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- W2038809752 abstract "Jet pumps, which are considered in the framework of this study as simple jets confined in ducts, could be a significant ally in the mission of the aeroacoustic community to make the aircraft more environmentally friendly. Despite the significant gains that it could bring for various functions of the systems of the engines, such devices could contribute directly to ramp noise. Therefore, a predictive code of the noise radiated by these configurations could be a useful tool to propose noise reduction solutions. A numerical tool, designed for acoustic prediction of confined jets, is presented in this paper. The proposed method is adapted to industrial requirements since it is easily implementable and applicable to any 3D configuration. The acoustic propagation is obtained by computing the response of the linearized Euler equations, enforced by a non-linear source term calculated with a stochastic velocity field synthetized from the sweeping based turbulence generation process proposed by Lafitte et al. [AIAA 2011-2088]. The chosen formulation is validated by computing test cases including simple dipole and quadrupole distributions. The predictive tool is then applied to a cold free jet configuration at Mach number M=0.72. Preliminary computations show that the forcing of the linearized Euler equations by a stochastic source term appears to be a complex operation since far-field acoustic spectra levels are overestimated. An accurate calibration method of the acoustic source term is therefore introduced in the present work." @default.
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- W2038809752 date "2012-06-04" @default.
- W2038809752 modified "2023-10-05" @default.
- W2038809752 title "Prediction of subsonic jet noise relying on a sweeping based turbulence generation process" @default.
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- W2038809752 doi "https://doi.org/10.2514/6.2012-2149" @default.
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