Flame acceleration in channels with obstacles in the deflagration-to-detonation transition

  title={Flame acceleration in channels with obstacles in the deflagration-to-detonation transition},
  author={Damir M. Valiev and Vitaly Bychkov and V’yacheslav Akkerman and Chung K. Law and Lars E Eriksson},
  journal={Combustion and Flame},


Study of flame acceleration and deflagration-to-detonation transition (DDT) in obstructed channels is an important subject of research for hydrogen safety. Experiments and numerical simulations of

Flames in channels with cold walls: acceleration versus extinction : acceleration versus extinction

The present work considers the problem of premixed flame front acceleration in microchannelswith smooth cold non-slip walls in the context of the deflagration-to-detonationtransition; the flame

The role of spontaneous waves in the deflagration-to-detonation transition in submillimetre channels

Flame acceleration and transition to detonation in submillimetre two-dimensional planar and three-dimensional square channels were simulated by solving the compressible reactive Navier–Stokes

Deflagration-to-Detonation Transition in Gas-Particle Mixtures

Effect of presence of inert particles on the process of deflagration to detonation transition (DDT) in stoichiometric H2 Air mixture in channels with obstacles has been simulated and studied. The

Flame acceleration and deflagration-to-detonation transition in narrow channels with thin obstacles

The entire process of deflagration-to-detonation transition (DDT) in narrow channels with thin obstacle configurations is studied through high-resolution simulations. The results show that the

Direct Numerical Simulation of Flame Propagation and Deflagration to Detonation Transition in Confined Space with Different Perforated Plate Positions

ABSTRACT Flame acceleration and the deflagration to detonation transition (DDT) are important physical phenomena in combustion theories. The main objective of this work is to provide a comprehensive

Moderation of flame acceleration in obstructed cylindrical pipes due to gas compression

The role of gas compression in the process of extremely fast flame acceleration in obstructed cylindrical tubes is studied analytically and validated by computational simulations. This acceleration

Gas Compression Moderates Flame Acceleration in Deflagration-to-Detonation Transition

The effect of gas compression at the developed stages of flame acceleration in smooth-wall and obstructed channels is studied. We demonstrate analytically that gas compression moderates the

Quasi-steady stages in the process of premixed flame acceleration in narrow channels

The present paper addresses the phenomenon of spontaneous acceleration of a pre-mixed flame front propagating in micro-channels, with subsequent deflagration-to-detonation transition. It has recently



Different stages of flame acceleration from slow burning to Chapman-Jouguet deflagration.

It is shown that flame acceleration undergoes three distinctive stages: initial exponential acceleration in the quasi-isobaric regime, almost linear increase in the flame speed to supersonic values, and saturation to a stationary high-speed deflagration velocity.

Theory and modeling of accelerating flames in tubes.

The analytical theory of premixed laminar flames accelerating in tubes is developed, which is an important part of the fundamental problem of flame transition to detonation. According to the theory,

Physical mechanism of ultrafast flame acceleration.

It is demonstrated that delayed burning between the obstacles creates a powerful jetflow, driving the acceleration, which is much stronger than the classical Shelkin scenario of flame acceleration due to nonslip at the channel walls.

Chapman-Jouguet deflagrations

Two types of quasi-steady high-speed deflagration have been observed experimentally. In the first place they are reaction-waves created in, and propagating through, rough tubes and tubes that contain