Arianegroup Sas

Snecma Propulsion Solide

Avio Corporation

Didier Boury

Jacques Rey

Paolo Bellomi

Bernard Bondon

Philippe Le Helley

Marco Telara

Gilles Uhrig

Agnès Aymonier

Jean-Claude Tricot

Louis Jacques

Georgio Mastrangelo

Romain Bernard

Christophe Magniére

The terminal portion of a prefabricated skirt is connected to a casing of a thruster body in the vicinity of an end wall thereof using a method including positioning the terminal portion of the skirt with circumferential clearance around the casing of the thruster body in the vicinity of the end wall; keeping the skirt in position relative to the casing of the thruster body; closing both ends of an annular space between the terminal portion of the skirt and the casing of the thruster body; injecting elastomer into the annular space; and curing the elastomer.

Method of connecting a skirt to a thruster body casing

The invention provides a system for passively controlling pressure oscillations of hydrodynamic origin in a solid propellant thruster comprising a body containing a charge of solid propellant, the system comprising at least one insert disposed in the thruster body transversely relative to the flow direction of the combustion gases of the solid propellant. The insert has an opening of non-axisymmetric shape so as to generate a three-dimensional effect on the flow and prevent axisymmetric turbulent modes from forming in the thruster. Thus, the control system of the invention serves to break the symmetry of the flow and thus prevents axisymmetric turbulence forming which is the source of instability that the present invention seeks to control. The present system is applicable to existing thrusters.

System and method of controlling pressure oscillations of hydrodynamic origin for a solid propellant thruster

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Saint Medard en Jalles, France

Didier Boury