Raptor-class methalox throat wall, steady state, per cm² of liner — estimates from public figures, not SpaceX data
Gas-side convection
R
conv
=
0.283 K/W
q
=
9200 W
Gas radiation
R
rad
=
3.25 K/W
q
=
800 W
GRCop liner, 0.8 mm
R
cond
=
0.0250 K/W
q
=
10000 W
Coolant-side convection
R
conv
=
0.0350 K/W
Carried to the injector
q
regen
=
10000 W
Combustion gas
T
g
=
3500 K
Liner hot face
T
hw
=
900 K
Channel wall
T
cw
=
650 K
Methane coolant
T
c
=
300 K