Two-color digital PIV employing a single CCD camera |
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| Authors: | S Gogineni L Goss D Pestian R Rivir |
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| Institution: | (1) Innovative Scientific Solutions, Inc. 2766 Indian Ripple Road Dayton, OH 45440, USA, IN;(2) University of Dayton Research Institute 300 College Park Dayton, OH 45469, USA, US;(3) Propulsion Directorate Air Force Research Laboratory Wright-Patterson AFB, OH 45433, USA, US |
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| 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.
Received: 20 November 1996/Accepted: 29 January 1998 |
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