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July 31, 2006
Schlieren photography, anyone? anyone?
There was a cool photograph in High Mach of a Schlieren photograph showing the boundaries of turbulent vs. viscous flow around an alien landing craft they're testing in a hypersonic wind tunnel.
A Schlieren photograph allows you to see the graduations in air density that are not normally visible to the naked eye. For instance, this is an F-14 Tomcat breaking the sound barrier at sea-level between two ships. But this Schlieren photograph of a T38 gives you a better visual representation of what the shock waves actually look like.
Posted by Peenie Wallie on July 31, 2006 at 3:51 PM
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