Abstract: The present invention relates to a deployable diverging bell (2) for a thruster, the bell comprising: a stationary first diverging bell portion (3) suitable for being connected to a stationary support of the thruster (1); a movable second diverging bell portion (4) that is movable between a retracted position and a deployed position in which it is connected to the downstream end of the first diverging bell portion (3) in order to extend it (3); and at least one deployment mechanism (6, 8) including means (6) for moving the movable second diverging bell portion (4) relative to the stationary first diverging bell portion (3) in order to deploy the movable second diverging bell portion (4) from its retracted position to its deployed position; the bell being characterized in that it includes at least one damper means (13) for damping vibration coming from the movable second diverging bell portion (4) and/or the deployment mechanism (6, 8).

Abstract: An injection element for injecting two propellants into a combustion chamber, and usable for a rocket engine including at least one combustion chamber of type having an injector including one or more such injection elements. The injection element includes a first annular duct for injecting a first propellant and a second annular duct for injecting a second propellant, the second duct being coaxial with and externally adjacent to the first duct, and potentially a third annular duct that is coaxial with and externally adjacent to the second duct. The first duct surrounds a central body of the injection element, the central body including a cavity in communication with an outer surface of the central body and configured to damp at least one predetermined acoustic frequency.

Abstract: The present invention relates to a deployable diverging bell (2) for a thruster, the bell comprising: a stationary first diverging bell portion (3) suitable for being connected to a stationary support of the thruster (1); a movable second diverging bell portion (4) that is movable between a retracted position and a deployed position in which it is connected to the downstream end of the first diverging bell portion (3) in order to extend it (3); and at least one deployment mechanism (6, 8) including means (6) for moving the movable second diverging bell portion (4) relative to the stationary first diverging bell portion (3) in order to deploy the movable second diverging bell portion (4) from its retracted position to its deployed position; the bell being characterized in that it includes at least one damper means (13) for damping vibration coming from the movable second diverging bell portion (4) and/or the deployment mechanism (6, 8).