Geodesic
Non-stationary behavior of a solid propellant charge for nozzleless solid rocket motors under gas-dynamic load
Vestnik Tomskogo gosudarstvennogo universiteta. Matematika i mehanika, no. 72 (2021), pp. 48-59 Cet article a éte moissonné depuis la source Math-Net.Ru

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The numerical solution to a conjugate problem of an unsteady flow of combustion products in a flow path of the nozzleless solid rocket motor (SRM) and the oscillation of a solid propellant charge under the action of the forces directed from combustion products is considered. The Navier-Stokes equations for a compressible viscous gas are used to mathematically describe the flow of the combustion products. To model the charge oscillations, the equations of solid mechanics are applied, which take into account the propellant hyperelasticity. Pressure distributions and the propellant burning rate along the charge channel are presented for different models of the propellant burning rate. It is revealed that at the stage of SRM design, the use of the burning rate law, determined by pressure in the head of the combustion chamber, is more preferable in order to assess the internal ballistic characteristics. The solution to the conjugate problem shows that in the nozzleless SRM with the propellant having low Young's modulus, resonance can occur, which causes uncontrolled charge oscillations.
Keywords: nozzleless solid rocket motor, hyperelasticity, conjugate problem, resonance.
Mots-clés : charge oscillation 
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     author = {I. G. Voropaeva and A. A. Kozulin and L. L. Min'kov and E. R. Shrager},
     title = {Non-stationary behavior of a solid propellant charge for nozzleless solid rocket motors under gas-dynamic load},
     journal = {Vestnik Tomskogo gosudarstvennogo universiteta. Matematika i mehanika},
     pages = {48--59},
     year = {2021},
     number = {72},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VTGU_2021_72_a3/}
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I. G. Voropaeva; A. A. Kozulin; L. L. Min'kov; E. R. Shrager. Non-stationary behavior of a solid propellant charge for nozzleless solid rocket motors under gas-dynamic load. Vestnik Tomskogo gosudarstvennogo universiteta. Matematika i mehanika, no. 72 (2021), pp. 48-59. http://geodesic.mathdoc.fr/item/VTGU_2021_72_a3/

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