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Proceedings Paper

Digital video camera for application of particle image velocimetry in high-speed flows
Author(s): Christian Willert; Boleslaw Stasicki; Markus Raffel; Juergen Kompenhans
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Paper Abstract

A high-speed digital camera based on video technology for application of particle image velocimetry in wind tunnels is described. The camera contains two independently triggerable interline CCD sensors which are mounted on two faces of a cube beam splitter permitting the use of a single lens. Each of the sensors has a minimal exposure time of 0.8 microsecond(s) with a trigger response time of less than 1 microsecond(s) . The asynchronous reset capability permits the camera to trigger directly off a pulsed laser with a repetition rate differing from the standard 25 Hz CCIR video frame rate. Captured images are digitized within and stored in RAM the camera which can be read through the parallel port of a computer. The camera is software configurable with the settings being non-volatile. Technical aspect such as sensor alignment and calibration through software are described. Close-up PIV measurements on a free jet illustrated that, in the future, the camera can be successfully utilized at imaging high-speed flows over a small field of view covering several cm2, such as the flow between turbine blades. Further, the electronic shutter permits its use in luminous environments such as illuminated laboratories, wind tunnels or flames.

Paper Details

Date Published: 29 September 1995
PDF: 11 pages
Proc. SPIE 2546, Optical Techniques in Fluid, Thermal, and Combustion Flow, (29 September 1995); doi: 10.1117/12.221515
Show Author Affiliations
Christian Willert, DLR (Germany)
Boleslaw Stasicki, DLR (Germany)
Markus Raffel, DLR (Germany)
Juergen Kompenhans, DLR (Germany)


Published in SPIE Proceedings Vol. 2546:
Optical Techniques in Fluid, Thermal, and Combustion Flow
Soyoung Stephen Cha; James D. Trolinger, Editor(s)

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