PIV Measurements in Pumps
نویسنده
چکیده
Digital Particle Imaging Velocimetry (DPIV) is a powerful nonintrusive measuring technique that has become popular in the last decade with the availability of commercial systems. In contrast to Particle Image Velocimetry (PIV), which utilizes analogue imaging and therefore time-consuming post processing, for DPIV digital video recording is encountered which is ideally suited for digital data processing. This offers the advantage of near real-time velocity measurements and therefore eases application. The ability to measure instantaneous planar velocity fields makes it attractive for investigations of complex flow fields encountered in pumps. While standard systems allow measurement of two velocity components, stereo DPIV will deliver all three components in the measuring plane. This paper gives an overview on the basic principles of DPIV and the main components of standard systems. Special effort is made to report on the particularities of measurements in stationary as well as rotating components of pumps. The main topics of this report are:
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