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

Yamashita, Rei; Nikiforakis, Nikolaos

doi:10.1007/s00193-023-01125-6

Cited by 2 publications

(1 citation statement)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Nevertheless, other methodologies were studied for the simulation of sonic booms by using CFD to compute the shock waves from reference altitude to the ground, in the far-field domain. For example, Yamashita and Suzuki [14] studied the sonic boom signature on the ground by using just a single CFD domain, which spans from the cruising altitude to the ground instead of using nonlinear equations for the far-field propagation [15]. Those results were in good agreement with flight test data.…”

Section: Introductionmentioning

confidence: 79%

Evaluation of Sonic Boom Shock Wave Generation with CFD Methods

Graziani,

Petrosino,

Jäschke

et al. 2024

Aerospace

View full text Add to dashboard Cite

Over the past two decades, there has been a renewed interest in the development of a new generation of supersonic aircraft for civil purposes that could potentially succeed Concorde. However, the noise annoyance is still considered one of the hampering factors to meet public consensus. This paper aims at revealing the potential of numerical simulations to predict sonic boom signature in Near Field at early design stages. In particular, the paper further demonstrates the applicability of the numerical approach proposed by NASA and other partners during the Sonic Boom Prediction Workshops held between 2014 and 2021, to compute the pressure signature of aircraft in the zone close to it. The results highlight the suitability of the approach (1) to capture the impact of aircraft flight condition variations on the sonic boom signature, (2) to enable the characterization of novel aircraft layout, including Mach 5 waverider configuration, (3) to provide near-field shock wave noise predictions that can be used to evaluate shock propagation, on-ground signature analyses, and annoyance assessment.

show abstract

Section: Introductionmentioning

confidence: 79%

Evaluation of Sonic Boom Shock Wave Generation with CFD Methods

Graziani,

Petrosino,

Jäschke

et al. 2024

Aerospace

View full text Add to dashboard Cite

show abstract

Sonic boom propagation in urban canyons using a combined ray tracing/radiosity method

Riegel,

Sparrow

2024

The Journal of the Acoustical Society of America

View full text Add to dashboard Cite

Sonic boom propagation over land is being studied to ensure a minimal impact on the population in the event that supersonic flight over land becomes permissible. Sonic boom behavior in and around urban areas is particularly important due to the high density of people residing in cities and the increased probability of impacting large numbers of people if urban areas lie in the flight path. This study models sonic booms around urban canyons using a combined ray tracing/radiosity method. The impacts of several parameters, such as diffusion, arrival angle, building heights, and canyon width, on the sound field were explored. The results showed that without diffusion, there was no real trend as the canyon height and width and arrival angles were varied. There were strong shadow zones where no sound was detected as this model does not include diffraction. In other locations, between one and four boom events were received. The resulting perceived level in dB (PLdB) varied from 0 in the shadow zones to 94 dB. Diffuse reflections was the parameter that had the greatest impact on the resulting signatures. Parameters that caused an increased number of reflections showed significant changes in the signature shape and a dramatic reduction in the PLdB.

show abstract

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

Cited by 2 publications

References 34 publications

Evaluation of Sonic Boom Shock Wave Generation with CFD Methods

Evaluation of Sonic Boom Shock Wave Generation with CFD Methods

Sonic boom propagation in urban canyons using a combined ray tracing/radiosity method

Contact Info

Product

Resources

About