Concentration and Temperature Effects on Soot Formation in Diffusion Flames

Spatial resolution of light field sectioning pyrometry for flame temperature measurement

“…Those vortex-like temperature distributions suggest that there are vortex flows during the flame pulsation, possibly this is the reason for the relatively low temperature of the center area. Considering that the fast flow will decrease the residence time of the fuel, together with the observed local low temperature, such aphenomenon may lead to incomplete combustion and result in soot formation[5,44,46]. These observations demonstrate the LFSP can reconstruct the instantaneous temperature distribution of a turbulent flame with a high spatial resolution.…”

“…Similar trends were reported in the Refs. [1][2][3]11,44].The reconstructed temperature is compared with thermocouple measurements to evaluate the temperature measurement quantitatively. An R-type thermocouple (wire diameter is 0.51 mm) is used to measure the flame temperature along the x-axis with an interval of 1.4 mm while 𝑦 = 47.5 ± 1 𝑚𝑚 and 𝑧 = 0 𝑚𝑚 .…”