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Title: Conditioning Of Swirling And Stratified Pipe Flow-: Analysis With Laser Doppler- Velocimetry
Author: Denis F. Hinz Simon Graner C Hristian Breitsamter
Source: Flomeko 2016
Year Published: 2016
Abstract: Flow conditioning can be used for eliminating swirl, restoring flow symmetry, and generating a repeatable, fully developed flow profile upstream from flow measurement devices. In particular, the conditioning with tube bundles and straightening vanes has found many applications in flow mete ring. In this article, we use laser -Doppler velocimetry (LDV) to analyze flow profiles downstream from three different flow conditioners - a tube bundle conditioner, a Spearman conditioner, and a Zanker conditioner. We study the performance of these three devices with respect to conditioning swirling and thermally stratified pipe flows. For a quantitative comparison, we use selected performance indicators measuring the profile flatness , the asymmetry of the profile, the swirl angle of the secondary flow, an d the turbulence intensity in the core region with respect to a fully developed reference profile.

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