Two-dimensional temperature field measurement in a methane-air flame by PLIF

In this paper, the principle and experimental setup of PLIF is discussed. Through the proper choice of OH excited lines and improving the beam quality of the laser by spatial filter, the two-dimensional temperature field in a methane-air flame can be quntitatively measured. Veriation relationships of flam temperature with high above and distance from the centre of a furnace face were given and discussed. Compared to the results of CARS, the uncertainty of the temperature field in the measurement is less than 5%.