scholarly journals A multi-chamber model of combustion instabilities and its assessment using kilohertz laser diagnostics in a gas turbine model combustor

2016 ◽  
Vol 174 ◽  
pp. 120-137 ◽  
Author(s):  
YunTao Chen ◽  
James F. Driscoll
Keyword(s):  
Gas Turbine ◽  
Laser Diagnostics ◽  
Combustion Instabilities ◽  
Chamber Model ◽  
Turbine Model

scholarly journals High-speed laser diagnostics for the study of flame dynamics in a lean premixed gas turbine model combustor

2010 ◽  
Vol 52 (3) ◽  
pp. 555-567 ◽  
Author(s):  
Isaac Boxx ◽  
Christoph M. Arndt ◽  
Campbell D. Carter ◽  
Wolfgang Meier
Keyword(s):  
Gas Turbine ◽  
High Speed ◽  
Laser Diagnostics ◽  
Flame Dynamics ◽  
Lean Premixed ◽  
Turbine Model

Experimental Analysis of Soot Formation and Oxidation in a Gas Turbine Model Combustor Using Laser Diagnostics

2011 ◽  
Vol 133 (12) ◽  
Author(s):  
Klaus Peter Geigle ◽  
Jochen Zerbs ◽  
Markus Köhler ◽  
Michael Stöhr ◽  
Wolfgang Meier
Keyword(s):  
Gas Turbine ◽  
Soot Formation ◽  
Laser Diagnostics ◽  
Stereoscopic Particle Image Velocimetry ◽  
Data Set ◽  
Laser Induced Incandescence ◽  
Partially Premixed Flame ◽  
Secondary Air ◽  
Anti Stokes ◽  
Turbine Model

Sooting ethylene/air flames were investigated experimentally in a dual swirl gas turbine model combustor with good optical access at atmospheric pressure. The goals of the investigations were a detailed characterization of the soot formation and oxidation processes under gas turbine relevant conditions and the establishment of a data base for the validation of numerical combustion simulations. The flow field was measured by stereoscopic particle image velocimetry, the soot volume fractions by laser-induced incandescence, the heat release by OH chemiluminescence imaging and the temperatures by coherent anti-Stokes Raman scattering. Two flames are compared: a fuel-rich partially premixed flame with moderate soot concentrations and a second one with the same parameters but additional injection of secondary air. Instantaneous as well as average distributions of the measured quantities are presented and discussed. The measured soot distributions exhibit a high temporal and spatial dynamic. This behavior correlates with broad temperature probability density functions. With injection of secondary air downstream of the flame zone the distributions change drastically. The data set, including PDFs of soot concentration, temperature and flow velocity, is unique in combining different laser diagnostics with a combustor exhibiting a more challenging geometry than existing validation experiments.

An Investigation of the Effects of Fuel Staging on Flame Structure in a Gas Turbine Model Combustor

2013 ◽  
Author(s):  
J. D. Gounder ◽  
I. Boxx ◽  
P. Kutne ◽  
F. Biagioli ◽  
H. Luebcke
Keyword(s):  
Gas Turbine ◽  
High Speed ◽  
Equivalence Ratio ◽  
Fuel Injection ◽  
Laser Diagnostics ◽  
Thermal Power ◽  
Flame Structure ◽  
Operating Conditions ◽  
Fuel Staging ◽  
Turbine Model

