CH(A-X) and OH(A-X) optical emission in an axisymmetric laminar diffusion flame

Steady-state concentrations of electronically excited CH(A(2)Delta) and OH( A(2)Sigma(+)) are extracted from previous quantitative measurements of opti cal emission from an axisymmetric laminar diffusion flame [K. T. Walsh, M. B. Long, M. A. Tanoff, and M. D. Smooke, Twenty-Seventh Symposium (Internat ional) on Combustion, The Combustion Institute, Pittsburgh, 1998, pp. 615-6 23]. The flame is modeled with a two-dimensional transport and detailed che mistry explicitly augmented with the reactive, radiative, and energy transf er collisional processes to produce and remove electronically excited CH(A) and OH(A). Computations predict concentrations of CH(A) and OH(A) which ag ree with the measurement within a factor of 6 or better, a significant impr ovement compared to the earlier report. (C) 2000 by The Combustion Institut e.