Emulsified Fuel System Design Study
Abstract
The object of the research was to determine the design features and techniques which would permit the fuel system to deliver emulsified JP-4 fuel from the fuel tanks of aircraft to the engine in a dependable manner. The study was carried out in a series of experimental investigations covering emulsion behavior, fuel lines and fittings, fuel boost pumps fuel filtering and decontamination, fuel quantity measurement, fuel tank design, and fueling techniques. The studies indicated that current systems are usable providing that fuel lines are made of, or lined with, polytetrafluoroethylene or polycarbonate and that line inside diameters are not less than 1.0 inch. Fuel tanks should have bottoms which are angled 30 degrees, and the tank interior should be lined either with polytetrafluoroethylene or with polyethylene. Filtration of the emulsified fuel is limited to approximately 115 microns. Centrifugal fuel boost pumps perform with reduced efficiency, but some are usable. Inlets for the pumps should be modified to reduce fuel hang-up, and provision should be made to eliminate emulsion breakage by the pumps during periods of low flow demand. A capacitance gauge with insulated probe was found to be satisfactory for measurement of fuel quantity.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1969
- Accession Number
- AD0864118
Entities
People
- Richard H. Hollinger
Organizations
- Franklin Institute