Accession Number : ADA285583


Title :   Development of An Advanced JP-8 Fuel


Descriptive Note : Final rept. Aug 1990-Jan 1993


Corporate Author : PRATT AND WHITNEY WEST PALM BEACH FL


Personal Author(s) : Biddle, Tedd B


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a285583.pdf


Report Date : Dec 1993


Pagination or Media Count : 45


Abstract : Technical effort was directed at increasing the design limit of current JP-8 fuel from 325 deg F (163 deg C) to 425 deg F (218 deg C) at the fuel nozzle. The objective was to accomplish this near-term thermal stability goal solely through the use of a fuel soluble additive package. JP-Thermally stable fuel was considered the thermal stability target since it has the high- temperature properties sought from the significantly more economical JP-8 + 100 formulation. The additives were evaluated in an additive-free Jet A considered typical of fuel most likely to be encountered in the field. DuPont JFA-5, currently the only accepted thermally stability improving additive, was considered state of the art and used as a bench mark. Additive manufacturers were surveyed and solicited for candidate additives that had potential for improving fuel thermal oxidative stability. Test methods were developed and/or refined for use in screening additives. Using the Hot Liquid Process Simulator (HLPS) in conjunction with a LECO Carbon Determinator, 152 additives were screened. Additive performance was ranked based on surface carbon and differential pressure. Additional screening was performed using the Isothermal Corrosion Oxidation Test (ICOT). Additives screened included oxygen, sulfur, and nitrogen-type antioxidants; dispersants; detergents; metal deactivators; antifoulants; and proprietary thermal stability improvers. Twenty-seven experimental blends comprised of various additive combinations were tested. Five baseline fuels were evaluated.


Descriptors :   *THERMAL STABILITY , *JET ENGINE FUELS , *FUEL ADDITIVES , TEST AND EVALUATION , PRESSURE GRADIENTS , CORROSION , SOLUTIONS(MIXTURES) , CARBON , OXYGEN , THERMAL CYCLING TESTS , FUEL NOZZLES , ENGINE FUEL SYSTEMS COMPONENTS , ANTIOXIDANTS , KEROSENE , SULFUR , OXIDATION , NITROGEN , STATE OF THE ART , DISPERSANTS , HIGH TEMPERATURE , FORMULATIONS


Subject Categories : Thermodynamics
      Fuels


Distribution Statement : APPROVED FOR PUBLIC RELEASE