Measurements of laminar flame speeds of liquid fuels: Jet-A1, diesel, palm methyl esters and blends using particle imaging velocimetry (PIV)

Abstract Laminar flame speeds of practical fuels including Jet-A1, diesel, palm methyl esters (PME) and blends of PME with diesel and Jet-A1 fuels are determined using the jet-wall stagnation flame configuration and particle imaging velocimetry (PIV) technique. The PME/Jet-A1 and PME/diesel blends are prepared by mixing 10%, 20% and 50% of PME with Jet-A1 and diesel fuels by volume respectively. The experiments are performed over a range of stoichiometries at elevated temperature of 470 K and atmospheric pressure under premixed conditions. The reference flame speed and imposed strain rates are determined from the two dimensional velocity profiles. Subsequently, laminar flame speeds are derived by extrapolating the reference flame speed back to zero strain rates. Experimental results are compared to experimental and simulation data from the literature for large n-alkanes and practical fuels. The results show that laminar flame speeds of Jet-A1 fuel are similar to those of n-decane and n-dodecane, indicating their potential use as surrogate fuels. Peak laminar flame speeds for diesel/air and PME/air mixtures at 470 K are similar, around 86.7 and 86.5 cm/s at equivalence ratios around 1.10 and 1.14 respectively, and that both mixtures exhibit lower flame speeds compared to n-decane and n-dodecane at fuel-leaner and stoichiometric conditions. Blending PME with Jet-A1 and diesel leads to reduced laminar flame speeds on the lean side but increased on the rich side.

[1]  Tianfeng Lu,et al.  Experimental and kinetic modeling study of extinction and ignition of methyl decanoate in laminar non-premixed flows , 2008 .

[2]  P. Glaude,et al.  Experimental study of the oxidation of large surrogates for diesel and biodiesel fuels , 2009 .

[3]  Tim Edwards,et al.  Surrogate Mixtures to Represent Complex Aviation and Rocket Fuels , 2001 .

[4]  P. Dagaut,et al.  Rapeseed oil methyl ester oxidation over extended ranges of pressure, temperature, and equivalence ratio: Experimental and modeling kinetic study , 2007 .

[5]  H. Curran,et al.  Extinction and Autoignition of n-Heptane in Counterflow Configuration , 2000 .

[6]  S. Davis,et al.  Determination of and Fuel Structure Effects on Laminar Flame Speeds of C1 to C8 Hydrocarbons , 1998 .

[7]  Norbert Peters,et al.  A surrogate fuel for kerosene , 2009 .

[8]  Kamal Kumar,et al.  Laminar flame speeds and extinction limits of preheated n-decane/O2/N2 and n-dodecane/O2/N2 mixtures , 2007 .

[9]  Frederick L. Dryer,et al.  BURNING VELOCITIES AND A HIGH-TEMPERATURE SKELETAL KINETIC MODEL FOR n-DECANE , 2004 .

[10]  Chung King Law,et al.  Further considerations on the determination of laminar flame speeds with the counterflow twin-flame technique , 1994 .

[11]  Chih-Jen Sung,et al.  Laminar flame speeds of primary reference fuels and reformer gas mixtures , 2004 .

[12]  Moshe Matalon,et al.  On the burning velocity of stretched flames , 1991 .

[13]  Chung King Law,et al.  A Comprehensive Study of Methanol Kinetics in Freely-Propagating and Burner-Stabilized Flames, Flow and Static Reactors, and Shock Tubes , 1992 .

[14]  J. Westerweel.  Fundamentals of digital particle image velocimetry , 1997 .

[15]  H. Metghalchi,et al.  FLAME STRUCTURE AND BURNING SPEED OF JP-10 AIR MIXTURES , 2006 .

[16]  Philippe Dagaut,et al.  The ignition, oxidation, and combustion of kerosene: A review of experimental and kinetic modeling , 2006 .

[17]  F. Egolfopoulos,et al.  Wall effects on the propagation and extinction of steady, strained, laminar premixed flames , 1997 .

[18]  Noriyuki Mori,et al.  Fundamental combustion characteristics of palm methyl ester (PME) as alternative fuel for gas turbines , 2008 .

[19]  G Nagarajan,et al.  Relating the cetane number of biodiesel fuels to their fatty acid composition: A critical study , 2009 .

[20]  C. Westbrook,et al.  Detailed chemical kinetic oxidation mechanism for a biodiesel surrogate , 2007 .

[21]  Chung King Law,et al.  Laminar flame speeds and oxidation kinetics of benene-air and toluene-air flames , 1996 .

[22]  Mark P. Wernet,et al.  Development of digital particle imaging velocimetry for use in turbomachinery , 2000 .

[23]  Chunsheng Ji,et al.  Propagation and extinction of premixed dimethyl-ether/air flames , 2009 .

[24]  Kamal Kumar,et al.  Laminar Flame Speeds of Preheated iso-Octane/O2/N2 and n-Heptane/O2/N2 Mixtures , 2007 .

[25]  S. Davis,et al.  Laminar flame speeds and oxidation kinetics of iso-octane-air and n-heptane-air flames , 1998 .

[26]  S. Fernando,et al.  Flame temperature analysis of biodiesel blends and components , 2008 .