Investigation on flashback propensity of fuel blends: Composition effect

Rogelio Franco, University of Texas at El Paso

Abstract

An experimental investigation is presented to delineate the effects of composition and external excitation on the flashback propensity of hydrocarbon (CH4-C3H8 and CH4-C2H 6) and hydrogen (CO-H2 and CH4-H2) fuel blends. The flashback propensity of hydrocarbon fuel blends generally correlates with the flame velocity and stoichiometry of the fuel mixtures. The flashback propensity of hydrocarbon fuel blends is susceptible to the presence of external excitation. Flashback occurs at much leaner conditions in acoustically forced flames. The flashback characteristics of hydrogen fuel blends are generally dominated by the kinetics of the hydrogen. The effects of external excitation on the flashback propensity of CO-H2 flames with more than 5% H2 are not significant. For 0-700Hz forcing range the kinetic time scale of H2 is prevalent over the external forcing time scale. ^

Subject Area

Engineering, Chemical|Engineering, Mechanical|Engineering, Petroleum

Recommended Citation

Franco, Rogelio, "Investigation on flashback propensity of fuel blends: Composition effect" (2005). ETD Collection for University of Texas, El Paso. AAI1434070.
http://digitalcommons.utep.edu/dissertations/AAI1434070

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