Pages 61-62
For better understanding the combustion characteristics of DME, emission intensities of DME combustion radicals from pre-mixed burner flame were measured by using spectroscope and photomultiplier. Large peaks of emission intensity from pre-mixed and diffusion DME flames were shown near 310 nm, 430 nm and 515 nm. They are OH, CH and C_2 radicals respectively. However, the emission intensity of diffusion DME flame was lower than that of pre-mixed DME flames. Comparing DME with butane pre-mixed flame, the peaks of emission intensities fueled with butane were much stronger than that with DME. In case of diffusion butane flame, there is continuous spectrum over 350 nm.
