One-dimensional tomography of axisymmetric temperature distribution with limited TDLAS data by using three-point Abel deconvolution

In this paper, a three-point Abel deconvolution algorithm was employed to reconstruct one-dimensional axisymmetric temperature distribution of the flame with limited tunable diode laser absorption spectroscopy (TDLAS) data. To suppress the background noise and improve the sensitivity of measurement, the wavelength modulation spectroscopy (WMS) technique is adopted in TDLAS measurement at 7185.597 cm
^-1
and 7444.36 cm
^-1
. Split by a 2×8 fiber-coupler, the collimated laser in eight parallel channels penetrate the axisymmetric flame generated by a porous burner. Detected by eight photodiode detectors, limited measurement data of eight projections is obtained and used to retrieve the one-dimensional axisymmetric temperature distribution by using three-point Abel deconvolution. Simulation results validated the feasibility of this approach.