Numerical investigation of the mechanism behind the deflagration to detonation transition in homogeneous and inhomogeneous mixtures of H2-air in an obstructed …

MHS Saeid, J Khadem, S Emami - International Journal of Hydrogen …, 2021 - Elsevier
The accidental release of hydrogen into enclosures can result in a flammable mixture with
concentration gradients and possible deflagration-to-detonation transition (DDT). This …

[HTML][HTML] Recent advances in combustion science related to hydrogen safety

JX Wen, ES Hecht, R Mevel - Progress in Energy and Combustion Science, 2025 - Elsevier
Hydrogen is a key pillar in the global Net Zero strategy. Rapid scaling up of hydrogen
production, transport, distribution and utilization is expected. This entails that hydrogen …

Detonation propagation in hydrogen–air mixtures with transverse concentration gradients

LR Boeck, FM Berger, J Hasslberger, T Sattelmayer - Shock Waves, 2016 - Springer
The influence of transverse concentration gradients on detonation propagation in H _2 H 2–
air mixtures is investigated experimentally in a wide parameter range. Detonation fronts are …

Effect of diffusion time on the mechanism of deflagration to detonation transition in an inhomogeneous mixture of hydrogen-air

MHS Saeid, J Khadem, S Emami, M Ghodrat - International Journal of …, 2022 - Elsevier
This study aimed to numerically investigate the effect of diffusion time between H 2 injection
and ignition on mechanisms behind deflagration to detonation transition (DDT) in an …

Flame acceleration and transition to detonation in non-uniform hydrogen-air mixtures in an obstructed channel with different obstacle arrangements

J Fan, H Xiao - Fire Safety Journal, 2022 - Elsevier
Numerical simulations were performed to study flame acceleration (FA) and deflagration-to-
detonation transition (DDT) in non-uniform hydrogen-air mixtures in an obstructed channel …

The effect of concentration gradients on deflagration-to-detonation transition in a rectangular channel with and without obstructions–A numerical study

RK Azadboni, A Heidari, LR Boeck, JX Wen - International Journal of …, 2019 - Elsevier
Explosions in homogeneous reactive mixtures have been widely studied both
experimentally and numerically. However, in accident scenarios, mixtures are usually …

Detonations in hydrogen-methane-air mixtures in semi confined flat channels

W Rudy, M Zbikowski, A Teodorczyk - Energy, 2016 - Elsevier
The aim of this work was to determine the influence of methane addition on the critical layer
thickness h* and its relation to detonation cell size (λ) for stable detonation propagating in …

Prediction of confined flame flashback limits using boundary layer separation theory

V Hoferichter, C Hirsch… - … of Engineering for …, 2017 - asmedigitalcollection.asme.org
Premixed combustion is a common technology applied in modern gas turbine combustors to
minimize nitrogen oxide emissions. However, early mixing of fuel and oxidizer opens up the …

Numerical studies of flame acceleration and onset of detonation in homogenous and inhomogeneous mixture

RK Azadboni, A Heidari, JX Wen - Journal of Loss Prevention in the …, 2020 - Elsevier
Abstracts Numerical investigations have been conducted for flame acceleration and
transition to detonation in a horizontal obstructed channel with 60 percent blockage ratio …

The gravent ddt database

LR Boeck, P Katzy, J Hasslberger, A Kink… - Shock Waves, 2016 - Springer
An open-access online platform containing data from experiments on deflagration-to-
detonation transition conducted at the Institute of Thermodynamics, Technical University of …