Effects of flame temperature and radiation properties on infrared light field imaging

Abstract

In measuring the flame temperature and radiative properties, the light field camera is subject to the visible bands of the spectral snapshot measurement in a single shot. In this paper, the infrared light field camera is proposed to improve the spectral range of detection. The effects of the participating media on the infrared light field imaging are clarified. The temperature detection ranges of visible, near-infrared, and mid-infrared spectral bands are analyzed. The coupling effects of radiative properties of gas and soot on the mid-infrared light field imaging are compared. The light field imaging results show that the temperature detection range in the mid-infrared band is twice as much as that in the visible band. The gas and soot radiative properties have recognizable effects on the mid-infrared light field images. The absorption coefficient takes the primary role, while the scattering effects by 0.275. The mid-infrared light field camera is used to take snapshots of the flame. The temperature detection range is wider than the visible band, the gas and soot laden changes the flame structure. This work can be used as theoretical support for the design and application of infrared light field camera to diagnose the flame temperature and radiation properties.