Accession Number : ADA316033

Title :   A Comparative Study into the Coking Resistivity of Swirlplates with Various Surface Finishes.

Descriptive Note : Master's thesis,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s) : Williamson, Stephen F.

PDF Url : ADA316033

Report Date : JUN 1996

Pagination or Media Count : 140

Abstract : Gas turbine nozzle swirlplates used in the T56-A-427 engines of the E-2C Hawkeye aircraft were tested for their resistivity to fuel deposit formation, or 'coking'. The coking occurred after the engines were shut down due to the fuel trapped in the line and temperature ranges present at the nozzle tip. As the coke built up, the holes in the swirlplate clogged and the aircraft required intensive servicing. The search for alternative solutions led to the possibility of using swirlplates that had been polished or coated in an attempt to reduce the coking rates. Several swirlplates surface finishes were investigated.

Descriptors :   *GAS TURBINES, *GAS TURBINE NOZZLES, PRESSURE GRADIENTS, SCANNING ELECTRON MICROSCOPES, AIRCRAFT MAINTENANCE, AIRCRAFT ENGINES, HIGH TEMPERATURE, SURFACE FINISHING, THESES, COMBUSTION DEPOSITS, FLOW RATE, NAVAL AIRCRAFT, FUEL AIR RATIO, LIFE CYCLES, JET ENGINE FUELS, DETERIORATION, CARRIER BASED AIRCRAFT, NOZZLE GAS FLOW, SILICON COATINGS, JET MIXING FLOW, ENGINE AIR SYSTEMS COMPONENTS, ENGINE FUEL SYSTEMS COMPONENTS.

Subject Categories : Jet and Gas Turbine Engines
      Aircraft

Distribution Statement : APPROVED FOR PUBLIC RELEASE