Aeroacoustic Investigation of Airfoil Profiles in Turbulence at Moderate Reynolds Numbers Involving the Phased Array Microphone Technique and the Anova Statistical Method

Author:

Lendvai Bálint1,Benedek Tamás1,Balla Esztella1

Affiliation:

1. Department of Fluid Mechanics, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Bertalan Lajos Street 4-6, H-1111 Budapest, Hungary

Abstract

Due to the growing number of drones and unmanned aerial vehicles, the aeroacoustic noise radiated by airfoils in moderate Reynolds-number flows increasingly becomes the focus of interest. In the present paper, the flow-generated noise of two basic (a flat plate and a cambered plate) and two conventional (RAF6 and NACA 0012) airfoil profiles is investigated in an open-jet wind tunnel in the interval of Reynolds numbers between 60,000 and 140,000. The measurements were carried out with a phased array microphone. The measurement data were evaluated using frequency–domain beamforming and the analysis of variance statistical method. The results show that the emitted noise is nearly independent of the angle of attack but dependent on the airfoil geometry and the chordwise location.

Funder

Ministry of Innovation and Technology of Hungary from the National Research Development, and Innovation Fund

Hungarian National Research, Development, and Innovation Centre

National Talent Programme of the Ministry of Human Capacities, Hungary

Publisher

World Scientific Pub Co Pte Ltd

Subject

General Physics and Astronomy,General Mathematics

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