Measurement of chemical species and
temperature mapping in flames is essential to understanding the
combustion process. Multiple cameras are conventionally employed for
measurement in such scenarios making the experimental setup not only
cost-intensive but also challenging. To circumvent this, structured
illumination (SI)-based methods are reported for multispecies
chemiluminescence (CL) imaging using a single camera. In this paper,
we demonstrate four-channel SI-based imaging for simultaneous snapshot CH∗ and C2∗ CL imaging and two-color pyrometry
for temperature profiles in a butane diffusion flame. We demonstrate
our approach using individual species and multiple species imaging.
Taking the advantage of the axisymmetric nature of the flame, the Abel
transform is performed on the line-of-sight averaged images to obtain
deconvoluted images. The deconvoluted maps of temperature are compared
with the temperature data obtained by using a physical thermocouple
probe.
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