Long range numerical simulation of acoustical shock waves in a 3D moving heterogeneous and absorbing medium

Luquet, David; Marchiano, Régis; Coulouvrat, François

doi:10.1016/j.jcp.2018.11.041

Cited by 18 publications

(8 citation statements)

References 51 publications

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“…for instance, variations from 0.6 to 2.6 psf in (Willshire Jr and Devilbiss, 1992), from 0.8 to 2 psf in (Maglieri et al, 1969), from 1.36 to 2.57 psf in (Hilton et al, 1966). Many numerical simulations also reproduce this kind of waveforms (Averiyanov et al, 2011(Averiyanov et al, , 2006Blanc-Benon et al, 2002;Bradley et al, 2020;Luquet et al, 2019;Stout and Sparrow, 2018).…”

Section: Illustration Of the Propagation Resultsmentioning

confidence: 91%

“…In the present work, the propagation of sonic booms through homogeneous and isotropic kinematic turbulence is computed with FLHOWARD3D software (Luquet et al, 2019).…”

Section: Propagation Model: Flhoward3dmentioning

confidence: 99%

“…It is based on a one-way equation (Coulouvrat, 2012) including diffraction without any angle restriction, non-linearity, wide-angle propagation through scalar and vectorial heterogeneous media, absorption and dispersion by thermoviscosity and molecular relaxation. It has been already validated using comparisons with analytical solutions (Luquet et al, 2019). This method also allows for two-dimensional simulations.…”

Section: Propagation Model: Flhoward3dmentioning

confidence: 99%

“…Its application to sonic boom propagation (Blanc-Benon et al, 2002) has been extended to take into account flows (Averiyanov et al, 2006;Stout et al, 2021;Stout and Sparrow, 2018).A recent model based on the generalized 2D KZK equation (Stout et al, 2021) uses the atmospheric model of Ostashev and Wilson (Ostashev and Wilson, 2015) with height-dependent turbulence parameters. Another approach, so-called FLHOWARD3D method (Gallin et al, 2014), JASA/Propagation of classical and low booms through kinematic turbulence with uncertain parameters (Luquet et al, 2019) developed for both 2D and 3D simulations with a reasonable computational cost, does not suffer from this narrow angle limitation, and can take into account a random 3D turbulent velocity field superimposed to the atmospheric vertical stratification. It is an extension of HOWARD method (Dagrau et al, 2011) which has been recently used for the numerical evaluation of sonic boom deformation due to atmospheric turbulence (Kanamori et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

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Propagation of classical and low booms through kinematic turbulence with uncertain parameters

Leconte

Chassaing

Coulouvrat

et al. 2022

The Journal of the Acoustical Society of America

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The propagation of sonic boom through kinematic turbulence is known to have an important impact on the noise perceived at the ground. In this work, a recent numerical method called FLHOWARD3D based on a one-way approach is used to simulate the propagation of classical and low-boom waveforms. Kinematic turbulence is synthesized following a von Kármán energy spectrum. Two- and three-dimensional (2D and 3D) simulations are compared to experimental measurements, and 2D simulations are found to be slightly less accurate than 3D ones but still consistent with experimental levels around 98% of the time. A stochastic study is carried out on the 2D simulation using the generalized polynomial chaos method with parameters of the von Kármán spectrum as uncertain parameters. Differences between the propagation of a classical N-wave and low booms are observed: the classical N-wave shows higher peak pressure and variations than low-boom signatures. The standard deviation for the peak pressure, the D-weighted sound exposure level (D-SEL), and the perceived level in dB (PLdB) metrics all show a linear increase with the distance, with a faster increase for the classical N-wave for the peak pressure and D-SEL and a similar increase between the different booms for PLdB. In general, it is found that low-boom waveforms show less sensitivity to turbulence.

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Section: Illustration Of the Propagation Resultsmentioning

confidence: 91%

“…In the present work, the propagation of sonic booms through homogeneous and isotropic kinematic turbulence is computed with FLHOWARD3D software (Luquet et al, 2019).…”

Section: Propagation Model: Flhoward3dmentioning

confidence: 99%

Section: Propagation Model: Flhoward3dmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Propagation of classical and low booms through kinematic turbulence with uncertain parameters

Leconte

Chassaing

Coulouvrat

et al. 2022

The Journal of the Acoustical Society of America

Self Cite

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“…One-way wave equation methods are favored when propagation in a turbulent medium is examined (Blanc-Benon et al, 2002;Yuldashev et al, 2017). State-of-the-art simulations (Luquet et al, 2019;Stout and Sparrow, 2019) are now able to consider a threedimensional geometry.…”

Section: Introductionmentioning

confidence: 99%

Characterization of topographic effects on sonic boom reflection by resolution of the Euler equations

Emmanuelli

Dragna

Ollivier

et al. 2021

The Journal of the Acoustical Society of America

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The influence of topography on sonic boom propagation is investigated. The full two-dimensional Euler equations in curvilinear coordinates are solved using high-order finite-difference time-domain techniques. Simple ground profiles, corresponding to a terrain depression, a hill, and a sinusoidal terrain, are examined for two sonic boom waves: a classical N-wave and a low-boom. Ground reflection of the sonic boom is affected by elevation variations: a concave ground profile induces compression, which tends to increase the peak pressure in particular, while the opposite is true for convex elevation variations, which lead to expansion and a reduction in peak pressure. The reflected boom is then strongly altered. Furthermore, a sufficiently concave topography can cause focal zones, which generate extra contributions at ground level in the form of U-waves in addition to the reflected wave. This mechanism has the largest effect on waveforms at ground level. The variations of standard metrics are of a few dBs compared to a flat ground for both sonic boom waves, and they are notably greater for the terrain depression than for the hill. Finally, in the case of a sinusoidal terrain, the pressure waveforms are composed of multiple arrivals due to successive focal zones.

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Three-dimensional full-field simulation of sonic boom emanating from complex geometries over buildings

Yamashita

Nikiforakis

2023

Shock Waves

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Long range numerical simulation of acoustical shock waves in a 3D moving heterogeneous and absorbing medium

Cited by 18 publications

References 51 publications

Propagation of classical and low booms through kinematic turbulence with uncertain parameters

Propagation of classical and low booms through kinematic turbulence with uncertain parameters

Characterization of topographic effects on sonic boom reflection by resolution of the Euler equations

Three-dimensional full-field simulation of sonic boom emanating from complex geometries over buildings

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