Study of flow around model of cooling tower by means of 2D Particle Image Velocimetry measurement

Barraclough, V.; Novotný, Jan; Šafařík, Pavel

doi:10.1051/epjconf/201714302004

Cited by 3 publications

(5 citation statements)

References 3 publications

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“…Some of the results were already presented in [1] and [2]. For this paper, special attention was paid to the measurement in the wake.…”

Section: Measurements and Resultsmentioning

confidence: 99%

“…It was explained in [1] and [2], that the model of the cooling tower later started to be called a hyperboloidshaped model because an original civil-engineering problem solved in a classical way (wind loadings on cooling towers were measured and evaluated) later turned into a pure mechanics of fluids problem. After all the pressures on the model had been measured, Particle Image Velocimetry got involved and the velocity fields around the model were caught.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Investigation of Vortex Structures in Wake of Hyperboloid-Shaped Model by Means of 2D Particle Image Velocimetry Measurement

2018

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This paper deals with flow around a bluff body of hyperboloid shape. It consists of results gathered in the course of research by means of Particle Image Velocimetry (PIV). The experiments were carried out by means of low-frequency 2D PIV in a range of Reynolds numbers from 40000 to 50000. A hyperboloid-shaped model was measured in a wind tunnel with a modelled atmospheric boundary layer (and additionally, in a low-speed wind tunnel with low turbulence). The model was tested in a subcritical range of Reynolds numbers and various planes in a wake of the model were captured with the intention of getting an estimation of 3D flow structures. The tunnel with the modelled atmospheric boundary layer has a high rate of turbulence, so the influence of the turbulence of incoming flow on the wake could be outlined. The ratio of the height of the model to a thickness of the modelled boundary layer in the tunnel was 1/3, meaning the turbulence in the boundary layer strongly influenced the flow around the model; it suppresses the wake which leads to a lot shorter area of recirculation than low turbulence incoming flow would cause.

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“…Some of the results were already presented in [1] and [2]. For this paper, special attention was paid to the measurement in the wake.…”

Section: Measurements and Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Vortex Structures in Wake of Hyperboloid-Shaped Model by Means of 2D Particle Image Velocimetry Measurement

2018

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show abstract

“…Results were already presented in a few papers (Eg. [1] and [2]). This contribution goes into more detail.…”

Section: Introductionmentioning

confidence: 99%

Compilation of Vortex Filament of Arch Vortex in Wake of Cooling Tower Model

Barraclough¹,

Novotný²,

Šafařík³

2018

Topical Problems of Fluid Mechanics 2018

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This paper deals with flow around a bluff body of hyperboloid shape. It consists of results gathered in the course of research by means of Particle Image Velocimetry (PIV) and Hot-Wire Anemometry (HWA). The experiments were carried out in a range of Reynolds numbers from 42000 to 52000. A model was measured in a wind tunnel with a modelled atmospheric boundary layer. The model was tested in a subcritical range of Reynolds number and various planes in a wake of the model were captured with the intention of getting a picture of an arch vortex, moreover the HWA system was used to get the frequencies of the vortex shedding.

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“…We tried to deal with some of these phenomena in [4]. For this work ( [4]), the hyperboloid model was measured by means of Particle Image Velocimetry.…”

Section: Introductionmentioning

confidence: 99%

“…For this work ( [4]), the hyperboloid model was measured by means of Particle Image Velocimetry. This measurement gave us the quick knowledge that there might be the arch vortex created in the wake.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of 3d Vortex Structures in Wake of Hyperboloid-Shaped Model

Barraclough¹,

Novotný²,

Šafařík³

2017

Topical Problems of Fluid Mechanics 2017

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The model of a hyperboloid shaped object was measured by means of 2D Particle Image Velocimetry in the Wind Tunnel with simulated atmospheric boundary layer. The model was tested in a subcritical range of Reynolds number. Various planes in a wake of the model were captured. One was set in the model axis and perpendicular to the ground and the averaged velocity field of this measurement revealed a possible arch vortex behind the model. Next, several planes perpendicular to the ground were measured. The averaged velocity field showed two symmetrical formations. From these measurements, the shape of the arch vortex was estimated.

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Study of flow around model of cooling tower by means of 2D Particle Image Velocimetry measurement

Abstract: Abstract. This paper deals with flow around a bluff body of hyperboloid shape. It combines results gathered in the course of research by means of Particle Image Velocimetry (PIV). The experiments were carried out by means of low-frequency 2D PIV and the Reynolds number was 43 000.

Cited by 3 publications

References 3 publications

Experimental Investigation of Vortex Structures in Wake of Hyperboloid-Shaped Model by Means of 2D Particle Image Velocimetry Measurement

Experimental Investigation of Vortex Structures in Wake of Hyperboloid-Shaped Model by Means of 2D Particle Image Velocimetry Measurement

Compilation of Vortex Filament of Arch Vortex in Wake of Cooling Tower Model

Experimental Investigation of 3d Vortex Structures in Wake of Hyperboloid-Shaped Model

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