You should look up Orbitec's efforts. Vortex injection of propellants around
the insude if the chamber wall.
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On Wed, 14 Mar 2018 at 1:08, Troy Prideaux<troy@xxxxxxxxxxxxxxxxxxxxx> wrote:
Ray,
What you're describing there sounds like a type of film cooling as part of
the injection process. What was specifically mentioned was "vortex combustion".
The only applications I know that utilise vortex combustion are some hybrid
rocket motor applications that utilise vortex injection and combustion to
significantly increase regression rates of the fuels - which is mostly achieved
by the additional heat flux that results from the additional interface
turbulence and boundary layer shear.
Troy
-----Original Message-----
From: arocket-bounce@xxxxxxxxxxxxx [mailto:arocket-bounce@xxxxxxxxxxxxx] On
Behalf Of Ray Rocket (Redacted sender "ar0cketman" for DMARC)
Sent: Wednesday, 14 March 2018 11:50 AM
To: arocket@xxxxxxxxxxxxx
Subject: [AR] Re: engine life (was Re: Nozzles for Amateur Solids)
Troy Prideaux <troy@xxxxxxxxxxxxxxxxxxxxx> wrote:
How would that work? A vortex should increase the heat flux to the wall viaincreased turbulence and pressure.
Vortex flow forces heavier, denser (cooler) materials to the outside.
Lowell Randall told me that Goddard injected water tangentially into the
chamber while using a pintle injector for propellants. The tangentially
injected
water formed an insulating steam blanket. Mr. Randall showed me a tiny
biprop welded from common 2" black pipe fittings that used this method.
Unfortunately, I don't remember the flow proportions.
