Mapping of luminescent species in a flame front

In this work, the luminescent species present in flame front at combustions of ethanol and acetylene, in a long tube and without the air influence, we re mapped. The flame emission was analyzed from 300 to 600 nm, with steps o f 50 nm, and at 306.4, 431.3 and 516.5nm, corresponding to the emission max ima of OH, CH and C-2 excited radicals. Three gaseous mixtures with partial pressures of 2.00 kPa acetylene with 7.20 kPa oxygen, 4.53 kPa acetylene w ith 4.67 kPa oxygen, and 3.33 kPa ethanol with 6.67 kPa oxygen were studied . The results show that the fuel enrichment in the combustion of acetylene/ O-2 enhanced the concentration of the C-2 excited radical relative to the c oncentrations of OH and CH excited radicals in the flame front. For the com bustion of fuel-rich mixtures of ethanol/O-2 the main species in the flame front was the CH excited radical.