Determination of significant sources generating low-frequency noise in horizontal axis wind turbines
Authors
Abstract:
Several studies show that the Low-Frequency Noise (LFN) of wind turbines could have harmful effects on human health even when it is infrasound. In traditional classifications, the LFN of upwind turbines is referred only to steady thickness and steady loading sources, and the effect of vortices is considered negligible. In this study, the LFN of a horizontal axis wind turbine is simulated in wind speeds of 5-25 m/s by using a hybrid approach. The results show that vortices being far from blades have a significant effect on the LFN. It is also observed that the position received maximum LFN is far from the point introduced by the IEC 61400-11 standard for measuring the noise of horizontal axis wind turbines.
similar resources
Low-frequency noise from large wind turbines.
As wind turbines get larger, worries have emerged that the turbine noise would move down in frequency and that the low-frequency noise would cause annoyance for the neighbors. The noise emission from 48 wind turbines with nominal electric power up to 3.6 MW is analyzed and discussed. The relative amount of low-frequency noise is higher for large turbines (2.3-3.6 MW) than for small turbines (≤ ...
full textWind turbines — low level noise sources interfering with restoration ?
Wind turbines generate a low level noise and would thus not be expected to cause annoyance and disturb rest. In a society where people are being exposed to an increasing noise load, moderate and low level noise sources may also be perceived as annoying and hence inhibit restoration. This article presents an analysis of two socio-acoustic studies of wind turbine noise with the emphasis on percep...
full textDiscrete-time Control Stategies for Horizontal Axis Wind Turbines
This paper introduces two discrete-time controllers for horizontal axis wind turbines (HAWTs): a Linear Quadratic Gaussian (LQG) one and a model predictive (MPC) one. The LQG controller aims to strongly attenuate the disturbances influence on the system output. The control objective consists of keeping the output power constant, despite the wind variation, and thus reducing the fatigue that inv...
full textNew Airfoils for Small Horizontal Axis Wind Turbines
Department of Aeronautical and Astronautical Engineering. University of Illinois at Urbana-Champaign. 306 Talbot Laboratory. 104 S. Wright Street. Urbana. IL 61801-2935 In a continuing effort to enhance the performance of small wind energy systems, one root airfoil and three primary airfoils were specifically designed for small horizontal axis wind turbines. These airfoils are intended primaril...
full textHealth-Based Audible Noise Guidelines Account for Infrasound and Low-Frequency Noise Produced by Wind Turbines
Setbacks for wind turbines have been established in many jurisdictions to address potential health concerns associated with audible noise. However, in recent years, it has been suggested that infrasound (IS) and low-frequency noise (LFN) could be responsible for the onset of adverse health effects self-reported by some individuals living in proximity to wind turbines, even when audible noise li...
full textLow order physical models of vertical axis wind turbines
Anna E. Craig, John O. Dabiri, and Jeffrey R. Koseff Department of Mechanical Engineering, Stanford University, Stanford, California 94035, USA Department of Civil and Environmental Engineering, Stanford University, Stanford, California 94035, USA and Department of Mechanical Engineering, Stanford University, Stanford, California 94035, USA Department of Civil and Environmental Engineering, Sta...
full textMy Resources
Journal title
volume 8 issue 3
pages 253- 262
publication date 2020-09-01
By following a journal you will be notified via email when a new issue of this journal is published.
Hosted on Doprax cloud platform doprax.com
copyright © 2015-2023