HIGH TEMPERATURE HYDROCARBON FUELS RESEARCH IN AN ADVANCED AIRCRAFT FUEL SYSTEM SIMULATOR ON FUEL AFFB-8-67
Abstract
At elevated temperatures hydrocarbon jet fuels tend to form deposits which decrease heat exchanger efficiency and plug screens and filter elements. A small-scale device is required which has been demonstrated to be applicable to all qualities of hydrocarbon jet fuels and will quantify this tendency in terms meaningful to fuel system designers. In this report, the thermal stability of a fuel (AFFB-8-67) is quantified in terms of amount of deposit in an airframe and engine fuel system simulator. The data obtained from this first fuel series indicate that an expression, derived herein, in terms of time and temperature may predict the amount of deposits formed in any engine system using fuel AFFB- 8-67. Presently, the fuel's tendency to form deposits is determined by visual ratings of color. Two methods for determining the amount of deposits formed in a tube are discussed and a very favorable comparison results. A relationship is shown herein between these calculated values and the color of the deposits. Comparisons made to data obtained in small-scale tests and the FAA-SST Data Correlation Study indicate that a static system (i.e., an 'empty' wing tank) does not rank fuels the same as a dynamic system (i.e., engine system). Therefore, a dual type (static and dynamic) thermal stability device may be indicated.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1967
- Accession Number
- AD0820688
Entities
People
- Harold Goodman
- Royce P. Bradley
- Theodore G. Sickles