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- W2001350488 abstract "A Computational Aeroacoustic (CAA) study is conducted for the simulation of broad-band trailing-edge noise radiated from a NACA0012 airfoil and a cambered non-symmetricalDU96 airfoil for different ow conditions. The chosen simulation approach uses a ReynoldsAveraged Navier-Stokes (RANS) solution to describe the turbulence around the airfoil.With a stochastic method time resolved synthetic turbulence uctuations are derived whichthen describe the unsteady sound sources used for acoustic perturbation equations (APE).The simulated broadband noise spectra are evaluated for different sets of input parametersto determine the sensitivity of the used method towards these parameters. Calculatedvalues are compared to available measurement data to validate the underlying assumptionsand to give advices on the best practice settings. It is essential for any proper realization ofsound sources from a stochastic method that the RANS turbulence statistics are accuratelyrealized. A length scale smoothing procedure is presented which remedies the problem ofspurious peaks in the realized turbulence statistics. A study is pursued regarding the tur-bulent energy spectra realized by the stochastic turbulence reconstruction. Two differentspectra (Gauss and Liepmann) are analyzed. A positive effect of higher energy levels ofthe Liepmann spectrum in certain frequency ranges on the simulated sound field can beshown." @default.
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- W2001350488 date "2014-06-13" @default.
- W2001350488 modified "2023-09-25" @default.
- W2001350488 title "Generic Airfoil Trailing-Edge Noise Prediction using Stochastic Sound Sources from Synthetic Turbulence" @default.
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- W2001350488 doi "https://doi.org/10.2514/6.2014-3298" @default.
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