Author Topic: Hydrazine as oxidizer?  (Read 937 times)

Hydrazine as oxidizer?
« on: 11/13/2022 10:56 pm »
I just used the CEARUN program online, and got some unexpected results when I put Diborane as fuel, and Hydrazine as oxidizer (pressure inside combustion chamber at 99 atm).  The maximum Isp I got, was more than 400 seconds!  I understand that when Boron and Nitrogen atoms combine, a lot of energy is released but I suspect there is something wrong with CEARUN... or isn't there?

A file with the results from CEARUN, is attached.

Offline edzieba

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Re: Hydrazine as oxidizer?
« Reply #1 on: 11/24/2022 02:00 pm »
p.125 onwards of John D. Clarke's excellent Ignition! covers Diborane-Hydrazine.
Short version: getting good mixing for efficient combustion is difficult, dealing with the solid exhaust products is difficult, and by the time those two problems were tackled the CIF5-Hydrazine combination had been discovered with the same performance for much less hassle and lower cost (and when then Chlorine-Flourine compounds are the easy option then you have probably gone wrong already).

Offline Proponent

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Re: Hydrazine as oxidizer?
« Reply #2 on: 11/24/2022 05:08 pm »
It's "fluorine" rather than "flourine," please.

Offline laszlo

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Re: Hydrazine as oxidizer?
« Reply #3 on: 11/25/2022 11:32 am »
It's "fluorine" rather than "flourine," please.

Innovative new fuel to get the support of the American Farm Lobby. Exhaust product is breakfast cereal.

Offline Barley

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Re: Hydrazine as oxidizer?
« Reply #4 on: 11/26/2022 08:13 pm »
While we're at it it's Cee-ell-Eff-five not Cee-Eye-Eff-five.  Apparently, somebody is using a sans-serif font.


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