Lanzhou, 730050, China. 3 School of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou, 730050, China. (This article belongs to the Special Issue: Fluid Mechanics & Thermodynamics in Renewable Energy and HVAC Systems). *Fluid Dynamics & Materials Processing* **2025**, *21*(11), 2651-2671. In this study, a reduced-scale parked wind turbine is exposed to downburst wind fields to investigate the resulting extreme wind loads. The analysis emphasizes both the flow structure of downbursts and the variations of surface wind pressure on turbine blades under different jet parameters. Results show that increasing jet velocity markedly enhances the maximum horizontal wind speed, while greater jet height reduces the horizontal wind speed and shifts the peak velocity closer to the jet center. Increasing jet diameter primarily affects the radial position of the maximum horizontal wind speed. Conversely, increasing jet height extends the dissipation path of the downdraft, thereby reducing the intensity of the airflow acting on the blades.
E
extrica.com
article
https://www.extrica.com/article/20595
# Dynamic performance analysis for wind turbine in complex conditions. This article presents a method to get dynamic responses of a wind turbine under different conditions. The time-varying load acting on the blade is calculated by using the blade element momentum theory, and the dynamic performance of the wind turbine are calculated by applying the modal superposition method with blade loads as excitations. The dynamic response process is adopted to carry out a dynamic analysis, and theoretical results are compared with experimental results, indicated that the analysis presented in this paper is correct. The results indicate that the wind turbine experiences a huge transverse vibration under turbulent wind, the hub vibration is intensified up to 179.52 %, and the vibration of the blade tip intensifies up to 190.41 % under the action of gusts in extreme conditions relative to the steady state, which shall be considered during design. * This article presents a computing method to get dynamic responses of a wind turbine under different conditions.
U
ui.adsabs.harvard.edu
research
https://ui.adsabs.harvard.edu/abs/2012ExFl...52.1277H/abstract
An experimental study was conducted to characterize the dynamic wind loads and evolution of the unsteady vortex and turbulent flow structures dynamic wind
E
eng-tips.com
article
https://www.eng-tips.com/threads/wind-loads-dynamic-or-static.499855
Wind loads are dynamic but can often be considered as static or rather static equivalent. It all depends on how the structure you are designing
A
asmedigitalcollection.asme.org
article
https://asmedigitalcollection.asme.org/computationalnonlinear/article/10/4/04…
The wind turbine is modeled in the Siemens in-house developed aero-elastic simulation tool BHawC. It is constructed from Timoshenko beam elements each placed in
S
sciencedirect.com
article
https://www.sciencedirect.com/science/article/abs/pii/S0960148120313719
Analysis of structural dynamic response of wind turbine is one of important issues to assess its structural integrity and safety during operation process.
D
docs.nlr.gov
official
https://docs.nlr.gov/docs/fy25osti/91458.pdf
List of Typical Components of a Design Load Basis Component Description Project description A succinct description of the goals of the project and specifications of the product and geographical/environmental settings as applicable Purpose of the document Scope of the design load basis, including parties involved and respective responsibilities (e.g., original equipment manufacturer responsibility, professional engineer responsibility, certification body responsibility) Standards of reference Design standards and all regulatory material that should be addressed and/or referenced in the design process and the final design report to be used for assessing the project, including certification and/or deployment and installation System of units • International System of Units (SI) • Imperial Coordinate systems and conventions • Global and component-local reference frame • Sign convention for rotations, actions, and reactions Design procedure • Design process and design control (Independent System Operator 2015) • Design iterations Numerical model description • Software • Discretization of the components • Soil/foundation • Damping • Aerodynamic assumptions • Controller specifics • Rotor-nacelle-assembly specifics Environmental conditions Wind distribution and key design parameters (e.g., as found in Annex A of International Electrotechnical Commission [IEC] 61400-1 or Annex B of IEC 61400-2) Load case table • Matrix of design load cases (DLCs) including key environmental conditions (e.g., mean wind speed, configuration parameters (e.g., yaw errors), number of seeds, duration of simulations, load partial safety factors (PSFs) 6 This report is available at no cost from the National Renewable Energy Laboratory at www.nrel.gov/publications.