The invention discloses a liquid-film cooled
thrust chamber for a rail posture control engine. A first
propellant chamber is arranged on the outer side of the head of the
thrust chamber, and a secondpropellant chamber is arranged on the outer side of the middle position of the body of the
thrust chamber. A plurality of first spray holes communicating with the first
propellant chamber are formed in the shell wall of the head of the thrust chamber. A plurality of
combustion jet holes and a plurality of liquid film jet holes are evenly formed in the shell wall of the body of the thrust chamber in the circumferential direction. A second
propellant is sprayed to the head and the
throat of the thrust chamber through the
combustion jet holes and the multiple liquid film jet holes respectively, aliquid film is sprayed towards the
throat of the thrust chamber, and a tangential liquid
feeding mode is adopted, so that loss of the liquid film can be reduced. The cooling performance of the liquidfilm is given full play to. In addition, the
combustion jet holes face the head of the thrust chamber, a tangential liquid
feeding mode is adopted, the cooling performance of the liquid film can be achieved, meanwhile, the liquid film can react with the first propellant, therefore the proportion of the liquid film in the propellant can be reduced, and whole-
body cooling of the thrust chamber is achieved.