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Numerical and experimental investigation of a gasturbine model combustor with axial swirler

Bertsch, Michael LU (2021)
Abstract
This thesis presents the simulations of and experiments with the so-called CECOST burner. The CECOST burner is a gas turbine model combustor equipped with an axial swirler and placed in a laboratory for the lean premixed turbulent combustion of a range of fuels at atmospheric pressure. The operation with natural gas, methane, hydrogen-enriched methane and syngas from black-liquor gasification was investigated experimentally and numerically. The CECOST burner is modular and adaptive, which enables the separate investigation of different parameters. A wide section of the CECOST swirler is manufactured from quartz to enable optical access. The flow field in the combustion chamber was measured by particle image velocimetry (PIV). High-speed... (More)
This thesis presents the simulations of and experiments with the so-called CECOST burner. The CECOST burner is a gas turbine model combustor equipped with an axial swirler and placed in a laboratory for the lean premixed turbulent combustion of a range of fuels at atmospheric pressure. The operation with natural gas, methane, hydrogen-enriched methane and syngas from black-liquor gasification was investigated experimentally and numerically. The CECOST burner is modular and adaptive, which enables the separate investigation of different parameters. A wide section of the CECOST swirler is manufactured from quartz to enable optical access. The flow field in the combustion chamber was measured by particle image velocimetry (PIV). High-speed imaging of the chemiluminescence signal in the bandwidth of hydroxyl radical relaxation was performed to document the intensity distribution for flames throughout the operating range of the CECOST burner. The lower (lean blow out) and upper (flashback) fuel-air equivalence ratio limits of stable operation were determined. The flashback of the flame upstream into the mixing section was captured by high-speed imaging. In the stable operating range, planar laser-induced fluorescence of hydroxyl radicals (OH-PLIF) was recorded to assess the turbulent flame structure.

Reynolds-averaged Navier-Stokes (RANS) simulations were performed to calculate the steady isothermal flow in the CECOST burner for parameter studies. The measured flow data was used to validate the geometry and numerical discretisation of the computational model of the burner. Large eddy simulation (LES) was carried out to investigate the combusting flow with temporal resolution and high accuracy. (Less)
Please use this url to cite or link to this publication:
author
supervisor
organization
publishing date
type
Thesis
publication status
published
subject
keywords
flashback, swirl, gasturbine, combustor, methane, hydrogen, LES, PLIF
ISBN
978-91-7895-735-4
978-91-7895-736-1
language
English
LU publication?
yes
id
5299a559-eefe-4119-b00c-fd3c0b34b232
date added to LUP
2021-03-07 11:20:27
date last changed
2021-03-17 11:05:36
@misc{5299a559-eefe-4119-b00c-fd3c0b34b232,
  abstract     = {This thesis presents the simulations of and experiments with the so-called CECOST burner. The CECOST burner is a gas turbine model combustor equipped with an axial swirler and placed in a laboratory for the lean premixed turbulent combustion of a range of fuels at atmospheric pressure. The operation with natural gas, methane, hydrogen-enriched methane and syngas from black-liquor gasification was investigated experimentally and numerically. The CECOST burner is modular and adaptive, which enables the separate investigation of different parameters. A wide section of the CECOST swirler is manufactured from quartz to enable optical access. The flow field in the combustion chamber was measured by particle image velocimetry (PIV). High-speed imaging of the chemiluminescence signal in the bandwidth of hydroxyl radical relaxation was performed to document the intensity distribution for flames throughout the operating range of the CECOST burner. The lower (lean blow out) and upper (flashback) fuel-air equivalence ratio limits of stable operation were determined. The flashback of the flame upstream into the mixing section was captured by high-speed imaging. In the stable operating range, planar laser-induced fluorescence of hydroxyl radicals (OH-PLIF) was recorded to assess the turbulent flame structure.<br/><br/>Reynolds-averaged Navier-Stokes (RANS) simulations were performed to calculate the steady isothermal flow in the CECOST burner for parameter studies. The measured flow data was used to validate the geometry and numerical discretisation of the computational model of the burner. Large eddy simulation (LES) was carried out to investigate the combusting flow with temporal resolution and high accuracy.},
  author       = {Bertsch, Michael},
  isbn         = {978-91-7895-735-4},
  language     = {eng},
  note         = {Licentiate Thesis},
  title        = {Numerical and experimental investigation of a gasturbine model combustor with axial swirler},
  url          = {https://lup.lub.lu.se/search/ws/files/94899448/licentiate_thesis_kappa.pdf},
  year         = {2021},
}