John:
In the past, I've just put a thermal barrier between the graphite and it's
carrier shell; fiberglass works well.
I've wondered if one could use the back of the stage--including the
fins--as a radiator but have never built a detailed thermal model. It seems
possible that the temperature required would run the risk of igniting the
propellant; potentially requiring further insulation between the propellant
and the wall; there may also not be sufficient time to reach equilibrium
given maximum burns of 1-2 minutes.
Bill
On Friday, November 4, 2016, John Lyngdal <john.lyngdal@xxxxxxxxx> wrote:
Looking at alternate materials for a long burn motor design that have
lower thermal conductivity and heat capacity as compared to graphite. Right
now I'm considering machinable ceramics, BN, and perhaps molded alumina.
Any personal experience or publication links would be most welcome.
John
