A Technique for Evaluating Fuel Mist Flammability.

Abstract : Experimental apparatus and procedures for evaluating the mist flammability of neat and fire-safety fuels have been developed. The apparatus, which was developed as part of this laboratory's fuel safety program, is capable of evaluating fuel mist flammability under conditions ranging from low air shear to extremely high air shear. Fuel is delivered through a capillary at a controlled rate, and three impinging air streams form a mist at the point of impingement. The fuel mist passes through an overwhelming ignition source to avoid marginal ignition. Flashback from the ignition source toward the fuel capillary is interpreted as a measure of mist flammability. The technique provides a rapid and reliable laboratory research tool. (Modified author abstract)