Jean Al-Am
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View article: Direct-Noise of an Ultrahigh-Bypass-Ratio Turbofan: Periodic-Sector vs Full-Annulus Large-Eddy Simulations
Direct-Noise of an Ultrahigh-Bypass-Ratio Turbofan: Periodic-Sector vs Full-Annulus Large-Eddy Simulations Open
The tonal and broadband noise of an ultrahigh-bypass-ratio fan stage, which has been developed at École Centrale de Lyon, is studied using large-eddy simulations (LES). Wall-modeled LES of a periodic sector and a 360-deg full fan stage hav…
View article: Direct noise predictions of a 360° full fan stage using LES
Direct noise predictions of a 360° full fan stage using LES Open
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View article: Aeroacoustic analysis of the tip-leakage flow of an ultrahigh bypass ratio fan stage
Aeroacoustic analysis of the tip-leakage flow of an ultrahigh bypass ratio fan stage Open
A detailed aeroacoustic analysis of the flow induced by the clearance between the fan tip and the shroud is performed in a scale-model fan stage of an ultrahigh bypass ratio turbofan engine, which was designed to operate at transonic regim…
View article: Prédictions du bruit à large bande d’un étage de soufflante en utilisant des simulations aux grandes échelles
Prédictions du bruit à large bande d’un étage de soufflante en utilisant des simulations aux grandes échelles Open
Decreasing the noise emitted by turbofan engines is now one of the main constraints for aircraft engine manufacturers. The fan/Outlet Guide Vane (OGV) stage is considered as one of the major contributors to the total noise radiated by aero…
View article: Direct noise predictions of fan broadband noise using LES and analytical models
Direct noise predictions of fan broadband noise using LES and analytical models Open
In the present study, we analyze the broadband noise of an ultra high by-pass ratio fan/OGV stage developed at Ecole Centrale de Lyon. Wall-modeled large eddy simulations (LES) of a periodic fan/OGV sector are performed at approach conditi…
View article: A Parametric Study on the LES Numerical Setup to Investigate Fan/OGV Broadband Noise
A Parametric Study on the LES Numerical Setup to Investigate Fan/OGV Broadband Noise Open
In the present paper, large eddy simulations are performed to study two different mechanisms of Fan/OGV broadband noise: airfoil self-noise and turbulence interaction noise. Firstly, the current study focuses on the prediction of airfoil s…