Laminar burning velocities of n-butanol + air mixtures were measured experimentally at elevated mixture temperatures using an externally heated meso-scale channel configuration. The measurements were carried out at atmospheric pressure for an equivalence ratio range 0.7–1.3 and unburnt mixture temperature range of 350–600 K. Planar, stretch free and nearly adiabatic flames were stabilized in the diverging channel and used to extract the laminar burning velocity data based on mass conservation between the channel inlet and flame stabilization point. A skeletal kinetic-mechanism (124 species and 943 reactions) based on a previous model of Sarathy (2014) was developed to compare the present experimental results with mechanism predictions. Besides the skeletal model predictions, n-butanol experimental results were also compared with other recent kinetic models reported in literature. The effect of unburnt mixture temperature on burning velocity of n-butanol + air mixtures was evaluated using the power-law correlation: . The variation of temperature exponent () with equivalence ratio ( was reported also for the first time. The values exhibit a non-linear inverted parabolic profile with a minimum value occurring for slightly rich mixtures at Φ = 1.1.
|Original language||English (US)|
|Number of pages||9|
|State||Published - Mar 22 2019|
Bibliographical noteKAUST Repository Item: Exported on 2020-10-01
Acknowledgements: The first author would like to acknowledge the financial support for this work from Department of Science and Technology, Govt. of India wide Grant No. SB/S3/COMB-001/(2014). Research conducted by AF and SMS of Clean Combustion Research Center was supported by competitive research funding from King of Science Abdullah University and Technology (KAUST).