Accession Number : ADA520862


Title :   Flash Point and Chemical Composition of Aviation Kerosene (Jet A). Revision


Descriptive Note : Research study


Corporate Author : CALIFORNIA INST OF TECH PASADENA GRADUATE AERONAUTICAL LABS


Personal Author(s) : Shepherd, J E ; Nuyt, C D ; Lee, J J ; Woodrow, J E


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a520862.pdf


Report Date : 26 May 2000


Pagination or Media Count : 39


Abstract : The relationship between chemical composition, flash point, and ignition energy was examined for eight samples of aviation kerosene (Jet A) with flash points between 29 deg C (84 deg F) and 74 deg C (165 deg F). We report the results of liquid characterization by two different laboratories. We use the results of headspace gas chromatography carried out by Woodrow and Seiber to characterize the vapor composition at liquid mass loading fractions of 3 and 400 kg/m3. The composition data were analyzed to obtain analytical representations of vapor pressure and average molar mass as a function of temperature for each flash point fuel. The relationship between composition and flash point is examined by using two prediction methods. The first method is based on the notion of a critical value of fuel-air mass ratio at the flammability limit. The second method is based on Le Chatelier's rule for flammability limits. Both methods show a reasonable correlation between measured and predicted flash point. The relationship between flash point and ignition temperature threshold at a fixed spark ignition energy was examined for four fuels. A linear correlation was obtained for an ignition energy of 0.3 J. The effect of fuel weathering was examined by determining the flashpoints of seven fuel samples obtained from flight tests. The flash point increased about 8?C for fuel that had been exposed to 5 take-off, cruise, and landing cycles.


Descriptors :   *KEROSENE , *FLASH POINT , *AVIATION FUELS , TEMPERATURE , PREDICTIONS , LIQUIDS , THRESHOLD EFFECTS , ENERGY , CYCLES , CHEMICAL COMPOSITION , AERONAUTICS , CORRELATION , LIMITATIONS , SAMPLING , FUEL AIR RATIO , IGNITION , VAPOR PRESSURE , COMPOSITION(PROPERTY) , WEATHERING , FLAMMABILITY , LANDING , METHODOLOGY , SPARK IGNITION , LINEAR SYSTEMS , FLIGHT TESTING


Subject Categories : Fuels


Distribution Statement : APPROVED FOR PUBLIC RELEASE