Structure of Counterflow Diffusion Flame of Ethanol

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Abstract
The opposed jet assembly has been adapted for stabilizing a counter flow diffusion flame of ethanol. Data on the thermo-aerodynamic structure of the flame, obtained with the help of interferometric and particle track techniques, have been presented and analysed to yield the heat release rate. The maximum flame temperature is found to be close to adiabatic and the net heat release is in agreement with the theoretically expected value. The luminous flame is accompanied by endothermic zones on both the fuel and oxygen sides. Mass spectromctric analysis of the flame gases is found to confirm the presence of ethanol pyrolysis on the fuel side and to point out the possibility of significant chemical reactions on the oxygen side. The observations thus tend to strengthen the earlier findings (of endothermic zones) on gaseous diffusion flames.

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