Progress in combustion investigations of hydrogen enriched hydrocarbons

Shock tube study on ignition delay of hydrogen and evaluation of various kinetic models

“…Among various alternative fuels, hydrogen is regarded as a promising alternative fuel in transportation, heating, and power plants in the future due to some favorable combustion characteristics [1,2]. The main property of hydrogen relevant to its engine compatibility is its high flame speed, resulting in broad burn limit and can increasing the fraction of exhaust gas recirculation.…”

Effect of pressure and equivalence ratio on the ignition characteristics of dimethyl ether-hydrogen mixtures

“…Hydrogen and/or syngas (primarily a mixture of hydrogen and carbon monoxide) are expected as the nextgeneration fuels for engines and power sources because of their greatest potential benefits to energy supply and the environment [6]. Hydrogen is the most abundant element in the earth and thus offers a virtually limitless supply that can be mass produced either from renewable materials (biomass, agricultural products and waste) or from fossil fuels (coal and natural gas) [7,8].…”

Structure of turbulent rich hydrogen-air premixed flames

“…8 To laminar premixed flames, cellularity is believed related to Darrieus-Landau instability (hydrodynamic issue), Lewis-von Elbe instability (thermal-diffusive issue), and Rayleigh-Taylor instability (density gradient-related issue). From the reports about previous studies on laminar hydrogen-contained premixed flames, 6,[9][10][11][12][13][14][15] it could be known that hydrogen-air premixed flames were more obviously cellular than the others with same initial conditions; adding hydrogen into other fuels could induce fiercer cellularity than their intrinsic, and such results were mainly attributed to the instabilities of hydrogenair premixed flame. However, the cellularity had not been especially discussed on turbulent premixed flames albeit some flame images with cellularity could be found in the literature about displacement speeds of turbulent premixed flames with hydrogen contained.…”