The influence of thermostatting temperature on the ignition and deformation dynamics of a cylindrical charge in a nozzleless propulsion device
Authors
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Leonid Leonidovich Minkov
Doctor of Phys. - Math. Sciences, Professor, Mathematical Physics Department, Physics Engineering Faculty, Tomsk State University, Tomsk, Russian Federation
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Nataliya Radikovna Gimayeva
Post graduate student, Physics Engineering Faculty, National Research Tomsk State University, Tomsk, Russian Federation
DOI:
https://doi.org/10.31489/2026N3/64-73Keywords:
nozzle less propulsion device, viscoelastic charge, ignition of the charge, coupled simulationAbstract
This article presents the results of numerical simulation of the steady-state operation of a nozzle less propulsion device (NPD) with a cylindrical viscoelastic solid propellant charge. The study was performed in a two-dimensional axisymmetric formulation, taking into account the coupled interaction of viscous compressible combustion products and a deformable charge. The viscoelastic behavior of the propellant is described using Prony series and the Williams-Landel-Ferry temperature-time shift function. It was found that an increase in the initial thermostatting temperature of the charge reduces its ignition time and decreases the initial shear modulus, which leads to a more than twofold increase in surface movement. It is shown that low initial temperatures lead to a decrease in propellant chamber pressure, while an increase in temperature by 115 °C increases the maximum pressure by 25 atm. The convergence of the numerical solution on three computational grids is assessed.
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