High-Pressure Combustion Research: Investigating Spherical Flame Expansion

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jaap de vries
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Hey Y'all,

As some of you might know I do combustion research I took high speed images of a spherically expanding flames. Look what happens at high pressure.

The flame brakes up into cells. Is there anybody that is a photo expert and that can give me advise on how to improve these images?

Jaap
 

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That image looks pretty good as-is. Nice even background illumination, good contrast, good focus. What kind of improvement are you looking for?
 
Thanks Andy,

I thought it came out OK too.

This is my first experience doing a combination of schlieren with high speed photography so I thought maybe there are people that could give me general hints etc.

Jaap