NUMERICAL SIMULATION OF THE BLUE WHIRL: A REACTING VORTEX BREAKDOWN PHENOMENON

dc.contributor.advisorOran, Elaine Sen_US
dc.contributor.authorChung, Joseph Dong ilen_US
dc.contributor.departmentAerospace Engineeringen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.date.accessioned2020-07-10T05:31:19Z
dc.date.available2020-07-10T05:31:19Z
dc.date.issued2019en_US
dc.description.abstractThe blue whirl is a small, stable, spinning blue flame that evolved spontaneously in recent laboratory experiments while studying turbulent, sooty fire whirls. It burns a range of different liquid hydrocarbon fuels cleanly with no soot production, presenting a new potential way for low-emission combustion. This thesis uses numerical simulations to present, for the first time, the flame and flow structure of the blue whirl. These simulations show that the blue whirl is composed of three different flames - a diffusion flame and a premixed rich and lean flame - all of which meet in a fourth structure, a triple flame which appears as a whirling blue ring. The results also show that the flow structure emerges as the result of vortex breakdown, a fluid instability which occurs in swirling flows. This thesis also presents the development and testing of the numerical algorithms used in the simulation of the blue whirl. This work is a critical step forward in understanding how to use this new form of clean combustion.en_US
dc.identifierhttps://doi.org/10.13016/pbdx-ww65
dc.identifier.urihttp://hdl.handle.net/1903/26174
dc.language.isoenen_US
dc.subject.pqcontrolledComputational physicsen_US
dc.subject.pqcontrolledEngineeringen_US
dc.subject.pqcontrolledFluid mechanicsen_US
dc.subject.pquncontrolledBlue Whirlen_US
dc.subject.pquncontrolledCombustionen_US
dc.subject.pquncontrolledComputational Fluid Dynamicsen_US
dc.subject.pquncontrolledFire Whirlen_US
dc.subject.pquncontrolledReactive Vortex Breakdownen_US
dc.subject.pquncontrolledTriple Flameen_US
dc.titleNUMERICAL SIMULATION OF THE BLUE WHIRL: A REACTING VORTEX BREAKDOWN PHENOMENONen_US
dc.typeDissertationen_US

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