602 / 2019-01-19 16:21:35

PLIF Analysis of Laminar Premixed Flame of Methyl Palmitate and Its Ester

palmitate; OH-PLIF combustion system; laminar premixed combustion; laminar premixed combustion flame front area; laminar premixed combustion flame propagation velocity

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Methyl palmitate is an important component of biodiesel, and its ester compounds also have important applications in real life. Using laboratory prepared methyl palmitate, butyl palmitate, n-amyl palmitate and isoamyl palmitate, the palmitic acid esters were burned using a PLIF planar laser induced fluorescent flame combustion detection system and passed Matlab software. Subsequent treatment was carried out to obtain the flame propagation speed and the flame front surface area of the four materials at the same air preheating temperature, the flame propagation speed of the four substances at different air preheating temperatures, and the two-dimensional distribution of the OH groups. The equivalence ratios are 0.8, 1.0, 1.2, 1.4, 1.6, and 1.8, respectively. The experimental results show that by changing the combustion equivalent ratio, the front-flow area of the laminar premixed flame and the laminar flame propagation velocity change greatly, and the total signal intensity of OH-PLIF increases with the increase of the equivalence ratio. And at the same equivalent ratio, the laminar flame propagation velocity increases as the air preheating temperature increases.