An Experimental and Kinetic Modelling Study on Laminar Premixed Flame Characteristics of Ethanol/Acetone Mixtures

Yangxun Liu, Weinan Liu, Huihong Liao, Wenhua Zhou and Cangsu Xu
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Yangxun Liu: Zhejiang Technical Institute of Economics, Hangzhou 310018, China
Weinan Liu: College of Energy Engineering, Zhejiang University, Hangzhou 310027, China
Huihong Liao: Vehicle Engineering Center-CAE Technology Development, Geely Automobile Research Institute, Ningbo 315336, China
Wenhua Zhou: College of Energy Engineering, Zhejiang University, Hangzhou 310027, China
Cangsu Xu: College of Energy Engineering, Zhejiang University, Hangzhou 310027, China

Energies, 2021, vol. 14, issue 20, 1-18

Abstract: Since both ethanol and acetone are the main components in many alternative fuels, research on the burning characteristics of ethanol-acetone blends is important to understand the combustion phenomena of these alternative fuels. In the present study, the burning characteristics of ethanol-acetone fuel blends are investigated at a temperature of 358 K and pressure of 0.1 MPa with equivalence ratios ranging from 0.7 to 1.4. Ethanol at 100% vol., 25% vol. ethanol/75% vol. acetone, 50% vol. ethanol/50% vol. acetone, 75% vol. ethanol/25% vol. acetone, and 100% vol. acetone are studied by the constant volume combustion chamber (CVCC) method. The results show that the laminar burning velocities of the fuel blends are between that of 100% vol. acetone and 100% vol. ethanol. As the ethanol content increases, the laminar burning velocities of the mixed fuels increase. Furthermore, a detailed chemical kinetic mechanism (AramcoMech 3.0) is used for simulating the burning characteristics of the mixtures. The directed relation graph (DRG), DRG with error propagation (DRGEP), sensitivity analysis (SA), and full species sensitivity analysis (FSSA) are used for mechanism reduction. The flame structure of the skeletal mechanism does not change significantly, and the concentration of each species remains basically the same value after the reaction. The numbers of reactions and species are reduced by 90% compared to the detailed mechanism. Sensitivity and reaction pathway analyses of the burning characteristics of the mixtures indicate that the reaction C 2 H 2 +H(+M)<=>C 2 H 3 (+M) is the key reaction.

Keywords: ethanol; acetone; spherically expanding flame; laminar burning characteristics; skeletal mechanism (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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