The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 28, 2006
Filed:
Aug. 27, 2003
Philippe Le Helley, Pessac, FR;
Louis Jacques, Saint Medard en Jalles, FR;
Christophe Magniére, Merignac, FR;
Gilles Uhrig, Pyla sur Mer, FR;
Bernard Bondon, Merignac, FR;
Jean-claude Tricot, Martignas, FR;
Didier Boury, Saint Medard en Jalles, FR;
Marco Telara, Artena, IT;
Paolo Bellomi, Rome, IT;
Georgio Mastrangelo, Rome, IT;
Philippe Le Helley, Pessac, FR;
Louis Jacques, Saint Medard en Jalles, FR;
Christophe Magniére, Merignac, FR;
Gilles Uhrig, Pyla sur Mer, FR;
Bernard Bondon, Merignac, FR;
Jean-Claude Tricot, Martignas, FR;
Didier Boury, Saint Medard en Jalles, FR;
Marco Telara, Artena, IT;
Paolo Bellomi, Rome, IT;
Georgio Mastrangelo, Rome, IT;
Snecma Propulsion Solide, Le Haillan, FR;
AVIO S.p.A., Turin, IT;
Abstract
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.