Stoichiometric ratio calculation for JP 5000
05-15-2013, 05:32 PM,
 Lalit Active Member Posts: 12 Threads: 7 Joined: Jan 2013 Reputation: 0
Stoichiometric ratio calculation for JP 5000
Dear Technocrats

I am working on HVOF sprayed coatings, especially using JP-5000 torch. I have read that to decrease the particle temperature at roughly constant velocity, stoichiometry is shifted to higher side. I would like to calculate the stoichiometric ratio for following Fuel and oxygen flow rates :
1) Kerosene - 18 slph , Oxygen 1700 scfh.
2) Kerosene- 20 slph, oxygen 1900 scfh.
3) kerosene- 22 slph, oxygen 2100 scfh

Please anyone help me. I really need to understand this term.

regards
05-15-2013, 08:48 PM,
 derek Senior Member Posts: 89 Threads: 7 Joined: Oct 2006 Reputation: 3
RE: Stoichiometric ratio calculation for JP 5000
1 SCFH = 0.4381 NLPM.

1700 scfh is 12.41 NLPH
05-16-2013, 04:59 AM,
 Lalit Active Member Posts: 12 Threads: 7 Joined: Jan 2013 Reputation: 0
RE: Stoichiometric ratio calculation for JP 5000
(05-15-2013, 08:48 PM)derek Wrote: 1 SCFH = 0.4381 NLPM.

1700 scfh is 12.41 NLPH

What is the relation between SLPH and NLPH ? I have seen in one thread (by author Metallurgy_eng) of this forum that JP-5000 manufacturer have designated O2= 800 slpm and fuel = 20 lph combination to lambada=1 (o2/fuel).
Please throw some light on this point also.

regards
06-13-2013, 07:33 PM,
 Intel55 SuperMember Posts: 156 Threads: 45 Joined: Sep 2007 Reputation: 2
RE: Stoichiometric ratio calculation for JP 5000
TAFA has 275 scfh of O2 to one gallon of kero

or

2056 liters to 1 liter kero

I think most use 2.118 for the nlpm to scfh conversion.

nplm is metric and 0*C at 1 atm
slpm is 21*C at 1 atm - usually... it can be 20*C as well

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