Laminar burning velocities of methane-hydrogen-air mixtures

摘要: In a future sustainable society, hydrogen is likely to play an important role as energy carrier. EET-project called Greening of Gas (VG2) the transition path from pure natural gas towards use mixtures containing more and investigated. The research carried out at TU/e focused on safety burner devices. A crucial parameter for devices laminar burning velocity. this thesis velocity methane-hydrogen experimentally determined compared numerical data using several combustion reactionmechanisms. An asymptotic theory stoichiometric methane flames presented. This validated with experimental data. To measure accurately heat flux used, which developed previously TU/e. Based earlier works van Maaren Bosschaart method further analysed in thesis. analysis results better understanding aspects themethod. For example it shown that influence heating jacket negligible when temperature difference least 30 K between unburnt should be maintained. Furthermore, not surface influences experiments presented measurement range. However higher temperatures will used regarded. present research, three sets adiabatic velocities have been measured 95% confidence error intervals. first set consists hydrogen-oxygen-nitrogen various fuel equivalence ratios nitrogen dilutions. second measurements deals methane-hydrogen-air contents up 40%. last show glimpse turbine situations. Here increased from298 420 methane-hydrogen-airmixtures. mixtures, significant differences other authors. discrepancy probably related non-linear stretch correction performed by them. reaction mechanisms performance based case hydrogen-oxygen-nitrogenmixtures. Especially commonly GRI-mechanism deviates Remarkably SKG03 mechanism comparable or even lean slightly rich hydrogen-oxygennitrogen flames. Generally, kinetic perform quite well investigated range; especially Konnov mechanism. When comparing ambient conditions both very well. Experimental methane-air give measurements. Regrettably methanehydrogen- air scarce; Halter et al. results. order get insight basic properties describing flames, Peters Williams adapted stoichiometricmethane-hydrogen-air simulations CHEM1D. With function content can predicted qualitatively pressures temperatures. resulting equations driving force increase flame inner layer temperature.