Open Access
Preliminary airborne measurements for the SR-71 sonic boom propagation experiment
TLDR
In this paper, an SR-71 aircraft generated sonic booms at ground level and atmospheric data were recorded for each flight, at altitude of 31,000 to 48,000 ft, and at various gross weights.Abstract:
SR-71 sonic boom signatures were measured to validate sonic boom propagation prediction codes. An SR-71 aircraft generated sonic booms from Mach 1.25 to Mach 1.6, at altitudes of 31,000 to 48,000 ft, and at various gross weights. An F-16XL aircraft measured the SR-71 near-field shock waves from close to the aircraft to more than 8,000 ft below, gathering 105 signatures. A YO-3A aircraft measured the SR-71 sonic booms from 21,000 to 38,000 feet below, recording 17 passes. The sonic booms at ground level and atmospheric data were recorded for each flight. Data analysis is underway. Preliminary results show that shock wave patterns and coalescence vary with SR-71 gross weight, Mach number, and altitude. For example, noncoalesced shock wave signatures were measured by the YO-3A at 21,000 ft below the SR-71 aircraft while at a low gross weight, Mach 1.25, and 31,000-ft altitude. This paper describes the design and execution of the flight research experiment. Instrumentation and flight maneuvers of the SR-71, F-16XL, and YO-3A aircraft and sample sonic boom signatures are included.read more
Citations
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Proceedings ArticleDOI
Origins and Overview of the Shaped Sonic Boom Demonstration Program
TL;DR: In 2003, the DARPA Shaped Sonic Boom Demonstration (SSBD) program demonstrated that the shape of the shock wave signature emanating from an F-5E aircraft can be substantially reduced by incorporating specialized aircraft shaping techniques as discussed by the authors.
Journal ArticleDOI
Review and prospect of supersonic business jet design
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Innovation in Flight: Research of the NASA Langley Research Center on Revolutionary Advanced Concepts for Aeronautics
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Proceedings ArticleDOI
Airborne Shaped Sonic Boom Demonstration Pressure Measurements with Computational Fluid Dynamics Comparisons
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TL;DR: The Shaped Sonic Boom Demonstration project showed for the first time that by careful design of aircraft contour the resultant sonic boom can maintain a tailored shape, propagating through a real atmosphere down to ground level as mentioned in this paper.
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References
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Proceedings ArticleDOI
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TL;DR: In this paper, the authors describe ground-level measurements of sonic boom signatures made as part of the SR-71 sonic boom propagation experiment recently completed at NASA Dryden Flight Research Center, Edwards, California.
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