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Drag Investigation Around A Cylinder And Symmetric Airfoil In Tandem With Different Gaps And Angles Of Attack

Author

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  • Humam M. Salih

    (Mechanical Engineering Department, University of Technology, Iraq.)

  • Mustafa A. Abdulhussain

    (Mechanical Engineering Department, University of Technology, Iraq.)

Abstract

A Numerical simulation for the turbulent airflow around a symmetrical airfoil (NACA 0012) adjusted in tandem with circular cylinder, the airfoil were adjusted at variable angle of attack between (5-20°) with positive clockwise inclination setting the cylinder center in front of the leading-edge centroid using the realizable K-ɛ turbulent model in the ANSYS FLUENT 17 package is performed. The effect of changing the adjusted tandem bodies’ configuration, gap (0.05-0.1) and the cylinder size variation on the flow pressure distribution and the airfoil drag coefficient were investigated. The simulation considered in free stream uniform velocity of (25 m/sec) at standard atmospheric pressure. The results showed that using a cylinder with diameter equal to leading edge diameter causes more pressure drop as the tandem gap decreased, noticing that this effect becomes more significant at a high angle of attack. A valuable reduction in drag coefficient of this configuration is achieved and it becomes more with a smaller cylinder diameter with respect to gap distance.

Suggested Citation

  • Humam M. Salih & Mustafa A. Abdulhussain, 2019. "Drag Investigation Around A Cylinder And Symmetric Airfoil In Tandem With Different Gaps And Angles Of Attack," Journal of Mechanical Engineering Research & Developments (JMERD), Zibeline International Publishing, vol. 42(1), pages 26-33, January.
    • Handle: RePEc:zib:zjmerd:v:42:y:2019:i:1:p:26-33
    DOI: 10.26480/jmerd.01.2019.26.33
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    References listed on IDEAS

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    1. Wang, Ying & Li, Gaohui & Shen, Sheng & Huang, Diangui & Zheng, Zhongquan, 2018. "Investigation on aerodynamic performance of horizontal axis wind turbine by setting micro-cylinder in front of the blade leading edge," Energy, Elsevier, vol. 143(C), pages 1107-1124.
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