Page 6 of 7
Re: Pressure Gain Combustion (Now Proven)
Posted: Sat Sep 13, 2008 4:42 am
by Zippiot
TY for responses, and now I know!
James do you have any more of his work Im having trouble searching patents. I find the ones label'd "weird pulsejet" are the most fun to explore.
Re: Pressure Gain Combustion (Now Proven)
Posted: Sat Sep 13, 2008 5:04 pm
by Irvine.J
I love this one!
Re: Pressure Gain Combustion (Now Proven)
Posted: Mon Sep 15, 2008 12:26 pm
by larry cottrill
Irvine.J wrote:I love this one!
James -
That's one I found back in 2000 when I was doing my own patent searches. There are lots of fascinating little details to this one -- I love the 'way cool' treatment of the intake flares!
L Cottrill
Re: Pressure Gain Combustion (Now Proven)
Posted: Mon Sep 15, 2008 2:13 pm
by Viv
larry cottrill wrote:Irvine.J wrote:I love this one!
James -
That's one I found back in 2000 when I was doing my own patent searches. There are lots of fascinating little details to this one -- I love the 'way cool' treatment of the intake flares!
L Cottrill
Hi Larry
Yes we have it from that period too, he is one of the few people to consider high speed flight and its effects, check his other version with a valved engine too if you haven't already.
Viv
Re: Pressure Gain Combustion (Now Proven)
Posted: Mon Sep 15, 2008 2:26 pm
by Irvine.J
Yeah Larry, seems every time I look at it there something more to see, I think the only thing I haven't seen in it is elvis
He's on the other patent
The depth of the intakes into the CC surprises me the most on this design.
Re: Pressure Gain Combustion (Now Proven)
Posted: Thu Sep 18, 2008 5:43 pm
by Zippiot
Easily my favorite pj found through patents, was under the "many strange valveless" on Leo's site
Re: Pressure Gain Combustion (Now Proven)
Posted: Fri Sep 19, 2008 11:25 am
by larry cottrill
Man, that is a nice one! Check out some of the cool details ... like the ram air collector / augmentor at the tail end. Bodine always seems to be good for some surprising little touches, things that look "gimmicky" at first glance but make sense when you think about them.
L Cottrill
Re: Pressure Gain Combustion (Now Proven)
Posted: Fri Sep 19, 2008 2:57 pm
by Viv
Yes Bodine is worth reading, I used some of his work for the Inline pressure jet that I designed and later was called the Pulseram, but I deliberately only designed it as a burner for use on track side as a switch points heater, I was worried at the time it would be stolen and used as a flight capable engine by some people so I used some of Bodine's ideas and what Eugene Gluhareff had said to limit the combustion pressure, this meant it was only capable of making 4.5 pounds of thrust but have good combustion characteristics for low pollution and heat generation, incidentally it also lowers significantly the noise produced, a very worth while feature in a burner.
Viv
Re: Pressure Gain Combustion (Now Proven)
Posted: Fri Sep 26, 2008 1:00 pm
by luc
I deliberately only designed it as a burner
Was suspected and later corrected with the latest TPRJ20-100
PulseRam as shown on the attached picture and for this is not the only one reccording at hand.
stolen
??????? .... Haaaaaa
Best said ... Financially supported and paid for by more then a million dollar in operations, developments and assets acquisitions costs including close to 3/4 million dollars in pure investments done by 19 shareholders at the time and local organizations STILL, ALL in all due legality and pure honesty ... All documents at hand.
Lucky for them, all flaws as stated above were found and corrected to later bring the product into a viable and commercial one.
Proofs, documents and data well recorded to detract any and worst "Detractors" for it is also guessed the next to come will be about "DAS program being limited or falls", but answers for this too is also at hand.
Such a "Pathetic" situation … So "Predictable" too …
Case rested …
Re: Pressure Gain Combustion (Now Proven)
Posted: Fri Sep 26, 2008 4:05 pm
by Mike Everman
As interested as I am in the details of this conflict, you guys are going to have to take this offline. Attacks will not be tolerated, and this is not a forum to stage a fight. There is obviously a lot of history here, and it is none of our business. Nor should either of you discredit the other or jeopardize the reputation of the other here.
