Dude....

"user314" (user314) 03/06/2019 at 10:23 • Filed to: Planelopnik, NASA, schlieren photo, Supersonic, T-38, beachcraft King Air, trippy

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Using a !!!error: Indecipherable SUB-paragraph formatting!!! and two T-38 trainers, NASA was !!!error: Indecipherable SUB-paragraph formatting!!! Schlieren photos of multiple supersonic aircraft from another aircraft for the first time.

!!!error: Indecipherable SUB-paragraph formatting!!! is a technique used to image the flow of fluids of differing densities, and is useful for understanding shockwaves and sonic booms from supersonic planes. In this case, NASA was able to image the interaction of the shockwaves from two aircraft exceeding Mach 1, which may lead to quieter Mach busters in the future.

Duck Duck Grey Duck FTMFW! > user314 03/06/2019 at 10:52

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That looks so cool!!!!!!! Also your link for Schlieren photography does not work.

user314 > Duck Duck Grey Duck FTMFW! 03/06/2019 at 10:56

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Thanks, fixed.

HammerheadFistpunch > user314 03/06/2019 at 11:30

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Thats a cool shot. Im not aerodynamicist but im not seeing a lot that would give me hope that destructive interference could work to reduce shock wave intensity. It looks like the flow is pretty well independent of one another, even at that close of proximity.  The following craft does see a reduction but it looks pretty minor.  

user314 > HammerheadFistpunch 03/06/2019 at 11:42

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Me either, but then my knowledge of aerodynamics would just fill an Old Fashioned glass , or maybe a tumbler ...

ttyymmnn > user314 03/06/2019 at 12:01

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Fourteen. Hundred . F rames. P er. S econd.

Damn.

user314 > ttyymmnn 03/06/2019 at 12:25

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I was poking around the Wiki while looking up Schlieren photography, and down the rabbit hole I found a link to the Brandaris 128 , which can capture 128 frames at 500*292 pixels each and at a maximum rate   25 million FPS

random001 > HammerheadFistpunch 03/06/2019 at 12:27

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This help?

ttyymmnn > user314 03/06/2019 at 12:28

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Neato.

ttyymmnn > user314 03/06/2019 at 12:31

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That’s just nuts. Did you read about Harold Edgerton ?

HammerheadFistpunch > random001 03/06/2019 at 12:32

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Yeah, I saw that and it certainly does look like there is something to it, but I mean to say there is nothing obviously happening in the wave pattern.

user314 > ttyymmnn 03/06/2019 at 12:50

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I think I know the name from some of his more well-known pictures

I’ll have to read up after while...

ttyymmnn > user314 03/06/2019 at 12:55

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Precisely.

KnowsAboutCars > user314 03/06/2019 at 13:50

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Nice!