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File:Shockwave pattern around a T-38C observed with Background-Oriented Schlieren photography (1).jpg

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Summary

Description
English: Air-to-air photography of a Northrop T-38 Talon in supersonic flight over the Mojave Desert reveals air density changes caused by flow regime transition around the aircraft, and the turbulent exhaust of the aircraft’s jet engines.
This photo was acquired using a technique named Air-to-air Background-Oriented Schlieren (AirBOS). The process involves imaging with a high-speed camera mounted on the bottom of a Beechcraft B-200 King Air aircraft while the T-38C passes underneath. The pattern formed by the desert ground underneath the aircraft is filmed separately, and then removed digitally from the captured images during post-processing. This reveals the distortions created by the shockwaves, which result from the change in the air’s refractive index caused by density changes.
Deutsch: Luftbildfotografie einer Northrop T-38 Talon beim Überschallflug über der Mojave-Wüste. Sie zeigt Änderungen der Luftdichte, die durch die Strömungsbeeinflussung durch das Flugzeug und die turbulenten Abgase der Triebwerke des Flugzeugs verursacht werden.
Dieses Foto wurde mit der "AirBOS"-Technik (Air-to-Air Background-Oriented Schlieren) aufgenommen. Der Prozess umfasst die Bildgebung mit einer Hochgeschwindigkeitskamera, die an der Unterseite einer Beechcraft B-200 King Air angebracht ist, während die T-38-Talon unter ihr fliegt. Das vom Wüstenboden unter dem Flugzeug gebildete Muster wird separat aufgenommen und dann während der Nachbearbeitung digital aus den diesen Bildern entfernt. Dies offenbart die durch die Stoßwellen verursachten Verzerrungen, die sich aus der Änderung des Brechungsindex der Luft aufgrund von Dichteänderungen ergeben.
Date
Source https://www.nasa.gov/centers/armstrong/features/shock_and_awesome.html
Author NASA & US Air Force: J.T. Heineck / Ed Schairer / Maj. Jonathan Orso / Maj. Jeremy Vanderhal

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Public domain This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)
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Captions

A T-38 Talon is photographed from above using a technique that allows the air compression around the plane to be seen.

inception

February 2015

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image/jpeg

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current06:15, 30 August 2015Thumbnail for version as of 06:15, 30 August 20154,307 × 2,400 (578 KB)AriadacapoUser created page with UploadWizard

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