Broadband noise prediction of trailing edge noise caused by a turbulent boundary layer using an Improved Delayed Detached Eddy Simulation (IDDES) - Archive ouverte HAL
Communication Dans Un Congrès Année : 2009

Broadband noise prediction of trailing edge noise caused by a turbulent boundary layer using an Improved Delayed Detached Eddy Simulation (IDDES)

Résumé

Noise generated by a highly loaded (15 degree) and chambered NACA 5510 airfoil at a chord based Reynolds number of aprox. 1 million placed in a quiet parallel low Mach number flow (Ma = 0.2) is studied numerically using a novel variant of the DES - the Improved Delayed Detached Eddy Simulation (IDDES). The flow is fully attached to the airfoil and therefore only the small turbulent boundary structures that interact with the trailing edge generate significant broadband noise in the far field. The IDDES approach is designed to extend the LES region of the original DES approach (hybrid RANS/LES) from Spalart et. al. (1997) to the turbulent boundary layer, as proposed first by Travin et. al. in 2006. The non-zonal blending occures therefore inside the boundary layer - the RANS model acts as a wall model for the LES. The actual work shows the capabilities of this novel approach for the simulation of broadband noise for attached flows. The simulation is compared to measurements from the EC Lyon including PIV and LDA data around the airfoil and unsteady on-wall pressure measurements near the trailing edge and far field sound data.
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Dates et versions

hal-03923515 , version 1 (04-01-2023)

Identifiants

  • HAL Id : hal-03923515 , version 1

Citer

Björn Greschner, Frank Thiele, Julien Grilliat, Marc Jacob. Broadband noise prediction of trailing edge noise caused by a turbulent boundary layer using an Improved Delayed Detached Eddy Simulation (IDDES). 16th International Congress on Sound and Vibration (ICSV 16), Jul 2009, Krakow, Poland. pp.2096. ⟨hal-03923515⟩

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