Benefits of curved serrations on broadband trailing-edge noise reduction
نویسندگان
چکیده
منابع مشابه
An experimental study of airfoil instability tonal noise with trailing edge serrations
This paper presents an experimental study of the effect of trailing edge serrations on airfoil instability noise. Detailed aeroacoustic measurements are presented of the noise radiated by an NACA-0012 airfoil with trailing edge serrations in a low to moderate speed flow under acoustical free field conditions. The existence of a separated boundary layer near the trailing edge of the airfoil at a...
متن کاملStatistical Estimation of Turbulent Trailing Edge Noise
A new computational aeroacoustic model suitable for the prediction of turbulent airfoil trailing edge noise is presented. The method (known as the RANS based Statistical Noise Model or RSNM) combines numerically generated, mean turbulence information with a Green’s function for a semi-infinite half-plane to generate a far-field acoustic auto-spectrum. As a preliminary application of the method,...
متن کاملPerformance and mechanism of sinusoidal leading edge serrations for the reduction of turbulence-aerofoil interaction noise
This paper presents the results of a detailed experimental investigation into the effectiveness of sinusoidal leading edge serrations on aerofoils for the reduction of the noise generated by the interaction with turbulent flow. A detailed parametric study is performed to investigate the sensitivity of the noise reductions to the serration amplitude and wavelength. The study is primarily perform...
متن کاملComputation of Trailing Edge Noise with a Discontinuous Galerkin Method
Trailing edge noise of a semi-infinite, thin, flat plate situated in low Mach number flow is computed in two spatial dimensions. The Acoustic Perturbation Equations (APE), which are employed as governing equations, are discretized via a Discontinuous Galerkin Method (DGM). Results are compared with theory and Finite Difference (FD) computations. Next to the radiated sound field, special attenti...
متن کاملTrailing Edge Noise Computation of a Fan Blade Profile
Julien Christophe, Stéphane Moreau, Jérome Anthoine 1 von Karman Institute for Fluid Dynamics, 72 Chaussée de Waterloo, 1640 Rhode-St-Genèse, Belgium, [email protected] 2 Université de Sherbrooke, 2500 Boulevard de l’Université, Sherbrooke, J1K 2R1 Québec, Canada, [email protected] 3 ONERA The French Aerospace Lab, Midi-Pyrenees Center, Mauzac, France, Jerome.Anthoine@one...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Sound and Vibration
سال: 2017
ISSN: 0022-460X
DOI: 10.1016/j.jsv.2017.04.007