Miniature rainbow schlieren deflectometry system for quantitative measurements in microjets and flames

doi:10.1364/AO.46.002954

Title: Miniature rainbow schlieren deflectometry system for quantitative measurements in microjets and flames

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Abstract

Recent interest in small-scale flow devices has created the need for miniature instruments capable of measuring scalar flow properties with high spatial resolution. We present a miniature rainbow schlieren deflectometry system to nonintrusively obtain quantitative species concentration and temperature data across the whole field. The optical layout of the miniature system is similar to that of a macroscale system, although the field of view is smaller by an order of magnitude. Employing achromatic lenses and a CCD array together with a camera lens and extension tubes, we achieved spatial resolution down to 4 {mu}m. Quantitative measurements required a careful evaluation of the optical components. The capability of the system is demonstrated by obtaining concentration measurements in a helium microjet (diameter, d=650 {mu}m) and temperature and concentration measurements in a hydrogen jet diffusion flame from a microinjector(d=50 {mu}m). Further, the flow field of underexpanded nitrogen jets is visualized to reveal details of the shock structures existing downstream of the jet exit.

Authors:: Satti, Rajani P.; Kolhe, Pankaj S.; Olcmen, Semih; Agrawal, Ajay K

Publication Date:: Sun May 20 00:00:00 EDT 2007

OSTI Identifier:: 20929734

Resource Type:: Journal Article

Resource Relation:: Journal Name: Applied Optics; Journal Volume: 46; Journal Issue: 15; Other Information: DOI: 10.1364/AO.46.002954; (c) 2007 Optical Society of America; Country of input: International Atomic Energy Agency (IAEA)

Country of Publication:: United States

Language:: English

Subject:: 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; CAMERAS; CHARGE-COUPLED DEVICES; COMBUSTION; EQUIPMENT; EVALUATION; FLAMES; HELIUM; HYDROGEN; LENSES; MEASURING METHODS; NITROGEN; SPATIAL RESOLUTION; TEMPERATURE MEASUREMENT

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                    Satti, Rajani P., Kolhe, Pankaj S., Olcmen, Semih, and Agrawal, Ajay K. Miniature rainbow schlieren deflectometry system for quantitative measurements in microjets and flames.  United States: N. p., 2007. 
        Web.  doi:10.1364/AO.46.002954.

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                    Satti, Rajani P., Kolhe, Pankaj S., Olcmen, Semih, & Agrawal, Ajay K. Miniature rainbow schlieren deflectometry system for quantitative measurements in microjets and flames.  United States.  doi:10.1364/AO.46.002954.

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                    Satti, Rajani P., Kolhe, Pankaj S., Olcmen, Semih, and Agrawal, Ajay K. Sun .  
        "Miniature rainbow schlieren deflectometry system for quantitative measurements in microjets and flames".  United States.  
        doi:10.1364/AO.46.002954.

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@article{osti_20929734,

  title        = {Miniature rainbow schlieren deflectometry system for quantitative measurements in microjets and flames},

  author       = {Satti, Rajani P. and Kolhe, Pankaj S. and Olcmen, Semih and Agrawal, Ajay K},

  abstractNote = {Recent interest in small-scale flow devices has created the need for miniature instruments capable of measuring scalar flow properties with high spatial resolution. We present a miniature rainbow schlieren deflectometry system to nonintrusively obtain quantitative species concentration and temperature data across the whole field. The optical layout of the miniature system is similar to that of a macroscale system, although the field of view is smaller by an order of magnitude. Employing achromatic lenses and a CCD array together with a camera lens and extension tubes, we achieved spatial resolution down to 4 {mu}m. Quantitative measurements required a careful evaluation of the optical components. The capability of the system is demonstrated by obtaining concentration measurements in a helium microjet (diameter, d=650 {mu}m) and temperature and concentration measurements in a hydrogen jet diffusion flame from a microinjector(d=50 {mu}m). Further, the flow field of underexpanded nitrogen jets is visualized to reveal details of the shock structures existing downstream of the jet exit.},

  doi          = {10.1364/AO.46.002954},

  journal      = {Applied Optics},

  number       = 15,

  volume       = 46,

  place        = {United States},

  year         = {Sun May 20 00:00:00 EDT 2007},

  month        = {Sun May 20 00:00:00 EDT 2007}

}

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DOI: 10.1364/AO.46.002954

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