Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Numerical computation of airfoil-gust compressible lift response
Submission Author:
Renato Fuzaro Miotto , SP , Brazil
Co-Authors:
William Wolf, Renato Fuzaro Miotto
Presenter: Renato Fuzaro Miotto
doi://10.26678/ABCM.COBEM2017.COB17-0253
Abstract
We propose a numerical framework to compute the airfoil-gust lift response and its subsequent leading-edge noise generation due to an incident compressible turbulent flow. This approach is valid for blades with large aspect ratios, general airfoil geometries, three-dimensional supercritical perturbations and compressible subsonic flows. The linearized equation for unsteady potential flow is rewritten as a Helmholtz equation in the transformed Prandtl-Glauert plane, leading to a boundary value problem prescribed by the linearized airfoil theory. The boundary element method is then employed to solve the Helmholtz equation subjected to a set of boundary conditions representative of the problem. Numerical implementation details are discussed including the implementation of the Kutta condition and the accurate capturing of singularities in the leading- and trailing-edge lift responses.
Keywords
Leading-edge noise, Amiet's theory, Boundary Element Method
