Feed system and a method of suppressing the POGO effect

摘要

A rocket engine feed system, includes a feed circuit including a device for varying a gas volume in the feed circuit to suppress the POGO effect. A method of suppressing the POGO effect varies at least one hydraulic resonant frequency by varying a rate at which gas is injected into the feed circuit.

主权项

1. A feed system for feeding a rocket engine with a liquid propellant, the system comprising:
a feed circuit; and a device to vary a volume of gas in the feed circuit, which device is configured to cause a volume of gas in the feed circuit to vary while the rocket engine is in operation, wherein the device to vary the volume of gas comprises a hydraulic accumulator with a variable liquid level, the hydraulic accumulator including a plurality of dip tubes, each including a respective valve and connecting a duct of the feed circuit to a respective distinct liquid level, wherein each dip tube extends to a surface of the liquid at their respective distinct liquid level.