Electric field measurement in electric-field modified flames

The application of an electric field to a flame modifies the characteristics due collective motion charged particles generated within flame. applied mobilises electrons and ions depending on their polarity, leading localised regions space charge with sufficient density either locally amplify or shield field. A fundamental understanding local is essential for both electrically plasma-assisted combustion, because it determines body force as well electron temperature. In this work, we propose method, which independent gas composition temperature, measure using induced second harmonic generation (E-FISH). We successfully apply method laminar nonpremixed counterflow by applying modulated direct current (DC) microsecond duration zero volt pulse. Electric potential distribution are also deduced from measured Furthermore, show importance attachment O2 forming O2? changing polarity DC When anode in oxygen stream, region negative obtained near anode, whereas, when fuel no found. find qualitative trends fields reasonably agree previously reported one-dimensional modelling results. limitations methodology addressed, that ability modulate voltage sub-microsecond timescales required accurate quantitative measurements.