0
TECHNICAL PAPERS: Gas Turbines: Combustion and Fuels

Observations of Flame Behavior in a Laboratory-Scale Premixed Natural Gas/Air Gas Turbine Combustor From Planar Laser Induced Fluorescence Measurements of OH, Laser Doppler Anemometer Velocity Measurements, and Coherent Anti-Stokes Roman Spectrometer Temperature Measurements

[+] Author and Article Information
Paul O. Hedman, Thomas H. Fletcher, Daniel V. Flores, Stewart G. Graham, Jason K. Haslam, Robert L. Murray, G. Wayne Timothy

Department of Chemical Engineering and Advanced Combustion Engineering Research Center, Brigham Young University, Provo, UT 84602

J. Eng. Gas Turbines Power 127(4), 724-739 (May 05, 2004) (16 pages) doi:10.1115/1.1914804 History: Received July 30, 2003; Revised May 05, 2004

Instantaneous planar laser induced fluorescence (PLIF) images of OH, simultaneous axial/radial and axial/tangential velocity measurements with an LDA (laser Doppler anemometer), and instantaneous gas temperature measurements using a coherent anti-Stokes Raman spectrometer (CARS) were obtained in a pre-mixed, swirl-stabilized laboratory-scale combustor, fired with natural gas. Four operating conditions were examined (two swirl conditions and equivalence ratios of 0.80 and 0.65). The instantaneous PLIF images of OH illustrate the chaotic nature of the turbulent flame eddies. Mean and standard deviations of each variable were measured at different locations in the flame, along with probability density functions. Stability of the flame at each condition is related to measurements in the central and side recirculation zones.

Copyright © 2005 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

Schematic of premixed combustor (adapted from Schmidt and Hedman (11))

Grahic Jump Location
Figure 2

Schematic of premixed injector and medium and high swirl block inserts (adapted from Schmidt and Hedman (11))

Grahic Jump Location
Figure 3

Flow patterns in a confined, bluff-base, premixed, swirl-stabilized combustor (adapted from Gupta (13))

Grahic Jump Location
Figure 4

Example video image of premixed natural gas/air flame (MS burner, 500-slpm air flow rate, ϕ=1.0)

Grahic Jump Location
Figure 5

Instantaneous PLIF OH images of flame structure

Grahic Jump Location
Figure 6

Mean PLIF images of OH in the ATS burner (premixed natural gas/air, air flow=500slpm)

Grahic Jump Location
Figure 7

Standard deviation PLIF images of OH in the ATS burner (premixed natural gas/air, air flow=500slpm)

Grahic Jump Location
Figure 8

Example PDFs from OH-PLIF images (HS injector, ϕ=0.80)

Grahic Jump Location
Figure 9

Example PDFs from OH-PLIF images (MS injector, ϕ=0.65)

Grahic Jump Location
Figure 10

Iso-contour maps of mean axial, radial, and tangential velocity (HS injector, ϕ=0.80)

Grahic Jump Location
Figure 11

Iso-contour maps of mean axial, radial, and tangential velocity (MS injector, ϕ=0.65)

Grahic Jump Location
Figure 12

Iso-contour maps of standard deviations of axial, radial, and tangential velocity (HS injector, ϕ=0.80)

Grahic Jump Location
Figure 13

Iso-contour maps of standard deviations of axial, radial, and tangential velocity (HS injector, ϕ=0.65)

Grahic Jump Location
Figure 14

Mean axial velocity contour map and example velocity PDFs (HS injector, ϕ=0.80)

Grahic Jump Location
Figure 15

Mean axial velocity contour map and example PDFs (MS injector, ϕ=0.65)

Grahic Jump Location
Figure 16

Volumetric flow rates in the central recirculation zone, computed from axial velocities

Grahic Jump Location
Figure 17

Volumetric flow rates in the side recirculation zone, computed from axial velocities

Grahic Jump Location
Figure 18

Contour maps of mean gas temperatures for the four test conditions

Grahic Jump Location
Figure 19

Contour maps of normalized σ∕T% for the four test conditions

Grahic Jump Location
Figure 20

Mean gas temperature contour map and example temperature PDFs (HS injector, ϕ=0.80)

Grahic Jump Location
Figure 21

Mean gas temperature contour map and example temperature PDFs (HS injector, ϕ=0.65)

Grahic Jump Location
Figure 22

Location of the bimodal distribution PDFs for all combustion cases, as indicated by horizontal lines

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In