CUED Publications database

Fuel effects on turbulent premixed jet flame topology as resolved by ch plif imaging

Gandomkar, A and Gkantonas, S and Schihl, J and McManus, TA and Carter, C and Allison, PM (2021) Fuel effects on turbulent premixed jet flame topology as resolved by ch plif imaging. In: UNSPECIFIED pp. 1-10..

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The current study focuses on flame topology and curvature measurements of prevaporized premixed liquid fuel jet flames using CH PLIF. Flames fueled by n-heptane, n-dodecane, and methane are tested in a piloted McKenna burner operating at Re=10,000. CH PLIF experiments are performed using the (v’=0, v’’=0) band and a new image processing technique with topology tracking is employed to assign the detected flame edges as reactant or product stream-oriented. Curvature statistics for both streams and all liquid fuels are obtained and compared with data from a premixed methane-air flame generated by the same burner. The comparison allows for the investigation of non-unity Lewis number (Le ≠ 1) effects on the flame structure and curvature probability density functions while focusing on different regions of the reaction zones. Results indicate differences in the curvature between reactant and product sides of the flame. The curvature of the reactant side reported being higher compared to the product side, which suggests the CH layer edges on the reactant side are more corrugated. The effect of the Le number is investigated by signal-curvature correlation. The correlation of signal and curvature is compared for methane and n-dodecane. It indicates that the n-dodecane fluorescence signal value is higher for negative curvature compared to positive curvature. But for the methane, the positive and negative curvature contains a similar range of fluorescence signal values.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Divisions: Div A > Energy
Depositing User: Cron Job
Date Deposited: 06 Jan 2021 20:03
Last Modified: 06 Apr 2021 01:45