NON-DESTRUCTIVE METHOD FOR DETERMINING STRENGTH CHARACTERISTICS OF SOLID FUEL ROCKET ENGINE CHARGE AFTER COMPLETION OF LONG-TERM OPERATION STAGE Russian patent published in 2023 - IPC F02K9/96 

FIELD: non-destructive methods; solid propellant rocket engines.

SUBSTANCE: invention relates to a non-destructive method for determining the strength characteristics of a solid propellant rocket engine charge after completion of the long-term operation stage. The method includes manufacturing, simultaneously with a full-scale charge, a satellite charge with a standard heat-protective coating and a protective-fastening layer at the end, conducting an experimental determination of the strength characteristics and density of the satellite charge, determining the calibration coefficient for the dependence of strength characteristics on density, and determining the fuel density in near-hull zone of full-scale charge after completion of the stage of its long-term operation. Then, using a calibration coefficient, the strength characteristics of the full-scale charge in the near-vessel zone are calculated after completion of the long-term operation stage.

EFFECT: invention ensures the achievement of reliable prediction of the strength characteristics of the charge-body system in a full-scale solid propellant rocket engine after completion of the hydroelectric test, while maintaining the increased safety of the proposed method at the prototype level and eliminating emergency situations when assigning and extending the service life of the solid propellant rocket engine.

2 cl, 4 dwg