旋回流希薄予混合火炎中の燃料濃度と火炎温度分布の瞬時同時計測(熱工学,内燃機関,動力など)

概要

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Instantaneous and simultaneous measurements of two-dimensional mixing behavior of air and fuel and temperature distributions was conducted by combining acetone LIF and Rayleigh scattering methods. This technique was applied to a partially premixed turbulent flame of CH_4/N_2 fuel using a single pulse and a 266nm beam of Nd: YAG laser. The measured fuel concentration distribution corresponds to the temperature profile in each reaction zone. That is a useful way of investigating characteristics of the reaction zone. Comparing the measured results and the CH_4 concentration which is derived by assuming to mix fuel and air homogeneously and the adiabatic flame temperature in chemical equilibrium, we cleared the validity of the measurement method. Additionally, in a reaction zone where variations of temperature and species concentration affect LIF intensity, we predicted the CH_4 concentration corresponding to the measured temperature assuming perfectly premixed laminar flames, and confirmed the predicted values are close to the measured ones.
2010-01-25