A numerical study of a turbulent mixing layer and its generated noise

Liu, Dong; Guo, Li; Zhang, Xing; He, Guowei

doi:10.1007/s11433-013-5098-1

Cited by 4 publications

(2 citation statements)

References 27 publications

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“…Meanwhile, Boudet et al [5] and Seo et al [6] used LES to calculate the sound generated by a cylinder at the Reynolds number 4.6 × 10 4 . Moreover, Orselli et al [7] investigated a similar case at the Reynolds number 9.0 × 10 4 , and Li et al [8] studied the mixing layer noise.…”

Section: Introductionmentioning

confidence: 99%

Large-eddy simulation of circular cylinder flow at subcritical Reynolds number: Turbulent wake and sound radiation

Guo

Zhang

2015

Acta Mech. Sin.

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The flows past a circular cylinder at Reynolds number 3900 are simulated using large-eddy simulation (LES) and the far-field sound is calculated from the LES results. A low dissipation energy-conserving finite volume scheme is used to discretize the incompressible NavierStokes equations. The dynamic global coefficient version of the Vreman's subgrid scale (SGS) model is used to compute the sub-grid stresses. Curle's integral of Lighthill's acoustic analogy is used to extract the sound radiated from the cylinder. The profiles of mean velocity and turbulent fluctuations obtained are consistent with the previous experimental and computational results. The sound radiation at far field exhibits the characteristic of a dipole and directivity. The sound spectra display the −5/3 power law. It is shown that Vreman's SGS model in company with dynamic procedure is suitable for LES of turbulence generated noise.

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Section: Introductionmentioning

confidence: 99%

Large-eddy simulation of circular cylinder flow at subcritical Reynolds number: Turbulent wake and sound radiation

Guo

Zhang

2015

Acta Mech. Sin.

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“…In order to evaluate the possible scaling of energy spectra, we perform DNS [17,22] of compressible and isotropic turbulence with periodic boundary conditions, where an optimized sixth-order compact method and a fourth-order two-step low dissipation and dispersion Runge-Kutta scheme are used to discretize the Navier-Stokes equations. An external force and a uniform cooling are imposed to maintain statistically stationary states.…”

Section: Numerical Results For Compressible Energy Spectramentioning

confidence: 99%

Scaling of energy spectra in weakly compressible turbulence

Dong

2017

Acta Mech. Sin.

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We find an asymptotic expression for the characteristic timescales of decorrelation processes in weakly compressible and isothermal turbulence. This result is used in the Eddy-Damped Quasi-Normal Markovian equation to derive the scalings of compressible energy spectra: (1) if the acoustic waves are dominant, the compressible energy spectra exhibit −7/3 scaling; (2) if local eddy straining is dominant, the compressible energy spectra are scaled as −3. Meanwhile, the energy spectra of incompressible components display the same scaling of −5/3 as those in incompressible turbulence. The direct numerical simulations of weakly compressible turbulence are used to examine the scaling.

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