Abstract
An extension of two color particle image velocimetry (PIV) is described where the color images are recorded onto a single high-resolution (3060×2036 pixel) color CCD sensor. Unlike mono-color CCD sensors, this system not only eliminates the processing time and the subsequent digitization time of film-based PIV but also resolves the directional ambiguity of the velocity vector without using conventional image-shifting techniques. For comparing the spatial resolutions of film and CCD data, a calibration experiment is conducted by recording the speckle pattern onto 35 mm color film and using a CCD sensor under identical conditions. This technique has been successfully implemented for simulated turbine film-cooling flows in order to obtain a more detailed characterization of the coolant-injection phenomenon and its interaction with freestream disturbances.
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Received: 20 November 1996/Accepted: 29 January 1998
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Gogineni, S., Goss, L., Pestian, D. et al. Two-color digital PIV employing a single CCD camera. Experiments in Fluids 25, 320–328 (1998). https://doi.org/10.1007/s003480050236
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DOI: https://doi.org/10.1007/s003480050236