Experimental study of the effects of accelerated flow on the fluctuation, parameters and high-order values of velocity in the wake of a bluff body

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BARZANOONI V.; Bak Khoshnevis A.

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Journal: JOURNAL OF MECHANICAL ENGINEERING Year:2020 | Volume:49 | Issue:4 (89) Page(s): 27-36

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Title

Experimental study of the effects of accelerated flow on the fluctuation, parameters and high-order values of velocity in the wake of a bluff body

Author(s)

BARZANOONI V. | Bak Khoshnevis A. | Issue Writer Certificate

Keywords

accelerated flow

Kolmogorov scale length

experimental investigation

skewness

Abstract

In this study, flow dynamics and accelerated flow effects on the various parameters of the wake of a bluff body model Such as skewness, Kurtosis and Kolmogorov scale length, investigated experimentally. In addition, the effects of acceleration in the rate and trend of variation of the various parameters of the wake studied. The blow open circuit wind tunnel used to simulate fluid flow. An inverter that causes the changes in rotational speed of the wind tunnels electro motor has increased the inlet wind velocity continuously. On all wake positions, flow Accelerate and Increasing velocity creates smaller sized vortices. The passage of time and the increase in velocity do not have any effect on the changes of the skewness and kurtusis parameters in the near wake. By increasing the velocity, the values of the Kolmogorov scale length reduced generally. also; the values of the parameter in the far wake are greater than the close wake. There is a greater energy dissipation in the parts of the wake where the effects of the shear layers are and this causes smaller sized vortices

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APA: Copy

BARZANOONI, V., & Bak Khoshnevis, A.. (2020). Experimental study of the effects of accelerated flow on the fluctuation, parameters and high-order values of velocity in the wake of a bluff body. JOURNAL OF MECHANICAL ENGINEERING, 49(4 (89) ), 27-36. SID. https://sid.ir/paper/269888/en

Vancouver: Copy

BARZANOONI V., Bak Khoshnevis A.. Experimental study of the effects of accelerated flow on the fluctuation, parameters and high-order values of velocity in the wake of a bluff body. JOURNAL OF MECHANICAL ENGINEERING[Internet]. 2020;49(4 (89) ):27-36. Available from: https://sid.ir/paper/269888/en

IEEE: Copy

V. BARZANOONI, and A. Bak Khoshnevis, “Experimental study of the effects of accelerated flow on the fluctuation, parameters and high-order values of velocity in the wake of a bluff body,” JOURNAL OF MECHANICAL ENGINEERING, vol. 49, no. 4 (89) , pp. 27–36, 2020, [Online]. Available: https://sid.ir/paper/269888/en

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