Hi Bill,
PDEs are interesting technology with bunch a lot of uncharted territory still.
Frequency, fuels, mechanisms, materials, there’s still a lot to learn. Black
magic too unfortunately and like many things in this business, nobody is
sharing hoping to gain a competitive edge if they have one that works.
One of the characteristics of pulse detonation and pulse combustion engines is
that even though peak combustion temperature can be higher than other means,
NOX production tends to be lower (as an air breather) if designed to optimize
this correctly. The reason is that the peak reactant combustion resident time
is relatively short so NOX doesn’t have time to form. Some heat and boiler
manufacturers have taken advantage of this. Lennox makes a furnace that has a
pulse jet engine (Lo-NOX) as an example. I have a 1M BTU pulse boiler in our
calorimeter wind tunnels as a heat source and have worked on all kinds of wacky
configurations over the years including linear and radial for MHD power
generation as well as propulsion.
It’s just not a major attention getter for now.
Anthony J. Cesaroni
President/CEO
Cesaroni Technology/Cesaroni Aerospace
<http://www.cesaronitech.com/> http://www.cesaronitech.com/
(941) 360-3100 x101 Sarasota
(905) 887-2370 x222 Toronto
From: arocket-bounce@xxxxxxxxxxxxx <arocket-bounce@xxxxxxxxxxxxx> On Behalf Of
William Claybaugh
Sent: Sunday, January 26, 2020 8:23 PM
To: arocket@xxxxxxxxxxxxx
Subject: [AR] Re: Orions and PDEs (was Re: More MAX delays.)
Anthony:
I recently saw a test of a PDE that used a rotating detonation wave. No HF
noise; notably higher performance than the same propellants conventionally
combusted.
Bill
On Sun, Jan 26, 2020 at 5:33 PM Anthony Cesaroni <anthony@xxxxxxxxxxx
<mailto:anthony@xxxxxxxxxxx> > wrote:
Hi Henry,
The first time I got close-up and personal with a PDE was at DRDC Valcartier
when we were working on HEMi. I think you may have been involved with us on
a DND program around that time. The first thing I started discussing with
them was frequency. They were running at a relatively low frequency range
with multiple chambers, mechanical valving and propane as a fuel. I had done
a lot of work previously on pulse combustion at frequencies above 440Hz.
This was around 2004 and had just recently become a US person. Even though I
had worked with DND previously as a Canadian, I got shut down immediately
and was read the ITAR/CGRP riot act. Pratt and Whitney US was working on
higher frequencies with the USAF. They were collaborating with Valcartier
but it had to be done through channels.
I was really interested in pursuing some high frequency concepts with them
but the PM passed away unexpectedly and it was going to be more hassle than
it was worth to get the PDE project added to my US/Canada TAA at the time. I
may revisit it again in the near future.
Is there a similar regulatory firewall between NATO ally countries in
Europe?
Anthony J. Cesaroni
President/CEO
Cesaroni Technology/Cesaroni Aerospace
http://www.cesaronitech.com/
(941) 360-3100 x101 Sarasota
(905) 887-2370 x222 Toronto
-----Original Message-----
From: arocket-bounce@xxxxxxxxxxxxx <mailto:arocket-bounce@xxxxxxxxxxxxx>
<arocket-bounce@xxxxxxxxxxxxx <mailto:arocket-bounce@xxxxxxxxxxxxx> > On Behalf
Of Henry Spencer
Sent: Sunday, January 26, 2020 5:32 PM
To: Arocket List <arocket@xxxxxxxxxxxxx <mailto:arocket@xxxxxxxxxxxxx> >
Subject: [AR] Orions and PDEs (was Re: More MAX delays.)
On Sun, 26 Jan 2020, John Dom wrote:
Orion is a nuclear PDE concept if I understand it correctly.
There are impressive videoclips showing a micro Orion take off using
conventional detonations.
I thought I never read mentioned *how* existing PDEs are built,
technically, on AR.
