Three-Dimensional (3-D) Temperature Measurement in a Low Pressure Flame Reactor Using Multiplexed Tunable Diode Laser Absorption Spectroscopy (TDLAS)
H-N. Yang, B. Yang, X-S. Cai, C. Hecht, T. Dreier and C. Schulz
Water vapour (H2O) multiplexed tunable diode laser absorption spectroscopy (TDLAS) was utilized to obtain spatially-resolved temperature information inside a low pressure premixed flame reactor. The temperature distribution was obtained by assuming the temperature to be constant in variable lengths along the line-of-sight (LOS temperature bins). The length fraction of postulated temperature bins along the LOS was determined. Multi-line NO laser-induced fluorescence (LIF) imaging technique was used to validate the spatial temperature distributions deduced from H2O TDLAS. By moving the burner head perpendicularly to the observation zone, three-dimensional (3-D) temperature fields were obtained.
Keywords: Tunable diode laser absorption spectroscopy (TDLAS), flame reactor, flame temperature, temperature-binning technique, three-dimensional
(3-D) distribution