In a regular deflagration, the flame front is (relatively) slow so as the
gas is heated it flows away from the flame and expands at constant pressure.
In a detonation, the flame front travels faster than the speed of sound.
The gasses can’t flow away from the flame. They just can’t go that fast.
The Reaction is all done before the gas can go anywhere so the effect is
constant volume heat addition even if the gasses are not held in by any
container. No work is done until after the heat addition is complete.
On Thu, Jan 30, 2020 at 5:31 PM Anthony Cesaroni <anthony@xxxxxxxxxxx>
wrote:
Crickets huh? 😊
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 <arocket-bounce@xxxxxxxxxxxxx> On
Behalf Of Troy Prideaux
Sent: Thursday, January 30, 2020 7:27 PM
To: arocket@xxxxxxxxxxxxx
Subject: [AR] Re: Orions and PDEs (was Re: More MAX delays.)
I'm totally lost with understanding this process. Can anyone describe the
physical mechanism that enables PDEs to "theoretically" operate in a
constant volume process?
Constant volume processes (to me) implies no work done by the working
fluid. Yes there will be higher pressure and temperature outcomes because
there's no work being done - but obviously I'm missing something.
I'm guessing the detonation mechanism somehow uses more available energy
for molecular translation and less going into molecular rotation? I'm
curious to understand the mechanism.
Thanks,
Troy
