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Atomization and Combustion Performance of Antimisting Kerosene and Jet Fuel.

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Final rept. Aug 81-Aug 82,

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Combustion performance of antimisting kerosene AMK containing FM-9 polymer developed by ICI-Americas has been investigated at various levels of degradation restoration of AMK for normal use in a gas turbine engine. To establish the relationship of degradation and atomization to performance in an aircraft gas turbine combustor, sprays formed by the nozzle of a Pratt Whitney JT8-D combustor with Jet A and AMK at 1 atmosphere atm 14.1 lbsq in absolute pressure and 22 C at several degradation levels were analyzed. A new spray characterization technique based on digital image analysis of high resolution, wide field spray images formed under pulsed ruby laser sheet illumination was developed. Combustion tests were performed for these fuels in a JT8-D single can combustor facility to measure combustion efficiency and the lean extinction limit. Correlation of combustion performance under simulated engine operating conditions with nozzle spray Sauter mean diameter SMD measured at 1 atm and 22 C has been observed. Fuel spray SMD and hence the combustion efficiency are strongly influenced by fuel degradation level. Use of even the most highly degraded AMK tested filter ratio 1.2 resulted in an increased in fuel consumption of 0.08 to 0.20 at engine cruise conditions. A bulk degrader for AMK was built, tested and used to prepare fuel for the combustion tests. The effect of moderate heating of the fuel on degrader performance was also investigated. Author

Subject Categories:

  • Safety Engineering
  • Fuels

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