Numerical investigations into the asymmetric effects on the aerodynamic response of a pitching airfoil |
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| Institution: | 1. Department of Aerodynamics, Nanjing University of Aeronautics and Astronautics Yudao Street 29, Nanjing, Jiangsu 210016, China;2. School of Engineering and Information Technology, University of New South Wales Canberra, ACT 2600, Australia;3. Aerodynamics Development Department, AVIC Aerodynamics Research Institute Yangshan Street 1, Shenyang, Liaoning 110034, China;1. Center of Excellence on Modelling and Control Systems (CEMCS), Department of Mechanical Engineering, Ferdowsi University of Mashhad, Mashhad 91775-1111, Iran;2. Department of Mechanical Engineering, Faculty of Eng., Khayyam University, Mashhad, Iran |
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| Abstract: | The effects of asymmetric sinusoidal motion on pitching airfoil aerodynamics were studied by numerical simulations for 2-D flow around a NACA0012 airfoil at Re=1.35×105. Various unsteady parameters (amplitude of oscillation, d; reduced frequency, k) were applied to investigate the effect of asymmetry parameter S on the instantaneous force coefficients and flow patterns. The results reveal that S has a noticeable effect on the aerodynamic performance, as it affects the instantaneous force coefficient, maximum lift and drag coefficient, hysteresis loops and the flow structures. |
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