Propagation Analysis Using sBOOM for the Third AIAA Sonic Boom Prediction Workshop

Rallabhandi, Sriram K.

doi:10.2514/1.c036325

Cited by 4 publications

(1 citation statement)

References 34 publications

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“…Unlike characterization of transient point sources such as explosions, analysis of moving sources requires estimation of the likely unknown trajectory of the source as well as its time-varying emission of acoustic energy. Various software tools are available for prediction of sonic booms produced by supersonic sources (e.g., sBoom) (Rallabhandi, 2018). Often, the focus of such tools are on computing the time-domain waveform nearsource and in the "boom carpet" produced by direct-toground propagation to estimate any annoyance or damage that could be caused by the sonic boom (Aftosmis and Nemec, 2014;Doebler et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Prediction of regional infrasound produced by supersonic sources using a ray-based Mach cone source

Blom,

Gammans,

Delbridge

et al. 2024

The Journal of the Acoustical Society of America

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The geometry of the Mach cone produced by a supersonic source is analyzed and mapped into initial conditions used in acoustic ray tracing. The resulting source model is combined with spherical geometry ray tracing methods to enable propagation simulations for infrasonic signals produced by bolides, space debris, rockets, aircraft, and other fast-than-sound sources out to typical infrasonic observation distances of hundreds or thousands of kilometers. Idealized linear and parabolic trajectories typical of bolides and rockets, respectively, are used to demonstrate the calculation of regional infrasonic signals produced by such sources and characteristics of the radiated infrasonic waves are found to vary strongly with the geometry of the trajectory and atmospheric structure. Predicted regional infrasonic signals are compared with those observed from a November 2020 bolide that passed over Scandinavia using a combination of institutionally maintained infrasound stations and “citizen scientist” data from the Raspberry Shake data repository.

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Section: Introductionmentioning

confidence: 99%

Prediction of regional infrasound produced by supersonic sources using a ray-based Mach cone source

Blom,

Gammans,

Delbridge

et al. 2024

The Journal of the Acoustical Society of America

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Recent progress of efficient low-boom design and optimization methods

Han,

Qiao,

Zhang

et al. 2024

Progress in Aerospace Sciences

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Simulation and Regression Modeling of NASA’s X-59 Low-Boom Carpets Across America

Doebler

Wilson

Loubeau

et al. 2023

Journal of Aircraft

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NASA’s X-59 aircraft is predicted to produce a significantly quieter cruise sonic boom than traditional [Formula: see text]-wave-producing aircraft. A propagation simulation study was undertaken to quantify loudness levels, exposure size, and variability of the X-59’s low-boom carpet using realistic atmospheric profiles across the contiguous United States of America (CONUS). Near-field pressure data of the X-59 in supersonic cruise from NASA’s fully unstructured Navier–Stokes three-dimensional (known as FUN3D) computational fluid dynamics code were propagated using NASA’s PCBoom code, which solves an enhanced Burgers equation along acoustic rays. Atmospheric profiles from the National Oceanic and Atmospheric Administration’s Climate Forecast System Version 2 database were used for propagation at 138 locations across the CONUS. Carpets at each location were generated for aircraft headings in the four cardinal directions. Over one million X-59 carpets were generated in total. The effects of the heading, season, geography, and climate zone on boom levels and exposure size are presented. Multiple linear regression models were developed to estimate carpet width and loudness metrics across the CONUS. These results inform regulators and mission planners on expected variations in boom levels and carpet extent from atmospheric variations. Understanding potential carpet variability is important when planning community noise surveys using the X-59.

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Propagation Analysis Using sBOOM for the Third AIAA Sonic Boom Prediction Workshop

Cited by 4 publications

References 34 publications

Prediction of regional infrasound produced by supersonic sources using a ray-based Mach cone source

Prediction of regional infrasound produced by supersonic sources using a ray-based Mach cone source

Recent progress of efficient low-boom design and optimization methods

Simulation and Regression Modeling of NASA’s X-59 Low-Boom Carpets Across America

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