FLAME INHIBITION RESEARCH

The spherical flame was operated under maximum pressure and flow conditions in an effort to circumvent the wall cooling problems previously reported. Studies of this flame indicated that the adiabadic temperature maximum was attained but that 0 atom concentration remained out of equilibrium. It was concluded that the solution to the problem was either an increase in flask size or the use of a Flat Flame; therefore, an all glass, ceramic, and Teflon burner has been constructed and tested. The system employs a flat flame burner and the sampling system has been designed so that temperatures can be measured using the pneumatic probe technique; and provision has been made to determine radical concentrations using the scavenger sampling probe technique. The scavenger sampling probe technique for oxygen atoms has been compared with gas phase titration in an electric discharge. The two techniques agreed very well, provided certain precautions are taken. Some limitations of the gas phase titration technique are discussed. (Author) See also AD-278 058.