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Optical diagnostics • Line-of-sight measurements of soot and temperature

Our laboratory facilities combine custom experimental facilities with state-of-the-art measurement methods. Optical diagnostics • Line-of-sight measurements of soot and temperature • Infrared scattering for optically thick systems • Raman spectroscopy

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Optical diagnostics • Line-of-sight measurements of soot and temperature

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  1. Our laboratory facilities combine custom experimental facilities with state-of-the-art measurement methods Optical diagnostics • Line-of-sight measurements of soot and temperature • Infrared scattering for optically thick systems • Raman spectroscopy • Infrared emission spectroscopy • Laser-induced fluorescence • Ballistic Imaging Particle and droplet characterization • Laser scattering and extinction Sampling • Gas chromatography • Mass spectrometry • FTIR spectroscopy Facilities • Power plant simulator for instrumentation development • High pressure diesel combustion simulator • Numerous burners

  2. We have developed a new optically based power-plant NO emission monitor System field test in power plant Boiler door and periscope Laboratory power- plant simulator CSM developed Fabry-Perot interferometer Faculty: Parker

  3. Infrared-capable fibers allow high-speed monitoring of post-combustion flows Objectives • Monitor temperature, and concentrations of CO, CO2, and H2O Radiant Emission Sensors •Data analysis requires spectroscopic modeling of the flow constituents Results illustrate unstable burner operation Testing using a methane- fired diffusion flame Faculty: Parker

  4. AOTF Non-intrusive measurements of power plant flows are improved with an AOTF • H2O, CO2, CO and Temperature are determined based on system radiance and comparison with the known radiative properties of molecules. • Wavelength selection uses an Acousto Optical Tunable Filter (AOTF) coupled to the fiber optic system • Results indicate Temperature and H2O are easily determined to better than 10% accuracy • CO2 and CO require improved spectroscopic modeling Custom Burner for testing Investigator: Parker, Engineering

  5. Diesel combustion simulations have shown a “new” pathway for Nitric Oxide emission control • CSM has developed a unique testing capability for diesel combustion fundamentals • Results show that Nitric Oxide is destroyed “in-cylinder” Diesel Simulator Experimental Results • Physical mechanism is re-entrainment of combustion products into the spray and high temperature chemistry within the spray Investigator: Parker, Engineering

  6. System results are from a combusting diesel spray System relies on simultaneous emission and extinction from soot Results show time resolved line-integrated can be produced Measurements of soot column density are also produced Soot is a target emitter that can beused to monitor system temperature Investigator: Parker, Engineering

  7. Laser diagnostics have been developed to monitor droplet processes in a diesel spray Typical Diesel Spray • CSM has developed measurement methods that allow monitoring of droplet sizes and volume fractions in a combusting diesel spray • Other current methods are incapable of making this measurement • Results show that droplets are much smaller than expected and must be produced by liquid turbulence at the injector outlet Experimental Droplet Diameter movie, 0.1 msec per frame Investigator: Parker, Engineering

  8. Flame synthesis of materials is quantified with laser based non-intrusive measurements • Non-intrusive measurements allow in-situ characterization of size, volume fraction, and agglomeration • This technique measures with diameters of 25 nm and greater • Extension to the sub nm size range is possible Investigator: Parker, Engineering

  9. Critical issue for “exotic” materials is the precursor material which is normally liquid Combined methane fired and liquid spray burners produce powder material To date high uniformity silica films produced as well yttria stabilized zirconia powder Near term target materials are SnO2, PdO, CeO2 Flame Synthesis can be used to produce high value oxides and oxide films Silica film 2.0 mm Yttria stabilized zirconia powder Investigator: Parker, Engineering

  10. Ballistic imaging uses an ultra-fast laser pulse with a time gate to remove scattered photons from an image The near field region of sprays can be investigated with this technique Results from both water jets and diesel sprays show that liquid breakup is highly influenced by the turbulence of the jet Ballistic Imaging provides a unique method of imaging processes in optically dense media Breakup of the core of a high pressure liquid water jet Breakup of high pressure diesel spray Investigator: Parker, Engineering Electronically controlled diesel injector

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