This paper presents an in-depth analysis on the weak turbulence detonation linear interaction problem. The emphasis is on scaling and resonance issues due to the presence of structural scales that are intrinsic to the post-shock heat release region. Natural frequencies are determined as eigenvalues of the non-forced interaction inviscid problem. Influence of detonation parameters on the set of ...

We investigate hydrodynamic instability of a steady planar detonation wave propagating in a circular tube to three-dimensional linear perturbations, using the normal mode approach. Spinning instability is identified and its relevance to the well-known spin detonation is discussed. The neutral stability curves in the plane of heat release and activation energy exhibit bifurcations from a low-fre...

A parallel algorithm which has sufficient scalability for time accurate solution of a propagating detonation wavefront is developed. The emphasis is placed on reduction of computational time without compromising accuracy. The flow was assumed to be unsteady, inviscid and non-heat-conducting and coupled with finite-rate chemistry. A finite volume formulation was employed to ensure conservation a...

This work studies numerically the generation mechanism of a new type unburnt gas pocket and its effects on characteristics detonation-wave/boundary-layer interaction in supersonic flows. Results show that this is generated due to local re-ignition preheated behind separated oblique shocks, unlike traditional pockets longitudinal instability detonation front. The chemical energy released by area...

The strong degeneracy of the C ignition layer on an accreting neutron star results in a hydrodynamic thermonuclear runaway, in which the nuclear heating time becomes shorter than the local dynamical time. We model the resulting combustion wave during these superbursts as an upward propagating detonation. We solve the reactive fluid flow and show that the detonation propagates through the deepes...

We study a Type Ia supernova explosion using large-scale three-dimensional numerical simulations based on reactive fluid dynamics with a simplified mechanism for nuclear reactions and energy release. The initial deflagration stage of the explosion involves a subsonic turbulent thermonuclear flame propagating in the gravitational field of an expanding white dwarf. The deflagration produces an in...

This study will describe multi-dimensional detonation wave solutions of the compressible reactive Navier-Stokes equations. As discussed in detail by Fickett and Davis [1], a steady onedimensional detonation with a spatially resolved reaction zone structure is known as ZND wave, named after Zeldovich, von Neumann, and Döring. In experiments [2] and calculations with simplified models [3], [4], [...

Shaped-charge penetration of explosives is studied analytically and experimentally. Two models are developed, each applicable to a different regime of jet velocity. The first addresses high-velocity penetration. If a jet is sufficiently fast, its penetration velocity will exceed the explosive's detonation velocity, and the process may achieve a steady state with the crater following the detonat...

A considerable amount of energy is released in the form of shock wave from explosive charge detonation. Shock wave energy is responsible for the creation of crushing and fracture zone around the blast hole. The rest of the shock wave energy is transferred to rock mass as ground vibration. Ground vibration is conveyed to the adjacent structures by body and surface waves. Geological structures li...

Pulsed detonation engines have the potential to provide thrust over a wide operating range for a fraction of the cost of conventional turbine engines. These promised returns have given rise to several vigorous research programs in academia, industry, and government labs. To capture the ultra-fast events comprising a detonation wave, researchers are forced to use megahertz range data acquisition...