Research on Hydrocarbon Fuels and Related Applications
Technical rept. 1 Dec 1969-30 Nov 1970
SOUTHWEST RESEARCH INST SAN ANTONIO TX
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Work has been continued on fuel stability, using gas-drive cokers and other test equipment to investigate the effects of dissolved metals, fuel additives, fuel-system materials, and test conditions on thermal stability ratings. In high-quality fuels, dissolved lead, zinc, iron, and copper in amounts as low as 25-100 parts per billion have been found to degrade the fuel quality seriously. New test devices for measuring fuel stability have been evaluated critically, and new techniques have been developed. The effects of flexible-tank liner materials on JP-7 fuel thermal stability are being studied in long-term simulated storage tests. Apparatus for measuring fuel lubricity has been set up, improved, and operated to show how fuel composition can affect control valve sticking behavior. A new fuel corrosion test has been developed and applied in drafting a recommended specification for fuel corrosion inhibitors. Gas-chromatographic techniques for the analysis of fuels and synthetic lubricants have been developed and improved, and luminescence and phosphorescence spectroscopy have been studied and adapted for this purpose. Short-term studies have been made of coagulant additives, fuel dyes, analytical methods for fuel system icing inhibitor, lead-corroding behavior of fuel corrosion inhibitors, and new methods for measuring fuel demulsification properties. Turbine engine instrumentation and control concepts have been developed to the stage of experimental hardware and are being integrated into a complete control system for a J-85 engine. Operation of an existing information retrieval system has been continued and expanded.