Sonic Boom Carpet Computation as a Basis for Supersonic Flight Routing

Liebhardt, Bernd

doi:10.2514/6.2019-3387

Cited by 7 publications

(9 citation statements)

References 16 publications

(21 reference statements)

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“…by considering only one instance in time [32], averaging atmospheric profiles across years [31], sampling a sparse selection of days throughout the years [3,30], evaluating only locations on the flight path [32,34,35], or selecting locations that are representative of different climates [31,33]. However, this study proposes a broader analysis of atmospheric states, allowing analysis of other factors previously not studied and validating previous results from the available literature.…”

Section: A)mentioning

confidence: 68%

“…Thus, the effects of sonic booms can be mitigated through maneuvering. The flight path can be optimized preflight to not allow the sonic boom carpet to be strictly over water [32] or to alternate to quieter flight conditions over populated regions [50]. Moreover, in-flight maneuvers can also add another layer of control to compensate for unexpected atmospheric variations [51].…”

Section: A Maneuvering (Trl 3)mentioning

confidence: 99%

“…Prior studies, as shown in Fig. 2, simplified the domain exploration by reducing the number of evaluated time instances [3,[30][31][32] or locations [30,33]. The domain can be reduced b)…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effects of Atmospheric Profiles on Sonic Boom Perceived Level from Supersonic Vehicles

Leal¹,

Schrass²,

Giblette³

et al. 2021

AIAA Journal

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U.S. national research priorities include reducing the disruption caused by sonic booms, which hindered the economic viability of supersonic aircraft in decades past. However, shock waves are unavoidable during supersonic flight; and exposure of people, animals, and structures to these shock waves on the ground cannot be eliminated entirely. It is herein shown that changing atmospheric conditions, gusts, and heights above ground can result in any supersonic aircraft that is acceptably quiet at specific atmospheric conditions becoming uncomfortably loud in other flight conditions. These performance variations are noticeable for periods ranging from 12 h to one year across the continental United States of America. Therefore, strategies to actively mitigate sonic booms may become necessary as researchers work toward resumption of overland commercial supersonic flight.

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Section: A)mentioning

confidence: 68%

Section: A Maneuvering (Trl 3)mentioning

confidence: 99%

See 1 more Smart Citation

Effects of Atmospheric Profiles on Sonic Boom Perceived Level from Supersonic Vehicles

Leal¹,

Schrass²,

Giblette³

et al. 2021

AIAA Journal

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show abstract

“…The preliminary supersonic route networks for Japan and Paris are shown in Figure 7 and Figure 8, respectively. h We considered also taking into account sonic boom carpets, as described in [14], but decided that it would not appreciably improve the study's outcome.…”

Section: Methodology Of Market Assessmentmentioning

confidence: 99%

JAXA's S4 Supersonic Low-Boom Airliner – A Collaborative Study on Aircraft Design, Sonic Boom Simulation, and Market Prospects

Liebhardt

Lütjens

Ueno

et al. 2020

Aiaa Aviation 2020 Forum

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In this work, the design methodologies and technical rationales for the design of JAXA's low-boom S4 (System integration of Silent SuperSonic airplane technologies) airliner are detailed with a focus on aerodynamic engine-airframe integration with respect to efficiency and sonic-boom abatement, respectively. The approach to high-fidelity CFD grid generation, flow simulation, and signature propagation for sonic boom assessment is explained, resulting in sonic-boom data maps with respect to flight physics parameters. Thereafter, DLR inserts the aircraft in operational scenarios for supersonic overland prohibition and permission, respectively, based on forecasted origin-destination passenger demand. Overwater flight routes are designed for the restrictive scenario, and the S4's flight performance data are used to simulate flight missions on all routes, yielding flight durations. Eventually, the respective market sizes for S4-type airliners are estimated and discussed.

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“…The capability of simulating and optimizing this so-called Mach-cutoff 4 flight was implemented in DLR's proprietary SuperTraC (supersonic trajectory calculator) environment (also see [4,5]). In its basic version, the code simulates subsonic, supersonic, and mixed missions from takeoff to touchdown, numerically solving the equations of motion and accounting for fuel consumption as well as airplane mass change, respectively.…”

Section: Implementation Of Mach-cutoff Flight Simulationmentioning

confidence: 99%

Supersonic Overland Without a Sonic Boom – Quantifying the Speed Advantage of Mach-Cutoff Flight

Liebhardt

Linke²,

Knaack³

2021

Aiaa Aviation 2021 Forum

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When flying at low supersonic speeds, rising temperatures and convenient winds can deflect the sonic boom shock waves so that they do not reach the ground. This work presents a computation methodology that incorporates atmospheric sonic ray tracing, topography, and realistic 3-D atmospheres in order to optimize supersonic overland cruise with respect to speed. Flight missions are simulated on several suitable city pairs using numerous atmospheric conditions. Flight times and fuel consumption are compared to subsonic high-speed missions.

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Sonic Boom Carpet Computation as a Basis for Supersonic Flight Routing

Cited by 7 publications

References 16 publications

Effects of Atmospheric Profiles on Sonic Boom Perceived Level from Supersonic Vehicles

Effects of Atmospheric Profiles on Sonic Boom Perceived Level from Supersonic Vehicles

JAXA's S4 Supersonic Low-Boom Airliner – A Collaborative Study on Aircraft Design, Sonic Boom Simulation, and Market Prospects

Supersonic Overland Without a Sonic Boom – Quantifying the Speed Advantage of Mach-Cutoff Flight

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