Abstract

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.

Notes

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Graduation Date

2021

Semester

Summer

Advisor

Ahmed, Kareem

Degree

Master of Science in Aerospace Engineering (M.S.A.E.)

College

College of Engineering and Computer Science

Department

Mechanical and Aerospace Engineering

Degree Program

Aerospace Engineering; Thermofluid Aerodynamic Systems

Format

application/pdf

Identifier

CFE0008715;DP0025446

URL

https://purls.library.ucf.edu/go/DP0025446

Language

English

Release Date

August 2024

Length of Campus-only Access

3 years

Access Status

Masters Thesis (Campus-only Access)

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