Authors: W. Swain, Y. Wang, P. Parajuli, M. Hay, A. Saylam, T. Dreier, C. Schulz, and W. Kulatilaka
Document type: Published research article
Journal: Experiments in Fluids
Year: 2023
Volume: 64
Article number: 71
DOI: 10.1007/s00348-023-03611-0
This study characterizes a laboratory-scale, optically accessible high-pressure burner facility for premixed methane/air flames. The facility is designed to support combustion diagnostics under elevated-pressure conditions relevant to gas-turbine combustion research.
The burner was investigated using high-speed hydroxyl and methylidyne chemiluminescence imaging, OH laser-induced fluorescence imaging, and two-color OH-LIF thermometry. For OH-LIF and thermometry measurements, the flames were stabilized up to 10 bar using a stainless-steel disk positioned above the burner surface.
The OH-LIF measurements showed a linear dependence of the signal on laser energy within the investigated range. Increasing pressure from 1 to 10 bar produced a nonlinear decrease in OH-LIF signal intensity. Quenching corrections explained part of this signal reduction, while additional effects such as laser absorption and signal trapping need to be considered for full signal quantification.
The measured excitation spectra agreed well with LIFBASE predictions, and equivalence-ratio scans at different pressures were consistent with Cantera equilibrium calculations. Two-dimensional OH-concentration fields and OH-LIF temperature maps were also compared qualitatively with ANSYS Fluent flame simulations.
The characterized high-pressure flame facility provides a useful testbed for combustion diagnostics, soot formation studies, and investigations of minor species behavior at elevated pressures.
PDF: high-pressure-flame-facility-diagnostics.pdf
Swain, W., Wang, Y., Parajuli, P., Hay, M., Saylam, A., Dreier, T., Schulz, C., & Kulatilaka, W. (2023). Characterization of a high-pressure flame facility using high-speed chemiluminescence and OH LIF imaging. Experiments in Fluids, 64, 71. https://doi.org/10.1007/s00348-023-03611-0