Degree

Doctor of Philosophy (PhD)

Department

Mechanical and Industrial Engineering

Document Type

Dissertation

Abstract

The interaction of the paramagnetic species in a combustion process with the mag- netic field placed in the vicinity of non-premixed flames affects the characteristics of the non-premixed flames - flame height and flame lift-off height. However, the effect of this magnetic interaction on the pollutants generated by the flame is unknown.

In general, pollutant formation is promoted in most combustion systems due to in- complete combustion of the hydrocarbon due to improper mixing. Since paramagnetic combustion species such as O2, O, OH, etc interacts with magnetic fields and possess a preferential motion direction, imposing magnetic field on non-premixed flames has a potential of improving the mixing characteristics of the combustion process.

To study the effect of magnetic fields on the pollutants of non-premixed flames, a computational study is conducted on an axisymmetric co-flow laminar propane – air non-premixed flame computed with a detailed gas phase mechanism. The pollutants of interests are soot and CO. Moreover, the formation of soot is modeled using the Moss- Brooks model with some modified parameters.

Based on the computed results, the effects of the imposed magnetic fields on the pol- lutants (soot and CO) depend on the magnitude of the magnetic field gradient imposed on the flame.

Date

5-5-2021

Committee Chair

Schoegl, Ingmar M.

Available for download on Tuesday, May 03, 2022

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