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    Theoretical and Experimental Analysis of Aerodynamic Noise in Small Wind Turbines

    Autor: 
    Dorrego, José R.
    ;
    Ríos, Armando
    ;
    Hernandez-Escobedo, Quetzalcoatl
    ;
    Campos-Amezcua, Rafael
    ;
    Iracheta, Reynaldo
    ;
    Lastres, Orlando
    ;
    López, Pascual
    ;
    Verde, Antonio
    ;
    Hechavarria, Liliana
    ;
    Perea-Moreno, Miguel-Ángel
    ;
    Perea-Moreno, Alberto-Jesus
    Fecha: 
    2021
    Palabra clave: 
    aeroacoustic; aerodynamic profile; boundary layer; noise emission; small wind turbine; sound pressure level; Scopus; WOS(2);
    Revista / editorial: 
    Energies
    Tipo de Ítem: 
    Articulo Revista Indexada
    URI: 
    https://reunir.unir.net/handle/123456789/11554
    DOI: 
    https://doi.org/10.3390/en14030727
    Dirección web: 
    https://www.mdpi.com/1996-1073/14/3/727
    Open Access
    Resumen:
    This paper presents an analysis of sound pressure levels through theoretical modeling and experimental validation in a 1 kW small wind turbine. The models used in the theoretical analysis are BPM (Brooks, Pope, and Marcolini) and BM (Brooks and Marcolini), where wind turbine blades are divided in sections, and each section has its own contribution with respect to the total emitted sound pressure level. The noise propagation study and its experimental validation were accomplished within the requirements of the standard IEC 61400-11 Ed.3 and the standard NOM-081-SEMARNAT- 1994. The comparative study of theoretical and experimental results showed that the BPM and BM methods have a maximum error of 5.5% corresponding to the rated wind speed of 10 m/s. However, at low wind speeds, the theoretical models fit well to experimental data, for example, in the range from 5 to 8 m/s. The experimental data showed that the rotor's aerodynamic noise is more evident at low wind speed, because under these conditions, environmental noise is much less than wind turbine noise. Finally, to prevent possible negative effects on people's health, there is a recommended minimum and suitable distance between small wind turbine installations and buildings.
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