There are always going to be disagreements here, but they must be civil and technical.
Re: Pressure Gain Combustion (Now Proven)
Posted: Fri Sep 26, 2008 4:13 pm
by luc
Mike Everman wrote:As interested as I am in the details of this conflict, you guys are going to have to take this offline. Attacks will not be tolerated, and this is not a forum to stage a fight. There is obviously a lot of history here, and it is none of our business. Nor should either of you discredit the other or jeopardize the reputation of the other here.
There are always going to be disagreements here, but they must be civil and technical.
Fully agree and acknowledged ... Thanks.
Best regards,
Re: Pressure Gain Combustion (Now Proven)
Posted: Tue Oct 07, 2008 7:32 pm
by Viv
The details are fully available any time you want Mike, but it will probably bore you terribly to hear what you probably already guessed (there in french too;-)
The big question for me is when is pressure gain going to be proven? I loved the explanation of what pressure gain is so I cant wait to hear about pressure loss? maybe a leak in the cc or some thing?
Viv
Re: Pressure Gain Combustion (Now Proven)
Posted: Fri Oct 10, 2008 5:21 pm
by Mike Everman
I suggest you both ignore the other in this forum. This sparring is tedious, and the multiple legal posts in multiple places is as well. Please don't use this place as a legal battleground, both of you! I am sorely tempted to lock this topic and be done with it.
Re: Pressure Gain Combustion (Now Proven)
Posted: Wed Nov 19, 2008 3:51 pm
by Viv
Mike Everman wrote:I suggest you both ignore the other in this forum. This sparring is tedious, and the multiple legal posts in multiple places is as well. Please don't use this place as a legal battleground, both of you! I am sorely tempted to lock this topic and be done with it.
Hi Mike
Yes very tedious,
http://www.youtube.com/watch?v=kQFKtI6g ... re=channel
Viv
Re: Pressure Gain Combustion (Now Proven)
Posted: Sat May 23, 2009 6:08 pm
by Viv
Nicole wrote:Zippiot wrote:Sorry to steal the thread a bit Luc but, to Nicole:
Are you sure about the pj not working well under those conditions? Isnt induced flow how you start one and wouldn't it simulate dynamic conditions as if it were mounted on a plane of sorts...
And about the turbine not running well.
Yes the pulsing of the pj would mess with the flow but does the intake really force out that much air to destroy the flow off the comrpessor. Assuming that the pj and turbine have their own fuel source, why couldn't they run together?
Hi Zippiot,
Don't worry about the thread
A free turbine mounted on the exhaust of a pulse jet stay (as I'm concerne) a simple free turbine mounted on the exhaust of a pulse jet.
We know that a valveless pulse jet is a tube open at both ends. What's happens if you put some pressure in the middle of the tube? it rushes out of both ends, I'm right?
We design our engines to have an impedance to that flow at the intake so the preferential flow is out the exhaust (normally).
But put a free turbine attached to the exhaust of a pulse jet, why should the pressure rush out of the exhaust and have to do work turning the turbine, when it could also rush out of the intake and do nothing? It is only the impedance to flow that causes that pressure rise in the cc (the impedance is made up of a few things including acoustics), but the cc pressure will be low.
I guess thats one of the reasons John chose to use a valved engine for his turbo prop experiment.
The problem with a valveless engine it can't generate much in the way of differential pressure as its entirely dependent on the impedance of the intake to back-flow.
It's a basic thermodynamics problem.
You can find interesting those books about fluid & thermodynamics :
Applied Thermodynamics for Engineering Technologists (fifth edition) by T.D. Eastop and A. McConkey at Prentice Hall
Fluid Mechanics by Robert A. Granger at Dover Publications, inc.
This is why Mike wanted to load the compressor to make the turbine work as this would then show the pressure problem in the cc.
Hoping than its help you,
This post has a very useful reference to a thermodynamics book and an explanation of what actually happens when a turbine is fitted to the exhaust of a pulse jet.
Viv