Flame Speeds of Methane-Air, Propane-Air, and Ethylene-Air Mixtures at Low Initial Temperatures

Report presenting flame speeds for methane-air, propane-air, and ethylene-air mixtures at -73 degrees Celsius and for ethylene-air mixtures at -132 degrees Celsius. The data extend the curves of maximum flame speed against initial mixture temperature previously established for the range from room temperature to 344 degrees Celsius. Results regarding velocity profile of the nozzle, flame speeds based on the outer edge of shadow, and a comparison of experimental and theoretical data are provided.