Vertical Velocity Profile on the Noncircular Flow Cross-Section of Water Intake Pipeline with Deposition on Bottom

Xiao Xiao Li; Xiao Dong Zhao; Xiao Feng Luo

doi:10.4028/www.scientific.net/AMR.864-867.2050

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 864-867Vertical Velocity Profile on the Noncircular Flow...

Vertical Velocity Profile on the Noncircular Flow Cross-Section of Water Intake Pipeline with Deposition on Bottom

Abstract:

Under small water-intake flow or overhaul periods, sediments deposit in the water intake pipeline with noncircular flow cross-section formed. According to the hydrostatic settling test results of fine sediments in circular pipeline, the sectional features of the deposition on pipe bottom is provided. And the vertical velocity profiles on perpendicular bisectors of noncircular flow cross-sections are measured under three kinds of typical deposition thickness. The relative positions of the maximum velocity point and the center of flow cross-section should be determined with an overall consideration to the two factors of wall roughness and wall restraint which is controlled by the transverse width of flow cross-section. When the mean velocity of flow cross-section keeps a constant value, the larger the deposition thickness is, the larger the velocity near the deposition surface, which is more favorable for sediment incipient motion.

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Periodical:

Advanced Materials Research (Volumes 864-867)

Pages:

2050-2055

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.864-867.2050

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Online since:

December 2013

Authors:

Xiao Xiao Li*, Xiao Dong Zhao, Xiao Feng Luo

Keywords:

Incipient Velocity, Noncircular Flow Cross-Section, Siltation Feature, Vertical Velocity Profile, Water Intake Pipeline

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* - Corresponding Author

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