Yeah, I'm not familiar with the "critical diameter" and what it means that
it is about 1/4" for liquid nitrous oxide.
Paul M
On Thu, Dec 3, 2015 at 9:41 AM, <snyder@xxxxxxxxxx> wrote:
------------------------------
Date: Wed, 2 Dec 2015 10:13:19 -0700
From: Ben Brockert <wikkit@xxxxxxxxx>
Date: Wed, 2 Dec 2015 16:00:21 -0500
Subject: [AR] Re: ALASA canceled because... Mixed Mono
I downloaded their 22mb catalog, their hardware is all gas phase. For
rocketry you want to know the critical diameter of the liquid. For
pure nitrous it's somewhere around a quarter of an inch, for
nitrous/fuel it's somewhere under a sixteenth. For mixed LOX/Methane I
expect it would also be very very small.
Can someone explain the Detonation Diameter a little better ?
We played this game, I distinctly remember using a desktop CNC to
peck drill 10 thousandths holes in a brass plug to try and muffle the
back prop with mixed N20. (looked like trying ot poke a hair through a
piece of metal). Temperature, Pressure, Flow ? Something seemed to
let it blow through. Can the detonation slam on one side of a
component and just start up on the other side ?
At the time, with one that worked once, the thought was that the
powder in the injector was absorbing and dissipating the energy, and
stopping the detonation, right there.
We ran out of time before we could do to much like ramping up the
engines in a slow and controlled manner hard-ish starts were
assumed.
I guess another question with Detonation Diameter is; How long does the
limited diameter section need to be to snuff it out ? D, 2*D, 10*D ?
-Gar.