Flame front imaging and ignition performance of ultra-compact trapped-vortex combustor
Yoon, Joshua
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https://hdl.handle.net/2142/132697
Description
Title
Flame front imaging and ignition performance of ultra-compact trapped-vortex combustor
Author(s)
Yoon, Joshua
Issue Date
2025-12-08
Director of Research (if dissertation) or Advisor (if thesis)
Lee, Tonghun
Department of Study
Mechanical Sci & Engineering
Discipline
Mechanical Engineering
Degree Granting Institution
University of Illinois Urbana-Champaign
Degree Name
M.S.
Degree Level
Thesis
Keyword(s)
Flame Dynamics, Compact Combustor, Flame Imaging
Abstract
In this study, the flame dynamics and ignition performance of a novel ultra-compact trapped-vortex combustor, the ARC-S1, is investigated. Time-averaged OH* chemiluminescence was used to visualize flame anchoring and distribution inside the combustor. High-speed OH* PLIF imaging was conducted at two spanwise locations along the combustor cavity at 1∼3 atm, revealing an axial shift in flame distribution along the cavity vortex as pressures increased. The ignition performance of the ARC-S1 was investigated at atmospheric pressure, with air injection temperatures of 25° and 10°C, using a conventional spark igniter and an experimental plasma igniter. At lean operating conditions, plasma ignition exhibited up to a 45% reduction in Eign, although negligible improvements were observed from nominal to rich operating conditions.
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