Abstract
The purpose of this work is to investigate the unsteady forced surface inflating (UFSI) effect on lift coefficient of a pitching airfoil. Thus, 2D unsteady compressible flow around a pitching airfoil is analyzed by means of coarse grid CFD (CGCFD) method and spring dynamic grids network. At first to validate the code for moving boundary cases, the predicted lift coefficient of pitching airfoil is compared with experiments. Simultaneously, the CGCFD results are compared with the RANS simulation. Then UFSI is added to the pitching airfoil. The effects of unsteady parameters such as the inflation amplitude and phase difference between pitching and inflation is investigated on lift and pressure coefficients of pitching airfoil. According to the results, UFSI, with zero degree phase difference between pitching and inflation, help to postpone the dynamic stall.
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Ali Heydari was born in Mashhad, Iran, in 1983. He received a BS degree in Mechanical engineering, in 2006, and an MS degree in Energy Conversion, in 2006, from the Mechanical Engineering Department of Ferdowsi University, Iran, where he got the Ph.D. degree too in the same subject. His research interests include CFD, unsteady aerodynamics, boundary layer characteristics and solar energy, and he is currently working as a faculty member (Assistant professor) in the Mechanical Engineering Department at the Islamic Azad University of Semnan, Iran.
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Heydari, A., Pasandideh-Fard, M. Lift characteristics of pitching NACA0015 airfoil due to unsteady forced surface inflation. J Mech Sci Technol 29, 2365–2373 (2015). https://doi.org/10.1007/s12206-015-0534-y
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DOI: https://doi.org/10.1007/s12206-015-0534-y