[AR] Re: engine life (was Re: Nozzles for Amateur Solids)
- From: Henry Spencer <hspencer@xxxxxxxxxxxxx>
- To: Arocket List <arocket@xxxxxxxxxxxxx>
- Date: Tue, 13 Mar 2018 21:51:13 -0400 (EDT)
On Wed, 14 Mar 2018, Troy Prideaux wrote:
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 original poster was probably thinking of Orbitec's concept of
injecting one propellant in an *upward* vortex along the wall, to mix with
the other propellant at the top and burn down the center. This lets you
use all of one propellant, whereas with standard film cooling you have to
use an absolute minimum of coolant flow because much of it won't get a
chance to burn.
The stability of such vortex flow, unfortunately, can't be taken for
granted (as with film cooling in general), although with lots of coolant
you've got bigger margins.
Henry
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