期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2012
卷号：15
期号：6
出版社：IOP Publishing
摘要：PIV (Particle Image Velocimetry), as an non-intrusive flow measurements technology, is widely used to investigate the flow fields in many areas. 3-D (three Dimensional) PIV has seldom been used to measure flow field in rotational impeller of centrifugal pump due to the difficulty of calibratio n in samll space. In this article, a specially manufactured water tank was used to perform the calibration for 3-D PIV measurement. The instantaneous absolute velocity in one impeller passage was obtained by merging of three sub zo nes and the relative velocity was acq uired by velocity decomposition. The result shows that, when the pump runs at the condition o f design flow rate, the radial component velocity Wrappears a concave distribution except the condition of R=45 mm. With the increase of radius, the circumference location of the minimum radial component velocity Wrmoves from the pressure side to the suction side. At the same time, t he tangential component velocity Wθon the suction side decreases gradually with the increase of radius, while the component on the pressure side increases gradually. The secondary flow in different radius section has also been sho wn. At last, the error of PIV measurement s was analyzed, which shows that the test results are accurate and the measured data is reliable
