{"title":"Optimization of Propulsion in Flapping Micro Air Vehicles Using Genetic Algorithm Method","authors":"Mahdi Abolfazli, Ebrahim Barati, Hamid Reza Karbasian","volume":76,"journal":"International Journal of Mechanical and Mechatronics Engineering","pagesStart":719,"pagesEnd":724,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/9997093","abstract":"
In this paper the kinematic parameters of a regular Flapping Micro Air Vehicle (FMAV) is investigated. The optimization is done using multi-objective Genetic algorithm method. It is shown that the maximum propulsive efficiency is occurred on the Strouhal number of 0.2-0.3 and foil-pitch amplitude of 15°-30°. Furthermore, increasing pitch amplitude with respect to power optimization increases the thrust slightly until pitch amplitude around 30°, and then the trust is increased notably with increasing of pitch amplitude. Additionally, the maximum mean thrust coefficient is computed of 2.67 and propulsive efficiency for this value is 42%. Based on the thrust optimization, the maximum propulsive efficiency is acquired 54% while the mean thrust coefficient is 2.18 at the same propulsive efficiency. Consequently, the maximum propulsive efficiency is obtained 77% and the appropriate Strouhal number, pitch amplitude and phase difference between heaving and pitching are calculated of 0.27, 31° and 77°, respectively.<\/p>\r\n","references":"[1]\tY. Lian, and W. Shyy, \"Aerodynamics of Low Reynolds Number Plunging Airfoil under Gusty Environment\u201d, in proc. 45th AIAA Aero. Sci. Meeting and Exhibit, Reno, 2007.\r\n[2]\tK. D. Jones, and M.F. Platzer, \"Bio-Inspired Design of Flapping Wing Micro Air Vehicles \u2013An Engineer\u2019s Perspective\u201d, AIAA Paper, pp. 0037, 2006.\r\n[3]\tSh. Yang, Sh. Luoy, and F. Liuz, \"Optimization of Unstalled Pitching and Plunging Motion of an Airfoil\u201d, in proc. 44thAIAA Aero. Sci. Meeting and Exhibit, Nevada, 2006.\r\n[4]\tG.K. Taylor, R.L. Nudds, and A.L.R. Thomas, \"Flying and swimming animals cruise at a Strouhal number tuned for high power efficiency\u201d, Nature, vol. 42, no. 5, pp. 707, 2003.\r\n[5]\tM. Triantafillou, and D. Yue, \"Hydrodynamics of fishlike swimming\u201d, Annu. Review of Fluid Mech., vol. 32, pp. 33\u201353, 2000.\r\n[6]\tG. Pedro, A. Suleman, and N. Djilali, \"A numerical study of the propulsive efficiency of a flapping hydrofoil\u201d, Int. J. Num. Methods Fluids, vol. 42, pp. 493\u2013526. 2003.\r\n[7]\tM.R. Amiralaei, H. Alighanbari, and S.M. Hashemi, \"Flow field characteristics study of a flapping airfoil using computational fluid dynamics\u201d, J. Fluid Struct., vol. 27, pp. 1068\u20131085, 2001.\r\n[8]\tT. Theodorsen, General Theory of Aerodynamic Instability and the Mechanism of Flutter. NACA Report 496, 1935.\r\n[9]\tJ.D. Delaurier, \"An aerodynamic model for flapping-wing flight\u201d, Aeronautics J., vol. 97, pp. 125-130, 1993.\r\n[10]\tM. Abramowitz, Handbook of Mathematical Functions. Applied Mathematics Series, 1964.\r\n[11]\tY. Zhou, M. MAlam, H.X. Yang, H. Guo, and D.H. Wood, \"Fluid forces on a very low Reynolds number airfoil and their prediction\u201d, Int. J. Heat Fluid Flow, vol. 32, pp. 329\u2013339, 2011.\r\n[12]\tS.F. Hoerner, Fluid Dynamic Drag, Hoerner Fluid Dynamics, CA, 1965.\r\n","publisher":"World Academy of Science, Engineering and Technology","index":"Open Science Index 76, 2013"}