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SUMMARY:Laser based reactive flow sensing - Dr Johan Hult\, Department of 
 Chemical Engineering
DTSTART:20070320T115500Z
DTEND:20070320T122000Z
UID:TALK6801@talks.cam.ac.uk
CONTACT:Liam Garvey
DESCRIPTION:Recent developments in the application of novel light sources 
 to reactive flow sensing will be presented. Laser based sensors can be use
 d for in-situ probing of hostile environments\, such as the high temperatu
 re reactive gases found inside a jet flame. Ideally\, such a sensor combin
 es a wide spectral coverage with a high wavelength tuning rate\, thus allo
 wing simultaneous monitoring of multiple species at rates matching the tur
 bulent flow scales. A newly developed supercontinuum sensor offers such ca
 pabilities\, as it is capable of sweeping over a several hundred nanometre
  wide wavelength range at MHz rates. For certain applications it is furthe
 rmore necessary to resolve the spatial scales of the flow\, which requires
  the use of fluorescence based techniques. This has traditionally required
  pulsed high-power lasers\, but we have recently demonstrated that compact
  GaN diode lasers can equally well be employed for such measurements.
LOCATION:Kaetsu Centre\, New Hall
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