JP-8+100: The Development of High-Thermal-Stability Jet Fuel

Jet fuel requirements have evolved over the years as a balance of the demands placed by advanced aircraft performance (technological need), fuel cost (economic factors), and fuel availability (strategic factors). In a modern aircraft, the jet fuel not only provides the propulsive energy for flight, but also is the primary coolant for aircraft and engine subsystems. To meet the evolving challenge of improving the cooling potential of jet fuel while maintaining the current availability at a minimal price increase, the US Air Force, industry, and academia have teamed to develop an additive package for JP-8 fuels. This paper describes the development of an additive package for JP-8, to produce JP-8+100. This new fuel offers a 55 C increase in the bulk maximum temperature (from 325 F to 425 F) and improves the heat sink capability by 50%. Major advances made during the development JP-8 + 100 fuel include the development of several new quantitative fuel analysis tests, a free radical theory of autooxidation, adaptation of new chemistry models to computational fluid dynamics programs, and a nonparametric statistical analysis to evaluate thermal stability. Hundreds of additives were tested for effectiveness, and a package of additives was then formulated for JP-8 fuel.more » This package has been tested for fuel system materials compatibility and general fuel applicability. To date, the flight testing ha shown an improvement in thermal stability of JP-8 fuel. This improvement has resulted in a significant reduction in fuel-related maintenance costs and a threefold increase in mean time between fuel-related failures. In this manner, a novel high-thermal-stability jet fuel for the 21st century has been successfully developed.« less

[1]  Sigmar Wittig,et al.  Mechanisms of Coke Formation in Gas Turbine Combustion Chambers , 1995 .

[2]  Kenneth E. Binns,et al.  Extended Duration Thermal Stability Test of Improved Thermal Stability Jet Fuels , 1995 .

[3]  D. R. Ballal,et al.  Studies of Jet Fuel Thermal Stability in a Flowing System , 1993 .

[4]  W. E. Harrison,et al.  Advanced Jet Fuels — JP-4 Through JP-8 and Beyond , 1995 .

[5]  Steven Zabarnick,et al.  Studies of jet fuel thermal stability and oxidation using a quartz crystal microbalance and pressure measurements , 1994 .

[6]  Steven Zabarnick,et al.  Chemical kinetic modeling of jet fuel autoxidation and antioxidant chemistry , 1993 .

[7]  Tim Edwards,et al.  Supercritical fuel deposition mechanisms , 1993 .

[8]  James R. Gord,et al.  Simultaneous measurement of particle size, mass rate of deposition, and oxygen concentration in thermally stressed jet fuel , 1995 .

[9]  Michael M. Coleman,et al.  Potential stabilizers for jet fuels subjected to thermal stress above 400 .degree.C , 1992 .

[10]  S. P. Heneghan.  Global oxidation of jet fuels: determining and understanding the parameters , 1994 .

[11]  Steven D. Anderson,et al.  Static tests of jet fuel thermal and oxidative stability , 1993 .

[12]  A. H. Lefebvre,et al.  Experimental Techniques for the Assessment of Fuel Thermal Stability , 1992 .

[13]  P. J. Marteney,et al.  Thermal decomposition of aircraft fuel , 1986 .

[14]  Steven Zabarnick,et al.  Studies of Jet Fuel Additives using the Quartz Crystal Microbalance and Pressure Monitoring at 140.degree.C , 1994 .

[15]  J. S. Chin,et al.  Influence of Flow Conditions on Deposits From Heated Hydrocarbon Fuels , 1993 .

[16]  E. G. Jones,et al.  Degradation of a Jet A Fuel in a Single-Pass Heat Exchanger , 1995 .

[17]  E. G. Jones,et al.  Formation of insolubles in jet fuels : effects of oxygen , 1992 .

[18]  Chris Lewis,et al.  The Development of an Aviation Fuel Thermal Stability Test Unit , 1994 .

[19]  Surya Pratap Vanka,et al.  A Computational Fluid Dynamics and Chemistry Model for Jet Fuel Thermal Stability , 1990 .

[20]  R. E. Kauffman.  Development of a remaining useful life of a lubricant evaluation technique. III: cyclic voltammetric methods , 1989 .

[21]  M. J. Murray.  Total Phenols in Gasolines and in Cresylic Acids , 1949 .

[22]  M E Cox,et al.  Detection of oxygen by fluorescence quenching. , 1985, Applied optics.

[23]  S. P. Heneghan,et al.  Numerical modeling of jet-fuel autoxidation in flowing systems , 1994 .

[24]  E. G. Jones,et al.  Application of JFA-5 as an Antifouling Additive in a Jet-A Fuel , 1996 .

[25]  Rakesh K. Kapania,et al.  Ethical Standards for Publication of Aeronautics and Astronautics Research , 1992 .

[26]  Tim Edwards.  Deposition during vaporization of jet fuel in a heated tube , 1992 .

[27]  S. P. Heneghan,et al.  Oxidation of jet fuels and the formation of deposit , 1994 .