Revised procedure for the measurement of particulate matter in Naval JP5 aviation turbine fuel (F44; AVCAT) using the contaminated fuel detector (CFD)
- Aeronautical and Maritime Research Lab., Victoria (Australia)
USA Military Specification MIL-D-22612 provides a procedure for measurement of particulate levels in Naval aviation gas turbine engine JP5 fuel (F44; RAN AVCAT) using the contaminated fuel detector (CFD). Evaluation of this procedure within the specification has revealed significant shortcomings in the application of the theoretical principles upon which the method is based. CFD measurements have been compared to gravimetric results from ASTM D2276, which provides accurate determination of concentrations of particulate matter in JP5. Inaccuracies evident in the CFD readings have been found to relate to the high sensitivity of the CFD to variations in fuel particulate extinction coefficients (ECs) (relating to fuel sediment colour) and to an error in the application of light transmittance theory in the recommended method. This report demonstrates that accurate CFD determination of JP5 particulate concentrations depends on spectrophotometric measurement of a narrow range of ECs of particulate matter. A range of fuel sediments derived from Australian naval ship and shore fuel storages was studied. It was observed that the CFD plot, which is in light transmittance mode, in theory provides a curved line graph against the gravimetric test results, whereas MIL-D-22612 describes a straight line graph. It was concluded that this must be an approximation. However, conversion of light transmittance data derived from the CFD into the reciprocal logarithm to give light absorbance data was shown to give a straight line graph which corresponded well with the gravimetric results. This relationship depended on construction of the graph on the basis of a narrow range of known particulate ECs. The conversion to absorbance gave improved correlation for JP5 particulate measurements with gravimetric procedures, using the CFD.
- Research Organization:
- USDOE Assistant Secretary for Fossil Energy, Washington, DC (United States). Office of Technical Management
- OSTI ID:
- 68683
- Report Number(s):
- CONF-941022-Vol.2; ON: DE95009411; TRN: 95:003870-0005
- Resource Relation:
- Conference: 5. international conference on stability and handling of liquid fuels, Rotterdam (Netherlands), 3-7 Oct 1994; Other Information: PBD: Apr 1995; Related Information: Is Part Of Proceedings of the 5th international conference on stability and handling of liquid fuels. Volume 2; Giles, H.N. [ed.]; PB: 514 p.
- Country of Publication:
- United States
- Language:
- English
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