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International Journal of Energetic Materials and Chemical Propulsion

ISSN Print: 2150-766X
ISSN Online: 2150-7678

International Journal of Energetic Materials and Chemical Propulsion

DOI: 10.1615/IntJEnergeticMaterialsChemProp.v8.i6.50
pages 531-539

NUMERICAL SIMULATION OF SINGLE SPINNING AND TWO-HEADED DETONATION IN A CIRCULAR TUBE

Nobuyuki Tsuboi
Department of Mechanical and Control Engineering, Kyushu Institute of Technology
Yu Daimon
University of Illinois at Urbana-Champaign, 1304 West Spring field Avenue, Urbana, IL 61801-2987 USA
A. Koichi Hayashi
Department of Mechanical Engineering, Aoyama Gakuin University, Kanagawa, Japan

ABSTRACT

Unsteady three-dimensional detonations in both a circular tube and a coaxial tube are simulated in order to reveal characteristics of single spinning and two-headed detonations. The numerical results show a feature of a single spinning detonation which was discovered in 1926. Transverse detonations are observed in both tubes. However, the single spinning mode maintains the complicated Mach reflection, whereas the two-headed mode develops periodically from the single Mach reflection to the complex one. The instantaneous detonation velocities for the spinning mode change from 0.9−1.1 DCJ along the symmetry of axis, and those for the two-headed mode change from 0.8minus;1.4 DCJ along the inner tube wall. Those along the outer tube for both modes vary from 0.75 DCJ to 1.6 DCJ