On the Simulation of Aerodynamic Noise With Different Turbulence Models

Huang, Xin; Schäfer, Michael

doi:10.7712/100016.2356.7445

Cited by 1 publication

(1 citation statement)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A study conducted by Huang and Schafer [26] compared the noise predictions by different turbulence models (URANS and LES) for flow over an airfoil with an inlet velocity of 68.6 m/s, which is well inside the incompressible regime. The nozzle jet acoustics are predominantly characterized by the sources of noise in the free shear layer.…”

Section: Introductionmentioning

confidence: 99%

Acoustic Modeling of Compressible Jet from Chevron Nozzle: A Comparison of URANS, LES and DES Models

et al. 2022

View full text Add to dashboard Cite

Chevron nozzles, which are characterized by the serrations at the nozzle exit, are widely used for suppressing jet noise in aircraft engines. The noise suppression is accomplished by the enhanced mixing of the exhaust streams, which, in turn, is a result of the streamwise vorticity induced by the serrations. The present study focuses on the numerical modeling of the acoustic field in a compressible jet issuing from a chevron nozzle at a Mach number of 0.8. The study evaluates the effectiveness of turbulence modeling approaches of Large Eddy Simulation and Detached Eddy Simulation methods and compares them with the less computationally intensive Unsteady Reynolds Averaged Navier–Stokes (URANS) formulation. The Ffowcs Williams–Hawkings noise model was used to predict the overall sound pressure level in the far field. The LES predictions of the acoustic signature were found to match well with the experimental data, whereas the URANS model grossly underpredicted the sound pressure levels in the compressible jet flow field.

show abstract

Section: Introductionmentioning

confidence: 99%