Contribution to Book
Reduction of Helicopter BVI Noise Using Active Flow Control: The Case of Vortex Street Interactions
Proceedings of the Applied Aerodynamics Conference
(2012)
Abstract
A novel technique regarding the reduction of helicopter blade-vortex interaction noise is proposed. The proposed technique is based on the idea of injecting air at the leading edge of the blade to alter the vortex characteristics (strength and core size). The numerical investigations are performed using the large-eddy simulation (LES) approach. The simulations were performed for a Reynolds number, Re = 1.3 x 106, based on the NACA0012 airfoil chord and free-stream velocity. The present study shows that by injecting air at the leading edge of the blade, the influence of blade-vortex interaction on the aerodynamic coefficients and aeroacoustic noise is significantly reduced.
Keywords
- Helicopter,
- Helicopter BVI,
- BVI noise,
- Active flow,
- Flow control,
- Vortex street interactions
Disciplines
Publication Date
June 25, 2012
Publisher
American Institute of Aeronautics and Astronautics
ISBN
978-1-62410-185-4
DOI
10.2514/6.2012-3031
Citation Information
Carlos Velez and Marcel Ilie. "Reduction of Helicopter BVI Noise Using Active Flow Control: The Case of Vortex Street Interactions" New Orleans, LAProceedings of the Applied Aerodynamics Conference (2012) Available at: http://works.bepress.com/marcel-ilie/12/