Planar laser-induced fluorescence (PLIF) is a spectroscopic diagnostic method used widely in combustion research. In this study, imaging with formaldehyde as the tracer species was used in the diagnosis of jet engine performance at the UCF Propulsion and Energy Research Laboratory (PERL). PLIF imaging was first conducted on a laboratory Bunsen burner in order to validate the technique, identify the individual correction components, and demonstrate the results are consistent with other turbulent freejet formaldehyde PLIF literature. Once validated, PLIF imaging was then used to examine the concentration of formaldehyde in the reacting jet of a high pressure axially staged combustor. The results were processed to convert from recorded fluorescence to quantitative concentration profiles. This allowed for simultaneous visualization of the flame structure and the spatial distribution of formaldehyde vapor concentration in the reacting jet in crossflow for different equivalence ratios. Additionally, our concentration distributions in the instantaneous cross-sectional images showed regions of higher formaldehyde fluorescence near the preheat zone, and moderate formaldehyde fluorescence in the region preceding the preheat zone. Recommendations were made for improvements to the procedures used in this study for future work. Preliminary work was also done for the future integration of hydroxyl (OH) PLIF to be used simultaneously with formaldehyde PLIF for even more in-depth performance analysis.
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Master of Science in Aerospace Engineering (M.S.A.E.)
College of Engineering and Computer Science
Mechanical and Aerospace Engineering
Aerospace Engineering; Thermofluid Aerodynamic Systems
Length of Campus-only Access
Masters Thesis (Campus-only Access)
Quiroga, Jason, "Planar Laser-Induced Fluorescence of Formaldehyde in the Reacting Jet of a High Pressure Axially Staged Combustor" (2021). Electronic Theses and Dissertations, 2020-. 744.