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Stereoscopic PIV measurements of flow around a marine propeller SCIE SCOPUS

Title
Stereoscopic PIV measurements of flow around a marine propeller
Authors
Lee, SJPaik, BG
Date Issued
2004-01
Publisher
IOS PRESS
Abstract
A stereoscopic PIV (Particle Image Velocimetry) technique has been employed to measure the 3 dimensional flow structure of turbulent wake behind a marine propeller with 5 blades. The out-of-plane velocity component was measured using particle images captured simultaneously by two CCD cameras installed in the angular displacement configuration. 400 instantaneous velocity fields were acquired for each of four different blade phases of 0degrees, 18degrees, 36degrees and 54degrees. They were ensemble averaged to investigate the spatial evolution of propeller wake in the near wake region up to one propeller diameter 0 downstream. The phase-averaged velocity fields show clearly the viscous wake formed by the boundary layers developed along both surfaces of the blade. Tip vortices were generated periodically and the slipstream contraction occurs in the near-wake region. The out-of-plane velocity component has large values at the locations of tip and trailing vortices. With going downstream, the axial turbulence intensity and the strength of tip vortices were decreased due to the viscous dissipation, turbulence diffusion and blade-to-blade interaction. The difference in the mean velocity fields measured by SPIV and 2-D PIV methods was about 5% similar to 10%. However, the 2-D PIV results also give sufficient information on propeller wake beyond the region of X/D = 0.2.
Keywords
stereoscopic PrV(SPIV); propeller wake; tip vortex; wake sheet; PARTICLE IMAGE VELOCIMETRY
URI
https://oasis.postech.ac.kr/handle/2014.oak/18099
DOI
10.1007/BF03181482
ISSN
1343-8875
Article Type
Article
Citation
JOURNAL OF VISUALIZATION, vol. 7, no. 1, page. 25 - 32, 2004-01
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이상준LEE, SANG JOON
Dept of Mechanical Enginrg
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