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Experimental study for the cross-flow around three cylinders in an isosceles right triangle configuration
AbstractWind tunnel experiments were conducted to measure the pressure distributions for three circular cylinders, with equal diameters, in an isosceles right triangle arrangement when subjected to a cross-flow. The pitch ratio P/D was fixed at 2.3.5 angles of incidence ranging from 0° to 315° that covered all orientations were investigated. Both smooth (low-turbulence) and turbulent inflows were employed. These experiments were carried out at 5 Reynolds numbers ranging from 2.1 × 105 to 6.2 × 105 when the incoming flow was smooth. For turbulent inflows, 7% and 16% turbulent intensities were used. Under the same turbulent intensities, two mean wind speeds (10 m/s and 15 m/s) were employed. The pressure distributions on the surface of each individual cylinder were measured using pressure transducers. Besides, four pressure distribution patterns over the cylinders were defined. Then, the differences between the pressure distributions over the cylinders in the subcritical and supercritical regimes were discussed. Furthermore, the relationships between pressure distributions in turbulent and smooth inflows were investigated. The aerodynamic force coefficients were also presented in this paper, and the classical Reynolds number effect was observed.
HighlightsThe aerodynamic characteristics of the three cylinders in an isosceles right triangle configuration were measured.The classical Reynolds number effect was found in the flow around the three cylinders.The aerodynamic characteristics of cylinder array in turbulent flow were approached that in supercritical region.Pressure coefficient distributions were divided into four types according to the curve shape.
Experimental study for the cross-flow around three cylinders in an isosceles right triangle configuration
AbstractWind tunnel experiments were conducted to measure the pressure distributions for three circular cylinders, with equal diameters, in an isosceles right triangle arrangement when subjected to a cross-flow. The pitch ratio P/D was fixed at 2.3.5 angles of incidence ranging from 0° to 315° that covered all orientations were investigated. Both smooth (low-turbulence) and turbulent inflows were employed. These experiments were carried out at 5 Reynolds numbers ranging from 2.1 × 105 to 6.2 × 105 when the incoming flow was smooth. For turbulent inflows, 7% and 16% turbulent intensities were used. Under the same turbulent intensities, two mean wind speeds (10 m/s and 15 m/s) were employed. The pressure distributions on the surface of each individual cylinder were measured using pressure transducers. Besides, four pressure distribution patterns over the cylinders were defined. Then, the differences between the pressure distributions over the cylinders in the subcritical and supercritical regimes were discussed. Furthermore, the relationships between pressure distributions in turbulent and smooth inflows were investigated. The aerodynamic force coefficients were also presented in this paper, and the classical Reynolds number effect was observed.
HighlightsThe aerodynamic characteristics of the three cylinders in an isosceles right triangle configuration were measured.The classical Reynolds number effect was found in the flow around the three cylinders.The aerodynamic characteristics of cylinder array in turbulent flow were approached that in supercritical region.Pressure coefficient distributions were divided into four types according to the curve shape.
Experimental study for the cross-flow around three cylinders in an isosceles right triangle configuration
Qiu, Xu (author) / Liu, Huiqun (author) / He, Minjuan (author) / He, Ran (author) / Dong, Jianyao (author)
Journal of Wind Engineering and Industrial Aerodynamics ; 170 ; 185-196
2017-08-18
12 pages
Article (Journal)
Electronic Resource
English
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