Abstract
Spark ignition properties of combustible mixtures under high turbulence intensity conditions were studied using an ignition device which was able to vary the energy of capacitance and subsequent sparks independently. High-intensity turbulence was generated by mutual collision of injected mixtures at the center of a cylindrical combustion chamber. From schlieren photographs of flame kernel development, it was observed that turbulence had little effect on the flame kernel shape in the incipient stage. The experimental results showed that addition of the subsequent spark to the capacitance one improved ignition ability especially under high turbulence intensity conditions and that high ignition ability was obtained by an increase in the ratio of the subsequent spark energy to the total spark energy.
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