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Sustained simultaneous high-speed imaging of scalar and velocity fields using a single laser

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Abstract

A high-speed technique that combines planar laser induced fluorescence (PLIF) detection of biacetyl and particle image velocimetry (PIV) for simultaneous imaging of scalar and velocity fields is demonstrated at a frame rate of 12 kHz for up to 32500 consecutive frames. A single diode-pumped, frequency-tripled Nd-YAG laser was used for excitation. Wavelength-separated recording was achieved for Mie scattering from silicone oil droplets with a CMOS camera and for the red-shifted fluorescence from biacetyl with an image-intensified CMOS camera. Interference between PIV and PLIF tracers was found to be negligible. Cross-talk between PIV and PLIF signals was low and a strategy to completely eliminate it was devised and is discussed. The signal-to-noise ratio is about 9 for single-shot scalar images. Example image sequences were recorded in an atmospheric pressure air jet at Re=2000.

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Authors and Affiliations

  1. Department of Mechanical Engineering, The University of Michigan, 2026 W.E. Lay Automotive Laboratory, 1231 Beal Ave., Ann Arbor, MI, 48109-2133, USA

    C.M. Fajardo, J.D. Smith & V. Sick

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  1. C.M. Fajardo
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  2. J.D. Smith
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  3. V. Sick
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Correspondence to C.M. Fajardo.

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PACS

42.62.Fi; 33.50.Dq; 06.30.Gv; 06.60.Jn

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Fajardo, C., Smith, J. & Sick, V. Sustained simultaneous high-speed imaging of scalar and velocity fields using a single laser. Appl. Phys. B 85, 25–30 (2006). https://doi.org/10.1007/s00340-006-2368-x

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  • DOI: https://doi.org/10.1007/s00340-006-2368-x

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