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Turbulent Non-premixed Swirl-Stabili...

Chatterjee, Sandipan.

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Turbulent Non-premixed Swirl-Stabilized Flames of Gaseous and Liquid Fuels in a Gas Turbine Model Combustor.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Turbulent Non-premixed Swirl-Stabilized Flames of Gaseous and Liquid Fuels in a Gas Turbine Model Combustor./
作者:	Chatterjee, Sandipan.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2019,
面頁冊數:	228 p.
附註:	Source: Dissertations Abstracts International, Volume: 80-10, Section: B.
Contained By:	Dissertations Abstracts International80-10B.
標題:	Fluid mechanics. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10980242
ISBN:	9781392015667

Turbulent Non-premixed Swirl-Stabilized Flames of Gaseous and Liquid Fuels in a Gas Turbine Model Combustor.
Chatterjee, Sandipan.

Turbulent Non-premixed Swirl-Stabilized Flames of Gaseous and Liquid Fuels in a Gas Turbine Model Combustor. - Ann Arbor : ProQuest Dissertations & Theses, 2019 - 228 p.

Source: Dissertations Abstracts International, Volume: 80-10, Section: B.

Thesis (Ph.D.)--University of Toronto (Canada), 2019.

This item must not be sold to any third party vendors.

Turbulent non-premixed swirl-stabilized flames of gaseous and liquid fuels were investigated experimentally in an optically-accessible gas turbine model combustor. Propane/air and ethylene/air flames were operated at three global fuel-air equivalence ratios. Spray flames of liquid n-heptane fuel were stabilized at six global fuel-air equivalence ratios. The velocity, reaction zone structure and soot measurements were performed using stereoscopic particle image velocimetry, planar laser induced fluorescence of OH radicals and laser induced incandescence, respectively. In all the experimented test flow cases, the time-averaged velocity data show the presence of two large recirculation zones, separated by a zone of high velocity swirled inflow. The inner recirculation zone, which surrounds the combustor axis, shows high turbulence intensities. In gaseous fuel flames, the inner recirculation zone also contained most of the combustion-generated soot concentration of the flow field of gaseous fuel flames. The flow field regions exterior to the inner recirculation zone showed negligible soot values mainly due to the soot oxidation caused by the high intensity turbulence as well as strong OH intensity near the recirculation zone boundary. The time-averaged soot values showed strong sensitivity to changes in the air flow rates. The changes in the air flow rate mostly increased the soot intermittency, while the instantaneous soot concentrations stayed nearly constant. Intensified turbulence as well as shortening of flow time for soot chemistry are speculated to be the reasons for the high sensitivity of soot values to air flow rates. Further, in n-heptane/air flames, the velocity data showed a region of high velocity fuel droplets, positioned in-between two large recirculation zones. The boundary of the inner recirculation zones showed the heat release events, thereby leading to high OH counts. The OH fluorescence profiles showed the major role played by the recirculation zones in fuel droplet evaporation, forming the evaporated fuel-air reactant mixture, and subsequently, igniting the reactant mixture in the presence of hot combustion products and active radicals.

ISBN: 9781392015667Subjects--Topical Terms:

528155
Fluid mechanics.

Turbulent Non-premixed Swirl-Stabilized Flames of Gaseous and Liquid Fuels in a Gas Turbine Model Combustor.
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520 $a Turbulent non-premixed swirl-stabilized flames of gaseous and liquid fuels were investigated experimentally in an optically-accessible gas turbine model combustor. Propane/air and ethylene/air flames were operated at three global fuel-air equivalence ratios. Spray flames of liquid n-heptane fuel were stabilized at six global fuel-air equivalence ratios. The velocity, reaction zone structure and soot measurements were performed using stereoscopic particle image velocimetry, planar laser induced fluorescence of OH radicals and laser induced incandescence, respectively. In all the experimented test flow cases, the time-averaged velocity data show the presence of two large recirculation zones, separated by a zone of high velocity swirled inflow. The inner recirculation zone, which surrounds the combustor axis, shows high turbulence intensities. In gaseous fuel flames, the inner recirculation zone also contained most of the combustion-generated soot concentration of the flow field of gaseous fuel flames. The flow field regions exterior to the inner recirculation zone showed negligible soot values mainly due to the soot oxidation caused by the high intensity turbulence as well as strong OH intensity near the recirculation zone boundary. The time-averaged soot values showed strong sensitivity to changes in the air flow rates. The changes in the air flow rate mostly increased the soot intermittency, while the instantaneous soot concentrations stayed nearly constant. Intensified turbulence as well as shortening of flow time for soot chemistry are speculated to be the reasons for the high sensitivity of soot values to air flow rates. Further, in n-heptane/air flames, the velocity data showed a region of high velocity fuel droplets, positioned in-between two large recirculation zones. The boundary of the inner recirculation zones showed the heat release events, thereby leading to high OH counts. The OH fluorescence profiles showed the major role played by the recirculation zones in fuel droplet evaporation, forming the evaporated fuel-air reactant mixture, and subsequently, igniting the reactant mixture in the presence of hot combustion products and active radicals.
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