TURBINE FUEL THERMAL STABILITY CFR Coker and Flight Evaluations 600051
FUEL THERMAL STABILITY at the operating temperatures encountered in commercial transports and military weapon systems is an important safety and performance consideration, and yet, undoubtedly, one of the most difficult jet fuel properties to measure. Thermal stability measurements are related to the amount of deposits formed on heating fuel in a jet aircraft and in the engine prior to and during the time it is burned.
New research techniques have been employed to determine the threshold temperatures at which the deposit-forming reactions may occur in fuels. These techniques have been applied extensively in laboratory and flight programs to establish standard procedures for use by the aviation and petroleum industries. The CFR Fuel Coker developed by the Coordinating Research Council is the best-known laboratory method relating fuel stability to service experience.
Current jet fuels are thermally stable at 300/400 F. Fuels that will be thermally stable at higher temperatures will be needed for jet-powered aircraft flying at Mach 3 and above, and evaluations of hydrocarbon fuels are being extended into such areas of superstability.
This paper is a report of the Fuel Thermal Stability Group, Aviation Fuel, Lubricant, and Equipment Research Committee, Coordinating Research Council, Inc.*