Title:
Flow Field Measurements in a Counter-Swirl Stabilized Liquid Combustor

dc.contributor.advisor Menon, Suresh
dc.contributor.author Colby, Jonathan A. en_US
dc.contributor.committeeMember Jagoda, Jechiel I.
dc.contributor.committeeMember Seitzman, Jerry M.
dc.contributor.department Aerospace Engineering en_US
dc.date.accessioned 2006-06-09T18:04:08Z
dc.date.available 2006-06-09T18:04:08Z
dc.date.issued 2006-03-27 en_US
dc.description.abstract To adhere to the current requirements for NOx and CO emissions in combustion systems, modern land and air based gas turbine engines often operate in the fuel lean regime. While operating near the lean blow out (LBO) limit does reduce some harmful emissions, combustor stability is sacrificed and extinction becomes a major concern. To fully understand the characteristics of lean operation, an experimental study was conducted to map the time averaged flow field in a typical industrial, counter-swirling, liquid fuel combustor. This study examined two steady-state operating conditions, both near the lean extinction limit for this swirl burner. Using an LDV/PDPA system, 2-D mean and fluctuating velocities, as well as Reynolds stresses, were measured throughout the combustor. These measurements were taken for both the non-reacting and reacting flow fields, enabling a direct analysis of the result of heat addition and increased load on a turbulent swirling flow field. To further understand the overall flow field, liquid droplet diameter measurements were taken to determine the fuel spray characteristics as a function of operating pressure and rated spray angle. Chemical composition at the combustor exit was also measured, with an emphasis on the concentrations of both CO and NOx emissions. This large database of aerodynamic and droplet measurements improves understanding of the swirling, reacting flow field and aids in the accurate prediction of lean blow-out events. With this understanding of the lean blow-out limit, increased fuel efficiency and decreased pollutant emissions can be achieved in industrial combustors, especially those used for thrust in the airline industry. en_US
dc.description.degree M.S. en_US
dc.format.extent 1195952 bytes
dc.format.mimetype application/pdf
dc.identifier.uri http://hdl.handle.net/1853/10470
dc.language.iso en_US
dc.publisher Georgia Institute of Technology en_US
dc.subject Lean operation en_US
dc.subject Swirl-stabilization
dc.subject Spray combustion
dc.title Flow Field Measurements in a Counter-Swirl Stabilized Liquid Combustor en_US
dc.type Text
dc.type.genre Thesis
dspace.entity.type Publication
local.contributor.advisor Menon, Suresh
local.contributor.corporatename College of Engineering
local.contributor.corporatename Daniel Guggenheim School of Aerospace Engineering
local.relation.ispartofseries Master of Science in Aerospace Engineering
local.relation.ispartofseries Master of Science in Aerospace Engineering
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