Gas-phase detonation propagation in mixture composition gradients.
Reads0
Chats0
TLDR
The propagation of detonations through several fuel–air mixtures with spatially varying fuel concentrations is examined numerically, finding that in the high-activation-energy mixture, detonations propagate more slowly as the magnitude of the mixture composition gradient is increased and can be quenched in a large enough gradient.Abstract:
The propagation of detonations through several fuelair mixtures with spatially varying fuel concentrations is examined numerically. The detonations propagate through two-dimensional channels, insid...read more
Citations
More filters
Journal ArticleDOI
Numerical Simulation of the Deflagration-to-Detonation Transition in Inhomogeneous Mixtures
TL;DR: In this paper, the hazardous potential of flammable hydrogen-air mixtures with vertical concentration gradients is investigated numerically, based on the formulation of a reaction progress variable and accounts for both deflagrative flame propagation and autoignition.
Journal ArticleDOI
Detonation propagation in hydrogen-air mixtures with transverse concentration gradients
TL;DR: In this paper, the influence of transverse concentration gradients on detonation propagation was investigated experimentally in a wide parameter range, and significant amounts of mixture seem to be consumed by turbulent deflagration behind the leading detonation.
Journal ArticleDOI
Understanding explosions – From catastrophic accidents to creation of the universe
TL;DR: In this article, the authors focus on two extremes of explosions: the general class of Type Ia supernova (SNIa), which are surprisingly uniform thermonuclear explosions of white dwarf stars, and a specific gasoline vapor-cloud explosion that occurred at the Buncefield fuel depot in 2005.
Journal ArticleDOI
Role of inlet reactant mixedness on the thermodynamic performance of a rotating detonation engine
TL;DR: In this article, a two-dimensional Euler simulation is modified to include mixing factors to simulate the imperfect mixing of injected reactant streams, and it is shown that mixing has a minimal impact on performance.
Journal ArticleDOI
Numerical simulation of dilute and dense layered coal-dust explosions
Ryan W. Houim,Elaine S. Oran +1 more
TL;DR: In this article, multidimensional time-dependent simulations were performed to study the interaction of a shock wave and resulting shear layer with layers of coal dust, and the final result is a coupled complex consisting of a coal-dust flame.
References
More filters
Computer Program for Calculation of Complex Chemical Equilibrium Compositions and Applications II. Users Manual and Program Description. 2; Users Manual and Program Description
Bonnie J. McBride,Sanford Gordon +1 more
Computer Program for Calculation of Complex Chemical Equilibrium Compositions, Rocket Performance, Incident and Reflected Shocks, and Chapman-Jouguet Detonations
Sanford Gordon,Bonnie J. McBride +1 more
TL;DR: Computer program is described for numerical solution of chemical equilibria in complex systems by using nonlinear algebraic equations using free-energy minimization technique.
Book
The detonation phenomenon
TL;DR: In this article, the authors introduce the detonation phenomenon in explosives and provide a review of the outstanding problems and future directions in detonation research, as well as discuss the important effects of confinement and boundary conditions on the propagation of a detonation wave.
Journal ArticleDOI
Effects of heat release on triple flames
TL;DR: In this article, the effects of heat release and mixture fraction gradients on flame propagation in partially premixed flows are studied. But the effects are not independent, however; heat release modifies the effective mixture fraction gradient in front of the flame.
Journal ArticleDOI
Fully Threaded Tree Algorithms for Adaptive Refinement Fluid Dynamics Simulations
TL;DR: In this article, a fully threaded tree (FTT) for adaptive mesh refinement (AMR) of regular meshes is described, which uses a tree threaded at all levels, so that tree traversals for finding nearest neighbors are avoided.
Related Papers (5)
Behavior of detonation propagation in mixtures with concentration gradients
Kazuhiro Ishii,M. Kojima +1 more