Vortex patterns of the flow in a curved duct

Xiaoyun Wu; Sangding Lai; Kyoji Yamamoto; Shinichiro Yanase

doi:10.1016/j.egypro.2011.10.121

Vortex patterns of the flow in a curved duct

Xiaoyun Wu, Sangding Lai, Kyoji Yamamoto, Shinichiro Yanase

Research output: Contribution to journal › Conference article

Abstract

The vortex patterns of the secondary flow in a curved duct of square cross-section are numerically investigated. The flow is driven by the axial pressure gradient as well as the walls rotation of the duct except the outer wall around the center of curvature. When the rotation is in the same direction as the negative pressure gradient, the secondary flow shows complicated multiple patterns, which consists of two-vortex, four-vortex, eight-vortex or even non-symmetric secondary flow pattern. An analysis of linear stability on the flow is also carried out to distinguish possible flow patterns among multiple steady solutions.

Original language	English
Pages (from-to)	920-927
Number of pages	8
Journal	Energy Procedia
Volume	12
DOIs	https://doi.org/10.1016/j.egypro.2011.10.121
Publication status	Published - Jan 1 2011
Event	1st International Conference on Smart Grid and Clean Energy Technologies, ICSGCE 2011 - Chengdu, China Duration: Sep 27 2011 → Sep 30 2011

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Keywords

Curved duct
Screw pump
Secondary flow

ASJC Scopus subject areas

Energy(all)

Cite this

Wu, X., Lai, S., Yamamoto, K., & Yanase, S. (2011). Vortex patterns of the flow in a curved duct. Energy Procedia, 12, 920-927. https://doi.org/10.1016/j.egypro.2011.10.121

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N2 - The vortex patterns of the secondary flow in a curved duct of square cross-section are numerically investigated. The flow is driven by the axial pressure gradient as well as the walls rotation of the duct except the outer wall around the center of curvature. When the rotation is in the same direction as the negative pressure gradient, the secondary flow shows complicated multiple patterns, which consists of two-vortex, four-vortex, eight-vortex or even non-symmetric secondary flow pattern. An analysis of linear stability on the flow is also carried out to distinguish possible flow patterns among multiple steady solutions.

AB - The vortex patterns of the secondary flow in a curved duct of square cross-section are numerically investigated. The flow is driven by the axial pressure gradient as well as the walls rotation of the duct except the outer wall around the center of curvature. When the rotation is in the same direction as the negative pressure gradient, the secondary flow shows complicated multiple patterns, which consists of two-vortex, four-vortex, eight-vortex or even non-symmetric secondary flow pattern. An analysis of linear stability on the flow is also carried out to distinguish possible flow patterns among multiple steady solutions.

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10.1016/j.egypro.2011.10.121