| As the increasing demand of the resource in our society, it is so necessary to research the renewable fuels instead. Hydrogen is a kind of renewable and clean energy, which has no carbon elements so that it won’t produce the carbon emissions with a comparison to other fuels. Its only poisoned emission is NOx when it is burned out. However, considering the current technical expertise, Hydrogen is very expensive and the infrastructure for filling Hydrogen is quite a few. Besides, Hydrogen container is the biggest problem for engine to widely use. So far, gasoline is the most widely used engine fuel and cannot be replaced in a short time. Therefore, gasoline blended with hydrogen is the most practical way to slow down the increasing utilization for fossil fuel. It is essential to make a research of the gasoline-hydrogen mixture fuels.In order to exploit its combustion mechanization, using high-speed schlieren photography, the burning properties and the ignition properties of gasoline and hydrogen propagating spherical laminar premixed flame were researched in a constant volume combustion bomb at different equivalence ratio(0.8-1.4) and the mole fraction of hydrogen in the gasoline-hydrogen mixture was varied from 0% to 50%. MATLAB is a key tool to analyze the pictures and grasp the flame random. Then two optimization functions are used to calculate the related burning factors and lean lower flammability limit, such as unstretched flame propagation speed and Markstein length.The results show that the nonlinear simulation methodology can be more fitted for the experiments’ data comparing to the linear methodology. The stretched flame propagation speed increases with the rise of the percentage of hydrogen. Moreover, in the same hydrogen amount, Markstein length decreases and unstretched flame propagation speed increases first and then decreases and it moves to the denser mixtures with the rise of equivalence ratio. Hydrogen can help gasoline enlarge the burning range. |
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