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Combustion Science and Technology Volume 178, 2006 - Issue 1-3
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Part 3: High-Pressure Chemical Kinetics and Flames

CRACKING AND DEPOSITION BEHAVIOR OF SUPERCRITICAL HYDROCARBON AVIATION FUELS

TIM EDWARDS* Air Force Research Laboratory, Wright-Patterson AFB, Ohio, USACorrespondence[email protected]
Pages 307-334 | Received 04 Jun 2004, Accepted 17 Apr 2005, Published online: 25 Jan 2007
 
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ABSTRACT

Trends in increasing aircraft speeds and engine efficiencies are increasing vehicle and engine heat loads. Especially at higher Mach numbers, fuel is an attractive heat sink. For many vehicle applications, utilization of this heat sink would increase fuel temperatures beyond critical values, typically 370–400°C (700–750°F). As temperatures increase beyond about 480°C (900°F), this heat addition can lead to thermal/catalytic cracking of the fuel, leading to an “endothermic” fuel. The principal barrier to the use of high temperature fuels is the deposition of carbonaceous material on heat exchanger passages, filters, fuel injectors, and other fuel system components. This paper will review progress in understanding and mitigating the thermal instability/deposition problem.

The author gratefully acknowledges research support by the Air Force Office of Scientific Research.

Notes

(Nowak and Gunschel, Citation1983).

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