METHOD OF CONTROL OF MODE OF OPERATION OF LIQUID-PROPELLANT ROCKET ENGINE PLANT Russian patent published in 2002 - IPC

FIELD: rocketry. SUBSTANCE: proposed method consists in expulsion of propellant from tank by pressurization gas, measurement of pressure over route of supply of propellant to engine and change of passage cross section of control member. Besides that, frequency and amplitude of self-excited oscillation at engine inlet are analyzed additionally and in case of increased amplitude of oscillations, passage cross section is increased to adjust flow rate of gas used for expulsion of propellant to engine supply line. Increase of pressure at engine inlet causes change in cavitational cavities at pump inlet, thus changing frequency of low-frequency oscillations and enhancing damping of oscillation amplitude and stability of system. In case increase is not discontinued, passage cross section of control unit is changed towards setting the mode of operation ensuring damping of self-excited oscillations. EFFECT: enhanced operational stability of liquid-propellant rocket engine. 1 dwg