Modeling and simulation of charged species in lean methane-oxygen flames [Elektronische Ressource] / vorgelegt von Jens Prager

INAUGURAL - DISSERTATIONzurErlangung der Doktorwurde¨derNaturwissenschaftlich-Mathematischen Gesamtfakulta¨tderRuprecht-Karls-Universita¨tHeidelbergvorgelegt vonDiplom-Physiker Jens Pragergeboren in Frankfurt/OderTag der mu¨ndlichen Pru¨fung: 19.10.2005Title:Modeling and Simulation of Charged Species in LeanMethane-Oxygen FlamesGutachter: Prof. Dr. Dr. h.c. Jurgen Warnatz¨PD Dr. Uwe RiedelAbstractCharged species occur in all combustion systems. Chemical path-ways which involve ions are known to contribute to the formationof air pollutants like soot and aerosols. The appearance of electricalcharges, which are closely related to the combustion process itself,offers the opportunity of their use for sensing purposes in a variety ofapplications.Reliable models for the chemical reaction network and the transportprocesses are required for numerical simulations in these fields of re-search. Laminar flat flames have proven to be suitable systems forthe development and validation of chemical reaction mechanisms.In this work, the concentrations of charged species along a flat, fuel-lean,andlaminarmethane-oxygenflamearecalculatedandcomparedto experimental results. For the first time, these simulations alsoinclude negative ions. Existing software was enhanced to enable theinclusion of these ions.The chemical reaction mechanism of the charged species is compiledfrom different sources found in according literature.