On Thursday, September 25, 2003, at 12:40 PM, Bill Clawson wrote:
Hi All,
Whilst browsing through the XCOR Reference Library (accessible through a link on www.xcor.com) I meandered my way over to a nasa tech briefs discussion about vortex fuel mixing for rocket engines.
<http://www.nasatech.com/Briefs/Sept00/MFS31477.html>
The idea sounds pretty cool. Perhaps this could be used in lieu of cooling passages for a bi-prop design. Thoughts?
I like this idea quite a lot, but it has the drawback of creating a net torque on the engine. Running engines in pairs with opposite senses of rotation would solve the problem, or the torque could simply be countered with the RCS.
Another point to consider is that this only solves cooling problems in the chamber itself, not the nozzle or the throat. You might be able to take advantage of the exhaust rotation in order to cool the nozzle by injecting additional fuel just after the throat.
I think the vehicle performance issues caused by the torque are serious enough that it's not a net win over conventional channel wall cooling.
......Andrew
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