Gas turbine (GT) flames at lean operating conditions are susceptible to instabilities that can lead to unsteady operation, flame extinction, and thermoacoustic oscillations. High speed (10 kHz) laser and optical diagnostic techniques have been used to investigate the effect of fuel staging on the mechanisms involved in such instabilities and the overall performance of a gas turbine model combustor. The GT burner used in this study consists of coaxial swirlers which allow for fuel staging capability, where the fuel is varied from 100% to 20% fuel injection in the inner swirler. The burner is equipped with a combustion chamber with large quartz windows, allowing for the application of optical and laser diagnostics. Simultaneous high speed OH Planar Laser Induced Fluorescence (PLIF) and OH* chemiluminescence (CL) imaging, exhaust gas sampling and acoustic measurements were applied to characterize the flames and determine the operability limits of the combustor. Methane air flames at atmospheric pressure have been investigated at a constant thermal power of 58 kW. The global equivalence ratio was kept constant, while the fuel staging was varied. The bulk flow velocity at the exit plane was kept constant at 20 m/s. Simultaneous high speed particle image velocity (PIV) and OH PLIF measurements were performed at a repetition rate of 10 kHz on specifically chosen flames with a fixed staging and equivalence ratio. This paper will present the flame and the flow field structure resolved using the kHz measurement technique. The interaction between the velocity field and the flame front marked by the OH LIF will be presented. The mean PIV image provides the location of the inner and outer recirculation zones. The flame structure presented in this paper will also show the effectiveness of fuel mixing as the staging is varied. The changes in flame shape with variation in fuel staging is determined using the OH* chemiluminescence images. As the fuel flow in the inner swirler is reduced, the NOx and CO emissions also reduce and reach a minimum at a staging of 45% fuel being injected in the inner swirler. As fuel injection in the outer swirler increases beyond 60% the NOx and CO emissions start also increasing.

Experimental Analysis of Soot Formation and Oxidation in a Gas Turbine Model Combustor Using Laser Diagnostics

2011 ◽  
Author(s):  
Klaus Peter Geigle ◽  
Jochen Zerbs ◽  
Markus Ko¨hler ◽  
Michael Sto¨hr ◽  
Wolfgang Meier
Keyword(s):  
Gas Turbine ◽  
Soot Formation ◽  
Laser Diagnostics ◽  
Stereoscopic Particle Image Velocimetry ◽  
Data Set ◽  
Laser Induced Incandescence ◽  
Partially Premixed Flame ◽  
Secondary Air ◽  
Anti Stokes ◽  
Turbine Model

Sooting ethylene/air flames were investigated experimentally in a dual swirl gas turbine model combustor with good optical access at atmospheric pressure. The goals of the investigations were a detailed characterization of the soot formation and oxidation processes under gas turbine relevant conditions and the establishment of a data base for the validation of numerical combustion simulations. The flow field was measured by stereoscopic particle image velocimetry, the soot volume fractions by laser-induced incandescence, the heat release by OH chemiluminescence imaging and the temperatures by coherent anti-Stokes Raman scattering. Two flames are compared: a fuel-rich partially premixed flame with moderate soot concentrations and a second one with the same parameters but additional injection of secondary air. Instantaneous as well as average distributions of the measured quantities are presented and discussed. The measured soot distributions exhibit a high temporal and spatial dynamic. This behaviour correlates with broad temperature probability density functions. With injection of secondary air downstream of the flame zone the distributions change drastically. The data set, including PDFs of soot concentration, temperature and flow velocity, is unique in combining different laser diagnostics with a combustor exhibiting a more challenging geometry than existing validation experiments.

scholarly journals Influence of Single-Component Fuels on Gas-Turbine Model Combustor Lean Blowout

2018 ◽  
Vol 34 (1) ◽  
pp. 97-107 ◽  
Author(s):  
J. Grohmann ◽  
B. Rauch ◽  
T. Kathrotia ◽  
W. Meier ◽  
M. Aigner
Keyword(s):  
Gas Turbine ◽  
Single Component ◽  
Lean Blowout ◽  
Turbine Model

scholarly journals Dynamics of lean blowout of a swirl-stabilized flame in a gas turbine model combustor

2011 ◽  
Vol 33 (2) ◽  
pp. 2953-2960 ◽  
Author(s):  
M. Stöhr ◽  
I. Boxx ◽  
C. Carter ◽  
W. Meier
Keyword(s):  
Gas Turbine ◽  
Lean Blowout ◽  
Turbine Model
Sign in / Sign up

Export Citation Format

Share Document