MATHEMATICAL MODELING OF THE VISCOELASTIC BEHAVIOR OF A CHARGE OF A SOLID PROPELLANT UNDER ACOUSTIC INSTABILITY OF AN INTER CHAMBER PROCESS. COMPUTATIONAL EXPERIMENT
For the first time, a intermodulation effect of the first kind (nonlinear superposition of gas oscillations with a small frequency difference) in the combustion chamber of a SPRM for a special purpose was obtained by direct numerical simulation. The estimation of the influence of the acoustic instability of the intracameric process of a special-purpose rocket engine, taking into account the spatiotemporal localization of the dynamic load, on the vibrodynamic strength of the charge of the TT for its temperature-time viscoelastic dependence of the elastic modulus (Maxwell's relaxation kernel) and rheology is determined for the first time. The developed mathematical apparatus, the complex of applied programs created on its basis, the developed method of calculation, the conducted methodical investigations make it possible to significantly improve reliability, improve the energy mass, strength, operational and other characteristics of the SPRM.