Wind speed effect on the aerodynamics and acoustics of small-scale HAWT; computational studies using IDDES

The aeroacoustics noise is one of the factors that has hindered the use of small-scale wind turbines in the urban/suburban areas. This study contributes a dual aerodynamic-acoustic investigation of a small-scale, urban-relevant HAWT using an IDDES framework. While previous works have typically addressed aerodynamics and acoustics separately, this study uniquely integrates high-fidelity flow prediction with acoustic source identification for small HAWT. By coupling IDDES with an acoustic analogy approach, the present work provides a unified methodology capable of capturing both the complex unsteady flow structures and their associated noise generation mechanisms. This integrated perspective fills a documented gap in the literature and establishes a foundation for improved design and noise-mitigation strategies for small-scale wind energy systems. The studies are performed for three different wind inflow conditions U = 3, 5 and 7 m/s, and five different rotational-speeds of (Formula presented.), 35, 40, 45 and 50rpm. The aerodynamics analysis shows that the lift and drag forces increase with the wind-speed and blade rotational-speed, while the acoustics study shows that the tonal noise increases with the increase of the wind-speed, due to the highly turbulent turbine wake.