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High-speed imaging (LIF and PIV)
(species and velocity distributions with frame rates in the kilohertz range)



 
 
 Gas turbine model combustor for swirled methane/air flames. The flame is confinded by four quartz plates which enable good optical access for laser measurements.
zum Bild Gas turbine model combustor for swirled methane/air flames. The flame is confinded by four quartz plates which enable good optical access for laser measurements.

Whereas conventional 2D laser measurement systems operate with frame rates of around 10 Hz, frame rates of typically 10000 Hz can be achieved with novel laser systems based on diode-pumped solid-state lasers or disk lasers in combination with CMOS cameras. Such kilohertz measurement systems are applied at the Institute for measurements using laser-induced fluorescence and particle image velocimetry. The main focus is on investigating transient combustion processes such as ignition and flame extinction or, more generally, the interaction between flames and flow field [1-6]. High frame rates allow a precise temporal tracking of the processes, thus enabling the causes of such combustion phenomena to be identified.

  1. "Sustained multi-kHz flamefront and 3-component velocity-field measurements for the study of turbulent flames"
    I. Boxx, M. Stöhr, C. Carter, W. Meier
    Appl. Phys. B 95, 23-29 (2009)
  2. "Temporally resolved planar measurements of transient phenomena in a partially pre-mixed swirl flame in a gas turbine model combustor"
    I. Boxx, M. Stöhr, C. Carter, W. Meier
    Combust. Flame 157, 1510-1525 (2010)
  3. "Laser-based investigations in gas turbine model combustors"
    W. Meier, I. Boxx, M. Stöhr, C.D. Carter
    Exp. Fluids 49, 865-882 (2010)
  4. "Flow-flame interactions causing acoustically coupled heat release fluctuations in a thermo-acoustically unstable gas turbine model combustor"
    A.M. Steinberg, I. Boxx, M. Stöhr, C.D. Carter, W. Meier
    Combust. Flame 157, 2250-2266 (2010)
  5. “Experimental study of vortex-flame interaction in a swirl combustor”
    M. Stöhr, I. Boxx, C.D. Carter, R. Sadanandan, W. Meier
    Combust. Flame 159, 2636-2649 (2012)
  6. “Auto-Ignition and Flame Stabilization of Pulsed Methane Jets in a Hot Vitiated Coflow Studied with High-Speed Laser and Imaging Techniques“
    C.M. Arndt, J.D. Gounder, W. Meier, M. Aigner
    Appl. Phys. B 108, 407-417 (2012)
 Sequence of 6 simultaneous stereo PIV and OH LIF light-sheet measurements from a swirled methane/air flame recorded with a frame rate of 5 kHz.
zum Bild Sequence of 6 simultaneous stereo PIV and OH LIF light-sheet measurements from a swirled methane/air flame recorded with a frame rate of 5 kHz.

 

 


Related Articles
Rayleigh Scattering
Raman Scattering
CARS
Absorption Spectroscopy
LIF
LII
PIV
Simultaneous Use
High-speed Imaging
LIPS
Phosphor Thermometry
Research Fields
Development of methods
Sooting flames
Thermoacoustics
Alternative fuels
Standard flames
Gas turbine combustion
Applications
Equipment
Related Topics
Atomic and Molecular Physics
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