EXPERIMENTAL AND NUMERICAL INVESTIGATION OF THE LENGTH RATIO AND ANGLE OF ATTACK EFFECTS ON DYNAMIC BEHAVIOR OF TWO PLATES PERPENDICULAR TO THE CYLINDER

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ISVAND HASSAN; SALMANINEJAD ALI; SHARAFI AHMAD

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Journal: Modares Mechanical Engineering Year:2016 | Volume:16 | Issue:7 Page(s): 121-132

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Title

EXPERIMENTAL AND NUMERICAL INVESTIGATION OF THE LENGTH RATIO AND ANGLE OF ATTACK EFFECTS ON DYNAMIC BEHAVIOR OF TWO PLATES PERPENDICULAR TO THE CYLINDER

Author(s)

ISVAND HASSAN | SALMANINEJAD ALI | SHARAFI AHMAD | Issue Writer Certificate

Keywords

UNSTEADY FLOWQ2

VORTEX PANEL METHODQ1

ROTATIONAL AND VIBRATIONAL MOTIONQ1

FORCED VIBRATIONQ2

WIND TUNNEL TESTSQ1

Abstract

In this study, experimental and analytical UNSTEADY FLOW around a cylinder model with rotational degrees of freedom is discussed. Experimental studies at different speeds and angles of attack for two cylinder models with different length ratios have been done. Meanwhile the analyses of numerical technique known as VORTEX PANEL METHOD have been used. Analytical and experimental results show that the ROTATIONAL AND VIBRATIONAL MOTION and a combination of these behaviors occur. These types of behaviors depend on ratio of length plates to cylinder radius, primary object angle of attack and free stream velocity. At different speeds and at all angles of attack for a length of less than 1, the model has vibrational motion around a specific angle. This angle for cylinder with two plates is 90 degrees. Generally, the model tends toward vibrational motion at low angles of attack with increasing length ratio and free stream velocity occurring and by increasing the primary angle of attack the desire for vibration motion around a specific angle occurs. Also, in free stream velocity 10 (m/sec) and higher, for length ratio 4, the model had a steady rotational motion. In addition, angular velocity models and Strouhal number on rotational motion are calculated. The results show that by increasing the Reynolds Number, Strouhal number becomes fixed.

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APA: Copy

ISVAND, HASSAN, SALMANINEJAD, ALI, & SHARAFI, AHMAD. (2016). EXPERIMENTAL AND NUMERICAL INVESTIGATION OF THE LENGTH RATIO AND ANGLE OF ATTACK EFFECTS ON DYNAMIC BEHAVIOR OF TWO PLATES PERPENDICULAR TO THE CYLINDER. MODARES MECHANICAL ENGINEERING, 16(7), 121-132. SID. https://sid.ir/paper/178310/en

Vancouver: Copy

ISVAND HASSAN, SALMANINEJAD ALI, SHARAFI AHMAD. EXPERIMENTAL AND NUMERICAL INVESTIGATION OF THE LENGTH RATIO AND ANGLE OF ATTACK EFFECTS ON DYNAMIC BEHAVIOR OF TWO PLATES PERPENDICULAR TO THE CYLINDER. MODARES MECHANICAL ENGINEERING[Internet]. 2016;16(7):121-132. Available from: https://sid.ir/paper/178310/en

IEEE: Copy

HASSAN ISVAND, ALI SALMANINEJAD, and AHMAD SHARAFI, “EXPERIMENTAL AND NUMERICAL INVESTIGATION OF THE LENGTH RATIO AND ANGLE OF ATTACK EFFECTS ON DYNAMIC BEHAVIOR OF TWO PLATES PERPENDICULAR TO THE CYLINDER,” MODARES MECHANICAL ENGINEERING, vol. 16, no. 7, pp. 121–132, 2016, [Online]. Available: https://sid.ir/paper/178310/en

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