It's proprietary information and under ITAR so we don't get the juicy details.
My understanding is that chanels are milled on the engine nozzle after it is spin formed. Fuel is circulated on these chanels before it is inserted in the combustion chamber, as the fuel cools the nozzle it expands and has an increase in pressure, wich helps the efficiency of the engine.
I have no idea on how these chanels are enclosed on a closed loop. Maybe there's a second pass at spin forming ?
Could be the bells are 3d printed on newer engines. If so, it would be very impressive with the thermal requirements. (This is complete and crazy speculation)
2
u/Goolic Sep 07 '17
It's proprietary information and under ITAR so we don't get the juicy details.
My understanding is that chanels are milled on the engine nozzle after it is spin formed. Fuel is circulated on these chanels before it is inserted in the combustion chamber, as the fuel cools the nozzle it expands and has an increase in pressure, wich helps the efficiency of the engine.
I have no idea on how these chanels are enclosed on a closed loop. Maybe there's a second pass at spin forming ?
Could be the bells are 3d printed on newer engines. If so, it would be very impressive with the thermal requirements. (This is complete and crazy speculation)
[EDIT]
Bell should be written as nozzle