PIN NOZZLE PROPULSION SYSTEM Russian patent published in 2023 - IPC F02K9/97 

FIELD: engine building.

SUBSTANCE: invention can be used in the creation (modernization) of the propulsion system (PS) of the 1st stage comprising liquid-propellant rocket engines around the perimeter. 1st stage PS of the launch vehicle (LV) consists of two or more liquid-propellant rocket engines, each of which is equipped with a combustion chamber. In this case, liquid rocket engines are installed along the perimeter and parallel to the axis of the high-altitude nozzle, made in the form of a truncated cone. According to the invention, the LV 1st stage propulsion system is equipped with a pin nozzle with a round central body made in the form of a truncated cone. A torus chamber is installed along the perimeter of the base of the round central body, and a narrow annular slot is made between the shell of the torus chamber and the round central body. At the same time, the combustion chambers of all liquid-propellant rocket engines located along the perimeter of the LV 1st stage PS are docked coaxially with it to the torus chamber of the pin nozzle. Inside the round central body of the pin nozzle, made in the form of a truncated cone, an engine with a combustion chamber and a Laval nozzle can be additionally installed coaxially with it. In this case, the outlet section of the round Laval nozzle is installed flush with the end face of the truncated cone.

EFFECT: increased efficiency of the LV 1st stage PS, in which the engines are located along its perimeter.

2 cl, 4 dwg