Abstract
In order to clarify the turbulent burning velocity of hydrogen mixtures including hydrocarbons as a multicomponent fuel mixture, both lean and rich hydrocarbon(methane and propane)-added hydrogen mixtures as two-component fuel mixtures were prepared while maintaining the laminar burning velocity approximately constant. A distinct difference in the measured turbulent burning velocity at the same turbulence intensity is observed depending on the additional rate of hydrocarbon, the equivalence ratio and the kind of hydrocarbon, even the laminar burning velocities are approximately the same. The burning velocities of lean mixtures change almost monotonously as the rate of addition changes, whereas the burning velocities of the rich mixtures show no such tendency. This trend can be explained qualitatively based on the mean local burning velocity, which is estimated by taking into account the preferential diffusion effect for each fuel component. In addition, a model of turbulent burning velocity proposed for single-component fuel mixtures can be applied to hydrocarbon-added lean hydrogen mixtures by considering the estimated mean local burning velocity of each fuel.
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