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Study on the Laminar Characteristics of Ethanol, n-Butanol and n-Pentanol Flames
ISSN: 0148-7191, e-ISSN: 2688-3627
Published September 01, 2015 by SAE International in United States
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Due to serious energy crisis and pollution problem, interest in research of the alternative fuels is increasing over the world. Alcohol fuels are always considered to be promising alternative fuels. Lower alcohols owning high octane number is good octane enhancer for SI (Spark ignition) engine, however is difficult to be used in CI (Compression Ignition) engines. Higher alcohols like pentanol with higher energy content, poor water solubility and higher cetane number are good choice for the CI engines. In this study, laminar flame behaviors of ethanol-air, n-butanol-air and n-pentanol-air mixtures at 393 K and 0.1 MPa are compared and analyzed with the spherical propagating flames. Comparison of the laminar flame speeds measured in the previous studies (Li et al.) show that laminar flame speed of ethanol is the fastest with slower flame speed of n-butanol and n-pentanol at lean mixture. At rich mixture, three alcohols present very close values. The effective Lewis number of n-pentanol is the biggest, and then n-butanol and ethanol. The difference among the three fuels is decreasing with the increase of equivalence ratio. However, all the values are bigger than one and indicating diffusively stable flame front. Flame thicknesses of three alcohol fuels are very close, while the wave number decreases in the order of n-pentanol, n-butanol and ethanol and shows the hydrodynamic instability is enhanced with the carbon number increasing. Combining with the schlieren pictures, it is seen that ethanol has the more stable flame front at very rich mixture, which indicates hydrodynamic instability plays the dominant role at the rich condition.
CitationLi, Q., Cheng, Y., Jin, W., Chen, Z. et al., "Study on the Laminar Characteristics of Ethanol, n-Butanol and n-Pentanol Flames," SAE Technical Paper 2015-01-1933, 2015, https://doi.org/10.4271/2015-01-1933.
- Cooney C., Wallner T., McConnell S., Gillen J. C., Abell C., Miers S. A., Naber J. D.. Effects of blending gasoline with ethanol and butanol on engine efficiency and emissions using a direct-injection, spark-ignition engine. ASME. 2009, 157-165.
- Kohse-Hoeinghaus K., Osswald P., Cool T., Kasper T., Hansen N., Qi F., Westbrook C. K., Westmoreland P.. Biofuel Combustion Chemistry: From Ethanol to Biodiesel. Angewandte Chemie-international Edition - ANGEW CHEM INT ED. 2010, 49(21): 3572-3597.
- Yucesu H. S., Topgul T., Cinar C., Okur M.. Effect of ethanol-gasoline blends on engine performance and exhaust emissions in different compression ratios. Applied Thermal Engineering. 2006, 26(17-18): 2272-2278.
- Sathiyagnanam A. P., Saravanan C. G., Gopalakrishnan M.. Hexanol-ethanol diesel blends on DI-diesel engine to study the combustion and emission. Proceedings of the World Congress on Engineering. 2010.
- Gautam M., Martin D. W.. Combustion characteristics of higher-alcohol/gasoline blends. Proceedings of the Institution of Mechanical Engineers Part a-Journal of Power and Energy. 2000, 214(A5): 497-511.
- Gautam M., Martin D. W., Carder D.. Emissions characteristics of higher alcohol/gasoline blends. Proceedings of the Institution of Mechanical Engineers Part a-Journal of Power and Energy. 2000, 214(A2): 165-182.
- Wei L., Cheung C. S., Huang Z.. Effect of n-pentanol addition on the combustion, performance and emission characteristics of a direct-injection diesel engine. Energy. 2014, 70(0): 172-180.
- Campos-Fernandez J., Arnal J. M., Gomez J., Lacalle N., Dorado M. P.. Performance tests of a diesel engine fueled with pentanol/diesel fuel blends. Fuel. 2013, 107(0): 866-872.
- Liao S., Jiang D., Huang Z., Zeng K., Cheng Q.. Determination of the laminar burning velocities for mixtures of ethanol and air at elevated temperatures. Applied Thermal Engineering. 2007, 27(2-3): 374-380.
- Bradley D., Lawes M., Mansour M. S.. Explosion bomb measurements of ethanol-air laminar gaseous flame characteristics at pressures up to 1.4MPa. Combustion and Flame. 2009, 156(7): 1462-1470.
- Gu X., Huang Z., Wu S., Li Q.. Laminar burning velocities and flame instabilities of butanol isomers-air mixtures. Combustion and Flame. 2010, 157(12): 2318-2325.
- Gu X., Li Q., Huang Z.. Laminar Burning Characteristics of Diluted N-Butanol/Air Mixtures. Combustion Science and Technology. 2011, 183(12): 1360-1375.
- Li Q., Hu E., Zhang X., Cheng Y., Huang Z.. Laminar Flame Speeds and Flame Instabilities of Pentanol Isomer-Air Mixtures at Elevated Temperatures and Pressures. Energy & Fuels. 2013, 27(2): 1141-1150.
- Togbe C., Halter F., Foucher F., Mounaim-Rousselle C., Dagaut P.. Experimental and detailed kinetic modeling study of 1-pentanol oxidation in a JSR and combustion in a bomb. Proceedings of the Combustion Institute. 2011, 33: 367-374.
- Veloo P. S., Wang Y. L., Egolfopoulos F. N., Westbrook C. K.. A comparative experimental and computational study of methanol, ethanol, and n-butanol flames. Combustion and Flame. 2010, 157(10): 1989-2004.
- Noorani K., Akih-Kumgeh B., Bergthorson J.. Comparative High Temperature Shock Tube Ignition of C1-C4 Primary Alcohols. Energy & Fuels. 2010, 24(11): 5834-5843.
- Li Q., Hu E., Cheng Y., Huang Z.. Measurements of laminar flame speeds and flame instability analysis of 2-methyl-1-butanol-air mixtures. Fuel. 2013, 112(0): 263-271.
- Li Q., Fu J., Wu X., Tang C., Huang Z.. Laminar Flame Speeds of DMF/Iso-octane-Air-N2/CO2 Mixtures. Energy & Fuels. 2012. 26(1): 917-925.
- Matalon, M. Flame dynamics. Proceedings of the Combustion Institute. 2009, 32(1): 57-82.