Abstract
For lean burn in gasoline engines, combustion in high flow field is demanded and steady spark ignition in high velocity flow is required in advanced ignition. The flow field stretches discharge channel in the ignition phase and it affects the voltage and current profile. From this background, experimental studies were conducted focusing on the discharge channels stretched by the flow. The small wind tunnel which controls the flow velocity using orifices is used for experiments. Electric current and voltages were measured and its characteristics were discussed. The discharge channels are observed by high speed camera and the length of discharge channel was estimated. Using electric current and voltages, line resistance was estimated and was shown as the function of the electric current. The relationship between the line resistance and electric current was compared with the previous works.
