In this study, the impact of hydrogen concentration on deflagration to detonation transition (DDT) and diffraction mechanisms was investigated. The combustion chamber an ENACCEF facility, with nine obstacles at a blockage ratio 0.63 three mixtures concentrations 13%, 20%, 30%. Detonation were numerically investigated by density-based solver OpenFOAM CFD toolbox named ddtFoam. simulation, for lo...

Although the ignition-and-growth model can simulate ignition and detonation behavior of traditional energy materials well, it seems insufficient to impact-induced deflagration reactive (RMs) using current finite element codes due their more complicated threshold lower reaction rates. Therefore, a simulation method for projectile (RMP) is developed by introducing tunable conditions RMs, user-def...

Non-equilibrium plasma demonstrates great potential to control ultra-lean, ultra-fast, low-temperature flames and to become an extremely promising technology for a wide range of applications, including aviation gas turbine engines, piston engines, RAMjets, SCRAMjets and detonation initiation for pulsed detonation engines. The analysis of discharge processes shows that the discharge energy can b...

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prepared for the IMA Workshop on High-Speed Combustion in Gaseous and Condensed Phase Energetic Materials, Minneapolis, November 8–12, 1999

ABSTRACT We study the effect of different Type Ia SN nucleosynthesis prescriptions on Milky Way chemical evolution. To this aim, we run detailed one-infall and two-infall evolution models, adopting a large compilation yield sets corresponding to white dwarf progenitors (near-Chandrasekar sub-Chandrasekar) taken from literature. adopt fixed delay time distribution function for SNe, in order avoi...

Abstract Recent observations have shown a remarkable diversity of observational behaviors and explosion mechanisms in thermonuclear supernovae (SNe). An emerging class peculiar SNe, called Type Iax, show photometric spectroscopic distinct from normal Ia. Their origin remains highly controversial, but pure turbulent deflagration white dwarfs (WDs) has been regarded as the leading formation theor...

Abstract The medium-thickness plate penetration enhanced behavior of coupled kinetic energy and chemical reactive fragment was investigated. A series experiments were conducted. After the experiments, High-speed photography images blackening at front compared. results show that enhancement penetrating is related to intensity deflagration plate. Division zones impacting proposed, combine dynamic...