Comparison between empirical formulae of intake vortices

Wang, Yingkui; Jiang, Chen; Liang, Dongfang

doi:10.1080/00221686.2010.534279

Cited by 20 publications

(13 citation statements)

References 8 publications

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“…The measured velocity profiles are not in line with the V z models of e.g. Hite and Mih (1994) and Wang et al (2011). These models suggest that the maximum V z occurs at the axis of symmetry.…”

Section: Axial Velocity Profilesmentioning

confidence: 55%

“…A cylindrical coordinate system (r, θ, z) is applied where the flow field is presented in tangential (V θ ), radial (V r ) and axial (V z ) velocities. The measured profiles of V θ , V r and V z are compared with the V θ profile of the Burgers (1948) vortex model and with the V z profiles proposed by Hite and Mih (1994) and Wang et al (2011). In the vortex flow, the core radius r c is a characteristic parameter illustrating the radial position of transition between the vortex core and outer field.…”

Section: Research Outlinementioning

confidence: 98%

“…Yet another area of research is in validating vortex models using experimental data, e.g. Hite and Mih (1994), Wang, Jiang, and Liang (2011) and Sun and Liu (2015). Nevertheless, only limited accurate experimental data are available on measurements of the 3D-flow in both the outer field and vortex core at different vertical positions and especially regarding the axial flow profile in the vortex core and its gradient in the vertical direction.…”

Section: Problem Definitionmentioning

confidence: 99%

“…Various authors, e.g. Vatistas (1989), Mih (1990), Wang et al (2011) and Sun and Liu (2015), proposed expressions based on Eq. (10) without the exponential term and using a dimensionless radius R = r/r c .…”

Section: The Free-surface Vortex and The Burgers Vortex Modelmentioning

confidence: 99%

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Experimental study on the 3D-flow field of a free-surface vortex using stereo PIV

Duinmeijer

Oldenziel

Clemens

2019

Journal of Hydraulic Research

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In order to analyse the flow characteristics of free-surface vortexes and to validate the Burgers vortex model by using stereo particle image velocimetry, experiments are conducted in a 600 mm diameter vortex tank. Measured axial velocities indicate that 10-25% of the flow is transported through the vortex core. The velocity profiles show that the axial flow is concentrated in a domain bounded by two times the core radius. Despite Burgers' assumption of radially independent axial velocity profiles, the model quantifies the tangential velocity profile within a relative uncertainty of circa 10%. The measurements show that it seems valid to use Burgers' model to obtain an estimate for the core radius by taking the average axial velocity over a radial domain of approximately 2.2 times the core radius. The Burgers model quantifies the air core depth with an uncertainty of 20% relative to the measurements. When compared with the magnitude of vorticity diffusion by molecular viscosity, the experiments show that there is no significant diffusion by radial turbulence.

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Section: Axial Velocity Profilesmentioning

confidence: 55%

Section: Research Outlinementioning

confidence: 98%

Section: Problem Definitionmentioning

confidence: 99%

Section: The Free-surface Vortex and The Burgers Vortex Modelmentioning

confidence: 99%

See 2 more Smart Citations

Experimental study on the 3D-flow field of a free-surface vortex using stereo PIV

Duinmeijer

Oldenziel

Clemens

2019

Journal of Hydraulic Research

View full text Add to dashboard Cite

show abstract

“…Another advantage of PIV is that turbulence statistics including Turbulent Kinetic Energy (TKE) or Reynolds stresses result. PTV experiments of an intake vortex at a bottom outlet were conducted by Wang et al [11]. Li et al [12] used PIV and concluded that the tangential velocity distribution is similar to the Rankine vortex.…”

Section: Experimentation On Intake Vortices and Study Objectivesmentioning

confidence: 98%