combustion chamber mathematical modeling математичне моделювання рідинний ракетний двигун стійкість робочого процесу твердопаливна енергетична установка : liquid-propellant rocket engine agglomeration and combustion of metal propellant additives and thrust spread cavitation oscillations combustion chamber acoustics dynamic interaction of acoustic oscillations and structural vibrations external and internal factors liquid jet system liquid rocket engine and feed system liquid-propellant launch vehicle pogo oscillations liquid-propellant rocket engine low-frequency dynamic processes multi-engine liquid-propellant rocket launch vehicle operating process stability pneumatic vibration protection system solid-propellant propulsion system solid-propellant rocket engine start start and shutdown the engine the upper stage of the launch vehicle transient processes vortex formation in combustion product flow well drilling working process stability