EXPERIMENTAL DRAG REDUCTION BY INJECTION OF AIR BUBBLES IN A COUETTE-TAYLOR SYSTEM AND IN TURBULENT TAYLOR VORTEX FLOW

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MARYAMI REZA; JAVAD POOR MORTEZA; FARAHAT SAEID; SHAFIE MAYAM MOHAMMAD HOSSEIN

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Journal: Modares Mechanical Engineering Year:2015 | Volume:14 | Issue:1 Page(s): 113-122

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Title

EXPERIMENTAL DRAG REDUCTION BY INJECTION OF AIR BUBBLES IN A COUETTE-TAYLOR SYSTEM AND IN TURBULENT TAYLOR VORTEX FLOW

Author(s)

MARYAMI REZA | JAVAD POOR MORTEZA | FARAHAT SAEID | SHAFIE MAYAM MOHAMMAD HOSSEIN | Issue Writer Certificate

Keywords

BUBBLESQ2

TAYLOR-COUETTEQ2

SKIN FRICTIONQ2

TURBULENT FLOWQ2

Abstract

The effect of BUBBLES on frictional drag reduction has been studied experimentally using a vertical TAYLOR-COUETTE system. Air BUBBLES are injected into water flow at the bottom of the system. The flow between cylinders is a fully TURBULENT FLOW and Taylor vortices are formed in annulus gap. In these experiments, the variations range of rotational Reynolds number is 5000£Rew£70000. The variations of drag reduction in the presence of BUBBLES have been investigated by measuring the exerted torque on the inner cylinder. The results show that increasing rotational Reynolds number up to a certain amount leads to enhancement of BUBBLES effects on drag reduction while the effects are inversed for higher rotational Reynolds number. In this work, the acquired maximum drag reduction is about 5%.

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APA: Copy

MARYAMI, REZA, JAVAD POOR, MORTEZA, FARAHAT, SAEID, & SHAFIE MAYAM, MOHAMMAD HOSSEIN. (2015). EXPERIMENTAL DRAG REDUCTION BY INJECTION OF AIR BUBBLES IN A COUETTE-TAYLOR SYSTEM AND IN TURBULENT TAYLOR VORTEX FLOW. MODARES MECHANICAL ENGINEERING, 14(1), 113-122. SID. https://sid.ir/paper/179828/en

Vancouver: Copy

MARYAMI REZA, JAVAD POOR MORTEZA, FARAHAT SAEID, SHAFIE MAYAM MOHAMMAD HOSSEIN. EXPERIMENTAL DRAG REDUCTION BY INJECTION OF AIR BUBBLES IN A COUETTE-TAYLOR SYSTEM AND IN TURBULENT TAYLOR VORTEX FLOW. MODARES MECHANICAL ENGINEERING[Internet]. 2015;14(1):113-122. Available from: https://sid.ir/paper/179828/en

IEEE: Copy

REZA MARYAMI, MORTEZA JAVAD POOR, SAEID FARAHAT, and MOHAMMAD HOSSEIN SHAFIE MAYAM, “EXPERIMENTAL DRAG REDUCTION BY INJECTION OF AIR BUBBLES IN A COUETTE-TAYLOR SYSTEM AND IN TURBULENT TAYLOR VORTEX FLOW,” MODARES MECHANICAL ENGINEERING, vol. 14, no. 1, pp. 113–122, 2015, [Online]. Available: https://sid.ir/paper/179828/en

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