Laser setup for simultaneous T-PIV, OH PLIF, and CH2O PLIF.
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Laser DiagnosticsThe Experimental
Engines Lab is an internationally recognized leader in the field of
high-repetition-rate (multi-kHz) laser and optical measurement
techniques for flow and combustion. Typical fluid mechanical time
scales in systems of interest range from microseconds to milliseconds.
Hence, unlike traditional diagnostics that operate at around 10 Hz and
capture statistically uncorrelated snap-shots, multi-kHz techniques are
able to reveal causal mechanisms.
Key measurement achievements by Experimental Engines Lab personnel include 1) multi-kHz multi-plane stereoscopic particle image velocimetry (S-PIV) and OH planar laser induced fluorescence (PLIF) measurements for studying turbulent combustion dynamics; 2) multi-kHz combined S-PIV/PLIF measurements in gas turbine relevant flows; 3) multi-kHz tomographic PIV (T-PIV) measurements in flames; 4) multi-kHz combined T-PIV/CH2O PLIF/OH PLIF measurements. In each case, our work represents either the first or very early results in these areas. Current collaborators on this topic include the German Aerospace Center, US Air Force Research Laboratory, and Sandia National Laboratory. |