Load changing characteristics of the hydrogen‐air and hydrogen‐oxygen proton exchange membrane fuel cells
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DOI: 10.1002/er.7306
Abstract: Load changing performance is significant for the application of proton exchange membrane fuel cells (PEMFCs). This paper compares experimental results of the hydrogen‐air and hydrogen‐oxygen PEMFC and analyzes their dynamic performance under various operating conditions.… read more here.
Keywords: load changing; membrane; hydrogen; hydrogen air ... See more keywords
The effect of ignition location on explosion venting of hydrogen–air mixtures
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DOI: 10.1007/s00193-017-0712-1
Abstract: The effect of ignition location and vent burst pressure on the internal pressure-time history and external flame propagation was investigated for vented explosions of hydrogen–air mixtures in a small cylindrical vessel. A high-speed camera was… read more here.
Keywords: effect ignition; ignition; ignition location; hydrogen air ... See more keywords
CFD study on stability limits of hydrogen/air premixed flames in planar micro-combustors with catalytic walls
Sign Up to like & getrecommendations! Published in 2017 at "Applied Thermal Engineering"
DOI: 10.1016/j.applthermaleng.2017.04.054
Abstract: Abstract Micro-combustion encounters both thermal and radical quenching, resulting in poor flame stability. Catalytic reactions offer a potential solution to counter radical quenching. A numerical study on the flame stability limits of hydrogen/air premixed combustion… read more here.
Keywords: stability limits; study; limits hydrogen; hydrogen air ... See more keywords
Formation of ultra-lean comet-like flame in swirling hydrogen–air flow
Sign Up to like & getrecommendations! Published in 2018 at "Combustion and Flame"
DOI: 10.1016/j.combustflame.2018.06.019
Abstract: Abstract In this study, a hydrogen–air premixed flame in a partially tapered swirl burner in which a stable counterflow of unburned and burned gases is expected to be formed, was investigated. The experimental results indicate… read more here.
Keywords: ultra lean; flame; comet like; formation ... See more keywords
Influence of kinetics on DDT simulations
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DOI: 10.1016/j.combustflame.2018.11.009
Abstract: Abstract Deflagration to Detonation Transition (DDT) is an intricate problem that has been tackled numerically, until recently, using single-step chemical schemes. These studies (summarized in Oran and Gamezo, 2007) [1] showed that DDT is triggered… read more here.
Keywords: single step; ddt; hydrogen air; step ... See more keywords
Effects of stretch-chemistry interaction on chemical pathways for strained and curved hydrogen/air premixed flames
Sign Up to like & getrecommendations! Published in 2021 at "Combustion and Flame"
DOI: 10.1016/j.combustflame.2021.111532
Abstract: Abstract In most combustion scenarios, stretch-chemistry interaction can directly alter the flame structure and combustion properties of a flammable mixture. In this study, the effects of stretch-chemistry interaction on chemical pathways of hydrogen oxidation are… read more here.
Keywords: chemical pathways; hydrogen air; stretch; chemistry ... See more keywords
Effects of ignition location, obstacles, and vent location on the vented hydrogen-air deflagrations with low vent burst pressure in a 20-foot container
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DOI: 10.1016/j.fuel.2020.118677
Abstract: Abstract A series of experiments on vented lean hydrogen-air deflagrations with low vent burst pressure was performed in a 20-foot container. The effects of hydrogen concentration, ignition position, vent location, and obstacles were studied, and… read more here.
Keywords: location; hydrogen; ignition; hydrogen air ... See more keywords
Interaction between heterogeneous and homogeneous reaction of premixed hydrogen–air mixture in a planar catalytic micro-combustor
Sign Up to like & getrecommendations! Published in 2017 at "International Journal of Hydrogen Energy"
DOI: 10.1016/j.ijhydene.2016.12.039
Abstract: Abstract Hetero-/homogeneous combustion of hydrogen–air mixture in a platinum-coated micro channel was studied by means of three-dimensional (3D) Computational Fluid Dynamics (CFD) model using detailed reaction mechanisms for homogeneous (gas phase) and heterogeneous (catalytic) reactions.… read more here.
Keywords: homogeneous reaction; heterogeneous reaction; air mixture; reaction ... See more keywords
A numerical study on combustion and emission characteristics of premixed hydrogen air flames
Sign Up to like & getrecommendations! Published in 2017 at "International Journal of Hydrogen Energy"
DOI: 10.1016/j.ijhydene.2017.07.017
Abstract: Abstract Main challenges for micro power generators that utilize combustion process for energy production are inadequate residence time, destructive radical wall interactions and intensified heat loss which are mainly rooted from size limitation of such… read more here.
Keywords: hydrogen air; combustion; equivalence ratio; hydrogen ... See more keywords
Comparative analysis of hydrogen/air combustion CFD-modeling for 3D and 2D computational domain of micro-cylindrical combustor
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DOI: 10.1016/j.ijhydene.2017.10.070
Abstract: Abstract A computational study of a micro-cylindrical premixed hydrogen-air combustor using RANS is presented. The influence of the geometric dimensionality of the computational domain is studied by performing numerical simulations with 2D planar, 2D axisymmetric… read more here.
Keywords: hydrogen; combustion; combustor; model ... See more keywords
Study of the catalytic combustion of lean hydrogen-air mixtures in a monolith reactor
Sign Up to like & getrecommendations! Published in 2018 at "International Journal of Hydrogen Energy"
DOI: 10.1016/j.ijhydene.2018.07.126
Abstract: Abstract This paper presents an experimental study of catalytic hydrogen combustion that used commercial catalysts containing Pt in a honeycomb monolith reactor in a plug flow configuration. The emphasis is on determining global kinetics in… read more here.
Keywords: monolith reactor; hydrogen air; study catalytic; hydrogen ... See more keywords