Large eddy simulation of airfoil self-noise using OpenFOAM

Purpose The purpose of this paper is to investigate airfoil self-noise generation and propagation by employing a hybrid method based on the Large-eddy simulation (LES) approach and Curle’s acoustic analogy as implemented in OpenFOAM. Design/methodology/approach Large-eddy simulation of near-field flow over a NACA6512-63 airfoil at zero angle of attack with a boundary layer trip at Re = 1.9 × 105 has been carried out using the OpenFOAM® CFD code. Calculated flow results are compared with published experimental data. The LES includes the wind-tunnel installation effects by using appropriate inflow boundary conditions obtained from a RANS k-ω SST model computation of the whole wind tunnel domain. Far-field noise prediction was achieved by an integral method based on Curle’s acoustic analogy. The predicted sound pressure levels are validated against the experimental data at various frequency ranges. Findings The numerical results presented in this paper show that the flow features around a NACA6512-63 airfoil...

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