Determination of Fuel/Air Mass Ratios for Jet Fuels at Their Flash Point Temperatures Final rept

摘要

The goal of this project was to determine fuel vapor densities and, ultimately, fuel-to-air mass ratios (FAMRs) for 11 commercial jet fuels at their flash point temperatures. The vapor composition of each fuel sample was modeled at each flash point temperature, rounded to the nearest whole value, using an alkane reference standard (pentane), with the results expressed as total vapor density for each fuel sample. In addition, the liquid composition of each fuel sample was modeled using 16 alkane reference standards (C(sub 5)-C(sub 20)), again with the results expressed as total vapor density. From these vapor density values, FAMRs were derived. From the determination of vapor composition, the measured vapor densities fell in the range 44.0-54.0 g/m(sup 3), depending on the flash point temperature, and the FAMRs fell in the range 0.041-0.047, with an average value of 0.044 and a percent relative standard deviation (%RSD) of 4.5. Based on the liquid composition, vapor densities calculated for the exact flash point temperatures fell in the range 46.5-50.4 g/m(sup 3), and the FAMRs fell in the range 0.043-0.045, with an average value of 0.044 and a %RSD of 2.3. These results demonstrate that the FAMR is a constant value at the flash point and this value is 0.044.