Combustion chamber casing of a liquid-fuel rocket engine

摘要

The casing comprises a combustion chamber and a nozzle, consisting of a subsonic and a supersonic sections with an external structural envelope and a fire wall having a ribbed external surface. The regenerative cooling passage is formed between the envelope and the fire wall. The fire wall is made from copper or a copper alloy, and the external structural envelope is made from steel or a nickel alloy. The fire wall has a metal coating stratified in the region of the nozzle throat over a length of not less than 0.3 diameter of the nozzle throat in the longitudinal direction. The first layer of the coating is nickel 50 mum to 1000 mum thick, and the second layer is chromium 10 mum to 500 mum thick.