Study of radical luminescences of premixed flames equivalence ratio dependence on radical luminescence spectra from gasoline; methanol and methane flames

摘要

The possibility of combustion diagnostics through teh measurement of radical luminescene is discussed in this paper.Radical species in premixed flames of gasoline,methanol and methane are explored using spectroscopic measurements.It was found that major species having strong radical luminescence are OH,CH and C_2 for gasoline and methane,adn OH and Ch for methanol.The effects of the euqivalence ratio and premixed gas temperature on spectral intensities are discussed.We found that the correlation between the equivalence ratio and spectrum intensity ratio of two radical species is linear.There is a possiblity of predicting the equivalence ratio from the measurment of the radical emission intensity of a flame.