Oxygen amounts...

SpudFiles

Rules

Chat

FAQ

Memberlist

How-To

Other

Private Messages

Random Cannon

Recent topics

» Homemade 3-way
by wyz2285 on 02/08/2012 13:51 PM

» PAC WithOutLoss
by Petitlu on 02/08/2012 12:09 PM

» Stainless Steel Pen Gun -
by killerbanjo on 02/08/2012 11:47 AM

» Green gas/co2 sniper mech
by Gippeto on 02/08/2012 11:29 AM

» 3/2 valve as main valve?
by wyz2285 on 02/08/2012 11:14 AM

» QEV for pneumatic claymor
by sharpshooter11000 on 02/08/2012 9:44 AM

» Spud Gun Fired By Preside
by PVC Arsenal 17 on 02/08/2012 9:36 AM

Donate

Why Donate?

	Hi Guest! As you're not registered, some features could be unavailable. Click here if you want to become a member of SpudFiles
	Username: Password: Log me on automatically each visit

SpudFiles Forum Index » Hybrid Cannon Discussion » Oxygen amounts...

Oxygen amounts...

« View previous topic :: View next topic »

Author

Message

deathbyDWV

Posted: 02/03/2010 21:27 PM Post subject: Oxygen amounts...

Colonel

Joined: 16 May 2009
Posts: 577
813.12 Spud Bux

Alright, so I have a question about my oxygen for my new hybrid.

For this post I'm going to say that:

air is 20% oxygen and 80% nitrogen

atmosphereic pressure is 15 psi

that's just to make things simple...

So the chamber will be filled with air. 1 part oxygen and 4 parts nitrogen.
I want it to have 5 parts oxygen for a five times mix.
So if I fill the chamber with 11.25 psi oxygen(chamber pressure) that would add 4 parts of oxygen.

Now I would have 5 parts oxygen and 4 parts nitrogen. (if I did maths right)
Then I would add 5x mapp fuel.
My question is, with this mixture, including the nitrogen in the chamber still, would it fire correctly? Or would I have to purge it somehow and remove the extre nitrogen.

Thanks in advance...

artillerycreations

Posted: 02/03/2010 21:58 PM Post subject:

Specialist

Joined: 23 Dec 2009
Posts: 46
169.79 Spud Bux

Yes it would burn just fine. Instead of charging with 5x worth of air at whatever pressure you need you are eliminating the extra nitrogen. Since you are just getting rid of extra non reactive gasses it would burn but not with the same characteristics. Due to lack of a "buffer gas" so to speak your flame front will travel faster and therefore a faster pressure spike and more peak power because of less time for chamber walls to absorb heat which in our case is power.

I describe the chamber as a sponge (on a molecular scale of course). With all that nitrogen in there the flames have to travel around the nitrogen molecules being the gaps in the sponge. Without that nitrogen or in your case a limited amount, the flame front will have little resistance. I hope that helps.

deathbyDWV

Posted: 02/03/2010 22:31 PM Post subject:

Colonel

Joined: 16 May 2009
Posts: 577
813.12 Spud Bux

Yes that helps. Thanks. That is what I was thinking but I wasn't sure. Now I won't have just purge the tank. I like the sponge comparison is good too.

inonickname

Posted: 02/04/2010 6:09 AM Post subject:

Major General

Joined: 07 Dec 2008
Posts: 2486
6551.71 Spud Bux

You should also do a search on oxygen hazards.. Not something safe to work with.

deathbyDWV

Posted: 02/04/2010 6:55 AM Post subject:

Colonel

Joined: 16 May 2009
Posts: 577
813.12 Spud Bux

Yes I've done lots searching and reading on oxygen hazards. The most pressure the oxygen will experience outside of the tank is under 15 psi. That shouldn't be enough for any auto ignition or anything. Thanks for your concern though.

Display posts from previous:

SpudFiles Forum Index » Hybrid Cannon Discussion » Oxygen amounts...

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum