Determination of the Aerodynamic Characteristics of Vortex Shedding from Lifting Airfoils for Application to the Analysis of Helicopter Noise.

Abstract : A study of vortex shedding from a lifting airfoil has been carried out. The objective of the study was to determine the important parameters affecting vortex shedding from airfoils for application to the study of vortex noise in helicopters. The study was conducted in the UARL acoustic research wind tunnel. Measurements of far-field noise and surface pressure fluctuations were obtained and analyzed for a NACA 0012 airfoil. (Author Modified Abstract)