When I commented (couple of weeks ago?) I mentioned multistage preburners.
If we take as given that HTP liquid takes a lot of energy to react then we just
stage things to it has that energy. Decompose small HTP stream. Add fuel to
moderate excess so it burns to hot fuel rich output gas, hot enough to
decompose more HTP. Add more HTP, enough to burn all the fuel and vaporize all
the HTP. Run into chamber, add fuel at top and then more peroxide.
Not working dumping it in all at once does not mean can't work.
Sent from my iPhone
On Aug 27, 2016, at 9:28 AM, qbert@xxxxxxxxxxxxxxx wrote:
Jon
The authors heated the stream using the device on page 5. developed from
patent by W.B. Watkins; Patent #US 6,532,741 B2; March 18, 2003).
Figure 1 shows a HTP decomposer patented by Pratt & Whitney The decomposer
first catalytically decomposes HTP in a chamber marked as ‘A’.
Additional HTP is introduced via secondary injectors (323 and 319) into the
chamber ‘B’.
Along with NASA, Paul Breed, I believe Armadillo, a few unnamed others and
myself have all used decomposed HTP to autoignite kerosene (in addition to
other fuels) from a decomposed HTP stream, there is no augment about that.
The discussion was, could one start a peroxide kerosene motor by first
decomposing the peroxide and then adding the fuel, and then switch over to
pure undecomposed peroxide and fuel to continue the run.
The paper shows that the adding of even small amounts of raw peroxide into a
hot decomposed stream has detrimental effects on the stream. The big variable
here is there was no kerosene used in these experiments. My contention is,
and we saw this on a few of out trial runs is that we almost always had a
flameout if the catalyst failed. One exception to this was a on a long run
the chamber was very hot when the catalyst failed and the motor continued to
do the full intended run. In our catalyst failures the catalyst still
decomposed some but not of the peroxide. Our team surmised, (we never proved
it one way or the other). That heat was been drawn away from the stream to
such an extent that the fuel could no longer ignite.
I also contend that if it was that simple to use a raw peroxide flow with a
fuel it would have been done a long time ago.
Robert
At 06:53 AM 8/27/2016, you wrote:
Robert qbert@xxxxxxxxxxxxxxx wrote on 250816:<US06532741-20030318-D00000.jpg>
I agree with you on adding fuel into ...
http://www.dtic.mil/dtic/tr/fulltext/u2/a424289.pdf
I at last hastily read your att. reference, the 2004 "paper" by Sentgupta &
al.. Of course HP can be decomposed by heating, boiling, igniting, ... it
without a catalyst. When evaporating HP to HTP atmospherically in lab or in
the field, the vapor above the liquid typically can go bang as soon as it is
enriched to 40 wt % of HP. Not in the garage.
As to how the authors would heat an HTP stream their chamber, tube, coil,
or ... for it to flow-decompose so no cat pack is required: I found no
mention of that.
In the meantime and more recently, similar studies achieved such thermally
decomposed HTP to a flow of kerosene. Incl. a demo video in a research
hangar. Purdue? I lost the website.
jd
