Optical Diagnostics within GenDies a brief technology overview

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Optical Diagnosticswithin GenDiesa brief
technology overview

• Mattias Richter
• Div. of Combustion Physics

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Simultaneous detection of formaldehyde and OH

• Formaldehyde
• Excitation at 355nm
• Detection gt400nm
• OH
• Excitation at 283nm
• Detection at 308 nm
• Delay between the two lasers 500ns(0.004 CAD _at_
  1200 rpm)

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Experimental setup
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Image processing
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Formaldehyde and OHdistributions for SOI 80 CAD
BTDC(HCCI)
Digitalized data
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Partially oxidized fuel (POF) and OH
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Simultaneous OH luminescence and natural
luminescence using a stereoscope
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Luminescence collected trough a spectrometer
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Two-color pyrometry

Small injection nozzle Large injection
nozzle