Abstract
Effect of non-equilibrium low temperature plasma on flame structure of lean premixed flame has been experimentally investigated in this work. With increasing an applied voltage up to 3 kV_<OP>, the flame stability limit remains unchanged. This means that the weak plasma does not affect the flame structure of lean premixed flame. In contrast, when the applied voltage exceeds 4 kV_<OP>, the value of equivalence ratio in flame stability limit decreases. The significant decrease in flame temperature allows the flame stability limit to be extended to lower equivalence ratio.
