TY - JOUR
T1 - A jet fuel surrogate formulated by real fuel properties
AU - Dooley, Stephen
AU - Won, Sang Hee
AU - Chaos, Marcos
AU - Heyne, Joshua
AU - Ju, Yiguang
AU - Dryer, Frederick L.
AU - Kumar, Kamal
AU - Sung, Chih Jen
AU - Wang, Haowei
AU - Oehlschlaeger, Matthew A.
AU - Santoro, Robert J.
AU - Litzinger, Thomas A.
N1 - Funding Information:
Work at PU, PSU and UC is part of MURI collaboration supported by the Air Force Office of Scientific Research under Grant Number FA9550-07-1-0515. Work at RPI is supported by AFOSR Grant Number FA9550-07-1-0114, both programs are monitored by Dr. Julian Tishkoff. We are grateful for collaborative discussions with Prof. Kenneth Brezinsky, University of Chicago. We are also grateful to Dr. Tim Edwards, for the provision of POSF 4658, to Dr. Marco Mehl, Lawrence Livermore National Laboratory and his co-workers for making their latest iso-alkane kinetic model available to us prior to publication. Mr. Wenting Sun, Princeton University is appreciated for discussions on model reduction.
PY - 2010/12
Y1 - 2010/12
N2 - An implicit methodology based on chemical group theory to formulate a jet aviation fuel surrogate by the measurements of several combustion related fuel properties is tested. The empirical formula and derived cetane number of an actual aviation fuel, POSF 4658, have been determined. A three component surrogate fuel for POSF 4658 has been formulated by constraining a mixture of n-decane, iso-octane and toluene to reproduce the hydrogen/carbon ratio and derived cetane number of the target fuel. The validity of the proposed surrogate is evaluated by experimental measurement of select combustion properties of POSF 4658, and the POSF 4658 surrogate.(1)A variable pressure flow reactor has been used to chart the chemical reactivity of stoichiometric mixtures of POSF 4658/O2/N2 and POSF 4658 surrogate/O2/N2 at 12.5atm and 500-1000K, fixing the carbon content at 0.3% for both mixtures.(2)The high temperature chemical reactivity and chemical kinetic-molecular diffusion coupling of POSF 4658 and POSF 4658 surrogate have been evaluated by measurement of the strained extinction limit of diffusion flames.(3)The autoignition behavior of POSF 4658 and POSF 4658 surrogate has been measured with a shock tube at 674-1222K and with a rapid compression machine at 645-714K for stoichiometric mixtures of fuel in air at pressures close to 20atm. The flow reactor study shows that the character and extent of chemical reactivity of both fuels at low temperature (500-675. K) and high temperature (900. K+) are extremely similar. Slight differences in the transition from the end of the negative temperature coefficient regime to hot ignition are observed. The diffusion flame strained extinction limits of the fuels are observed to be indistinguishable when compared on a molar basis. Ignition delay measurements also show that POSF 4658 exhibits NTC behavior. Moreover, the ignition delays of both fuels are also extremely similar over the temperature range studied in both shock tube and rapid compression machine experiments. A chemical kinetic model is constructed and utilized to interpret the experimental observations and provides a rationale as to why the real fuel and surrogate fuel exhibit such similar reactivity.
AB - An implicit methodology based on chemical group theory to formulate a jet aviation fuel surrogate by the measurements of several combustion related fuel properties is tested. The empirical formula and derived cetane number of an actual aviation fuel, POSF 4658, have been determined. A three component surrogate fuel for POSF 4658 has been formulated by constraining a mixture of n-decane, iso-octane and toluene to reproduce the hydrogen/carbon ratio and derived cetane number of the target fuel. The validity of the proposed surrogate is evaluated by experimental measurement of select combustion properties of POSF 4658, and the POSF 4658 surrogate.(1)A variable pressure flow reactor has been used to chart the chemical reactivity of stoichiometric mixtures of POSF 4658/O2/N2 and POSF 4658 surrogate/O2/N2 at 12.5atm and 500-1000K, fixing the carbon content at 0.3% for both mixtures.(2)The high temperature chemical reactivity and chemical kinetic-molecular diffusion coupling of POSF 4658 and POSF 4658 surrogate have been evaluated by measurement of the strained extinction limit of diffusion flames.(3)The autoignition behavior of POSF 4658 and POSF 4658 surrogate has been measured with a shock tube at 674-1222K and with a rapid compression machine at 645-714K for stoichiometric mixtures of fuel in air at pressures close to 20atm. The flow reactor study shows that the character and extent of chemical reactivity of both fuels at low temperature (500-675. K) and high temperature (900. K+) are extremely similar. Slight differences in the transition from the end of the negative temperature coefficient regime to hot ignition are observed. The diffusion flame strained extinction limits of the fuels are observed to be indistinguishable when compared on a molar basis. Ignition delay measurements also show that POSF 4658 exhibits NTC behavior. Moreover, the ignition delays of both fuels are also extremely similar over the temperature range studied in both shock tube and rapid compression machine experiments. A chemical kinetic model is constructed and utilized to interpret the experimental observations and provides a rationale as to why the real fuel and surrogate fuel exhibit such similar reactivity.
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U2 - 10.1016/j.combustflame.2010.07.001
DO - 10.1016/j.combustflame.2010.07.001
M3 - Article
AN - SCOPUS:78049302964
SN - 0010-2180
VL - 157
SP - 2333
EP - 2339
JO - Combustion and Flame
JF - Combustion and Flame
IS - 12
ER -