Velocity measurement method based on TDLAS for combustion flow

Aiming at the velocity measurement in harsh combustion flow with high temperature and high speed, the velocity measurement method based on tunable diode laser absorption spectroscopy(TDLAS)was presented. The two-crossed-beams scanned-wavelength direct absorption spectroscopy(SDAS)system with 7185.597cm^-1 as center frequency was designed for the velocity measurement of the flow in incoming simulated system, which used the combustion of kerosene fuel to heat the air. Compared with the one-dimensional theoretical calculated value and numerical simulation value, the relative deviations are less than 10%, showing that the velocity measurement using TDLAS is effective value for combustion flow.