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International Journal of Energetic Materials and Chemical Propulsion
ESCI SJR: 0.28 SNIP: 0.421 CiteScore™: 0.9

ISSN Imprimer: 2150-766X
ISSN En ligne: 2150-7678

International Journal of Energetic Materials and Chemical Propulsion

DOI: 10.1615/IntJEnergeticMaterialsChemProp.v7.i6.40
pages 507-522

MULTI-DIMENSIONAL SIMULATION ON IGNITION STAGE OF GRANULAR SOLID PROPELLANT VARYING PRIMER CONFIGURATION

Hiroaki Miura
Keio University 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, 223-8522 JAPAN
Akiko Matsuo
Keio University 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, 223-8522 JAPAN
Yuichi Nakamura
NOF Corporation 61-1 Kitakomatsudai, Taketoyo-cho, Chita-gun, AICHI, 470-2398 JAPAN

RÉSUMÉ

The effects of primer configuration in the propellant chamber of the gun system utilizing granular solid propellant on the ignition performance (such as the formation of differential pressure between the breech pressure and the projectile base pressure) are numerically investigated. Simulations of experiments varying the primer length, the total area of flash holes and the igniter mass are carried out using the solid/gas two-phase fluid dynamics code for two-dimensional axisymmetric calculation of Eulerian gas flow and discrete solid propellant particles. The code simulates the igniter combustion in the primer, the movement of burning solid propellant grains, and the formation of pressure gradients in the chamber in the ignition process. The negative differential pressures between the breech and the rupture disk measured in the experiment are well predicted by the simulations for various primer conditions. In the process of igniting the solid propellant, the propellant grains are accelerated toward the rupture disk by the igniter gas flows from the primer and pressure gradients. From the simulated results, it is shown that the differential pressure is caused by the movement of solid propellant grains in the chamber depending on the primer conditions.

RÉFÉRENCES

  1. Nusca, M.J. and Conroy, P.J., Multiphase CFD Simulations of Solid Propellant Combustion in Gun Systems.

  2. Conroy, P.J. and Kooker, D.E., Implications of Gun Propellant Bed Rheology.

  3. Shima, E. and Jounouchi, T., Role of Computational Fluid Dynamics in Aeronautical Engineering (No. 12), Formulation and Verification of Uni-Particle Upwind Schemes for the Euler Equations.

  4. Advisor Group for Aerospace Research and Development, Fluid Dynamics Aspects of Internal Ballistics,AGARD Advisory Report No. 172.

  5. Nakamura, Y., Ishida, T., Miura H., and Matsuo A., Negative Differential Pressure by Ignition of Granular Solid Propellant.


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