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Hydrogen-oxygen detonations in soap bubbles, video added

 
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Linden.g



Joined: 06 Apr 2009
Posts: 376
Location: PA USA

PostPosted: Wed Jun 26, 2019 4:41 pm    Post subject: Hydrogen-oxygen detonations in soap bubbles, video added Reply with quote

Over the last year I've been exploring Schlieren optics. I built a Z-system out of two Newtonian reflecting telescope mirrors. https://www.facebook.com/photo.php?fbid=705986539741502&set=pb.100009904868801.-2207520000.1561592016.&type=3&theater The ability to visualize sound compression waves and gas density is fascinating. The first image shows the flame front from a 2:1 ratio of hydrogen and oxygen detonated inside a 1 inch soap bubble from the left hand side using a Tesla arc. You can see that the soap film has ripped half way across the bubble. The second images is almost at the same point but was donated from the back. The soap film is ripping towards the camera. The motion was stopped using a 500 ns high speed air gap flash. The monochromatic colour is due to a narrow band pass filter to suppress the light from the explosion.

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Linden Gledhill http://www.flickr.com/photos/13084997@N03/


Last edited by Linden.g on Fri Jun 28, 2019 11:49 am; edited 2 times in total
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Pizzazz



Joined: 28 Nov 2013
Posts: 458

PostPosted: Wed Jun 26, 2019 4:55 pm    Post subject: Reply with quote

impressive!!!
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Linden.g



Joined: 06 Apr 2009
Posts: 376
Location: PA USA

PostPosted: Thu Jun 27, 2019 3:04 pm    Post subject: Reply with quote

Thanks,

A few more closer in showing ripping through the bi-layer and then residue collecting on the opposite side of the detonation point.






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Smokedaddy



Joined: 07 Oct 2006
Posts: 1475
Location: Phoenix, Arizona

PostPosted: Thu Jun 27, 2019 3:58 pm    Post subject: Reply with quote

Very cool, so this your setup then?



-JW:
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Linden.g



Joined: 06 Apr 2009
Posts: 376
Location: PA USA

PostPosted: Thu Jun 27, 2019 4:02 pm    Post subject: Reply with quote

Smokedaddy wrote:
Very cool, so this your setup then?



-JW:


Thanks, that's correct. I'm using an 8 inch and 10 inch mirror. The light source is a 500 ns airgap flash and I have a narrow band pass filter on the camera lens.
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Linden Gledhill http://www.flickr.com/photos/13084997@N03/
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zzffnn



Joined: 22 May 2014
Posts: 1819
Location: Texas USA

PostPosted: Thu Jun 27, 2019 5:50 pm    Post subject: Reply with quote

Great work, Linden. Thank you for sharing. My head is exploding from imagining the complexity and danger of this imaging venture of yours Twisted Evil

How did you precisely control of amount of hydrogen and oxygen mix, inside a soap bubble? I did not know you can buy those gases as a private individual. Solid rocket power may be easier to buy from Hobby Lobby.
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mawyatt



Joined: 22 Aug 2013
Posts: 2228
Location: Clearwater

PostPosted: Thu Jun 27, 2019 8:19 pm    Post subject: Reply with quote

Interesting stuff indeed!!

I suspect the H2 and O2 can be created with simple electrolysis, or just H2 with pool acid (dilute HCL often called Muratic) and Zinc.

Might be electrolysis in soapy water to create the bubble mixtures of H2 and O2.

Very cool setup and images!!

Best,
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Linden.g



Joined: 06 Apr 2009
Posts: 376
Location: PA USA

PostPosted: Fri Jun 28, 2019 11:48 am    Post subject: Reply with quote

mawyatt wrote:
Interesting stuff indeed!!

I suspect the H2 and O2 can be created with simple electrolysis, or just H2 with pool acid (dilute HCL often called Muratic) and Zinc.

Might be electrolysis in soapy water to create the bubble mixtures of H2 and O2.

Very cool setup and images!!

Best,


I'm using a "water torch" electrolysis hydrogen/oxygen generator
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Linden Gledhill http://www.flickr.com/photos/13084997@N03/
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Linden.g



Joined: 06 Apr 2009
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Location: PA USA

PostPosted: Fri Jun 28, 2019 11:48 am    Post subject: Reply with quote

Here is what it looks like in high speed video https://www.facebook.com/100009904868801/videos/832499530423535/?id=100009904868801

https://www.facebook.com/100009904868801/videos/vb.100009904868801/834180190255469/?type=2&video_source=user_video_tab
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Linden Gledhill http://www.flickr.com/photos/13084997@N03/
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Smokedaddy



Joined: 07 Oct 2006
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Location: Phoenix, Arizona

PostPosted: Fri Jun 28, 2019 12:26 pm    Post subject: Reply with quote

... wow, very nice. Thanks for the links.
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