Snecma

Centre National Detudes Spatiales

Arianegroup Sas

Airbus Safran Launchers Sas

Alain Kernilis

Serge Daniel Le Gonidec

Jeremy Toutin

Nicolas Lemoine

Ludivine Boulet

Olivier Crassous

Jérémy Toutin

A field of vehicles propelled by reaction, and more specifically to a method of suppressing the pogo effect in such a vehicle. A feed system for feeding a reaction engine of the vehicle includes a hydraulic accumulator enabling a selection to be made from among a plurality of predetermined operating levels, each corresponding to a different volume of gas. In the method, if a first reference criterion is not satisfied by the current level, the hydraulic accumulator is ordered to make a transition, preferably to an alternative level selected from among alternative levels for which the first reference criterion is satisfied and for which no hydraulic resonant frequency crosses any current mechanical resonant frequency during the transition.

Method for suppressing the pogo effect

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.

Feed system and a method of suppressing the POGO effect

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Freneuse, France

Alain Kernilis