Highspeed video campaign 2006 trucksized engine

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High-speed video campaign 2006 (truck-sized
engine)
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OH luminescence and simultaneous OH and natural
luminescence using a stereoscope
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High-speed video system combined with a
spectrometer
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Two-color pyrometry

Small injection nozzle Large injection
nozzle
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Two-color pyrometry
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Technology development

• Simultaneous LIF of formaldehyde and OH
• Formaldehyde as naturally occurring fuel tracer
• Filtered Rayleigh Scattering
• Thermographic Phosphors
• (the majority of the needed development work has
  been performed within other related research
  programs)

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Simultaneous LIF of formaldehyde and OH
Formaldehyde is used a marker of areas with low
temperature reactions and OH is used as a marker
of areas with high temperature combustion.
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Formaldehyde as naturally occurring fuel tracer
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Formaldehyde as naturally occurring fuel tracer
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Filtered Rayleigh Scattering
Preliminary result from using filtered Rayleigh
for fuel visualization without the need of adding
a tracer. In this example the charge in the right
part of the image is reacting.
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Thermographic Phosphors

• Remote optical probing of surface temperatures
• The surface is coated with at thin layer of a
  thermographic phosphor material
• The surface temperature can be retrieved in two
  ways
• I) decay time of the emitted light
• II) intensity ratio between two different
  wavelength regions

The surface temperature has been monitored during
the entire compression-combustion-expansion
event. Each measurement point correspond to the
average value of about 150 single shot
measurements.