2b5f7882-7748-4251-8d6a-dc70c12bdedb20210519031419987wseas:wseasmdt@crossref.orgMDT DepositWSEAS TRANSACTIONS ON FLUID MECHANICS2224-347X1790-508710.37394/232013http://wseas.org/wseas/cms.action?id=40361420211420211610.37394/232013.2021.16https://wseas.org/wseas/cms.action?id=23282Sharul ShamDolDepartment of Mechanical Engineering Abu Dhabi University Abu Dhabi, P.o. Box 59911 United Arab EmiratesGrid fins are normally placed at the rear end of cruise missiles, rockets and other ballistic devices to control their trajectory especially at the final stage of flight. These fins provided fine control of the pitch, yaw and other lateral movements, allowing for higher stability and accuracy of the cruise missiles. This project investigates computationally the relation between grid fins inner lattice structures dimensionless parameters and the fins aerodynamics drag coefficient. The project gathered data from 12 different fins by varying the parameters of its internal lattice structure such as thickness, width and chord at various angles of attack (0°, 20° and 40°). The freestream was set at a constant speed of 150 m/s that gives Reynolds number > 1.7 x 106 . The results were experimentally compared by using a re-scaled model of a single fin in a sub-sonic wind tunnel, achieving a difference in results of not exceeding 6%. The results obtained that as the width-chord ratio increases, the aerodynamics drag coefficient increases for fixed thickness-width ratio. The results also demonstrated that as the angle of attack increases, the aerodynamics drag increases. The thickness-width ratio has the larger impact on the aerodynamics drag. The results can be used to improve the design of guided cruise missiles.5192021519202192101https://www.wseas.org/multimedia/journals/fluid/2021/a205113-005(2021).pdf10.37394/232013.2021.16.9https://www.wseas.org/multimedia/journals/fluid/2021/a205113-005(2021).pdf10.21608/amme.2016.35168El-Mahdy, L. A., M. Y. M. Ahmed, O. K. Mahmoud, and O. E. Abdel-Hameed. "EXPERIMENTAL, COMPUTATIONAL, AND EMPIRICAL EVALUATION OF SUPERSONIC MISSILE AERODYNAMIC COEFFICIENTS." In The International Conference on Applied Mechanics and Mechanical Engineering, vol. 17, no. 17th International Conference on Applied Mechanics and Mechanical Engineering, pp. 1-15. Military Technical College, 2016. 10.1109/icmsao.2019.8880426Azeez, Abid Abdul, Mohamed Gadala, Nasr Al Khudhiri, and Sharul Sham Dol. "Aerodynamics Optimization of RC Plane Winglet." In 2019 8th International Conference on Modeling Simulation and Applied Optimization (ICMSAO), pp. 1-5. IEEE, 2019. 10.1088/1757-899x/715/1/012015Dol, Sharul Sham. "Aerodynamic optimization of unmanned aerial vehicle for offshore search and rescue (SAR) operation." In IOP Conference Series: Materials Science and Engineering, vol. 715, no. 1, p. 012015. IOP Publishing, 2020. 10.29252/jafm.13.03.30414ElGhazali, A. F., and S. S. Dol. "Aerodynamic Optimization of Unmanned Aerial Vehicle through Propeller Improvements." Journal of Applied Fluid Mechanics 13, no. 3 (2020): 793- 803. 10.1016/j.ast.2020.106005Lai, Jiang, Zhongliang Zhao, Xiaobing Wang, Hao Li, and Qian Li. "Numerical investigation of pitch motion induced unsteady effects on transverse jet interaction." Aerospace Science and Technology 105 (2020): 106005. 10.2514/1.c033504Debiasi, Marco, and Yan Zeng. "Forces and moments generated by swept-back grid fins with sharp leading edges." Journal of Aircraft 53, no. 6 (2016): 1964-1968. 10.1108/hff-06-2017-0259Decrocq, Cédric, Bastien Martinez, Marie Albisser, Simona Dobre, Patrick Gnemmi, Yannick Bailly, and Jean-Claude Roy. "Aerodynamic prediction of a projectile fitted with fins." International Journal of Numerical Methods for Heat & Fluid Flow (2018). 10.1109/dasa51403.2020.9317118Khan, Mohammad Osama, Mohammad Anas Khan, and Sharul Sham Dol. "Effects of Chevrons on the Acoustic Noise and Velocity Patterns of Aircraft Nozzles." In 2020 International Conference on Decision Aid Sciences and Application (DASA), pp. 845-849. IEEE, 2020. 10.37394/23202.2021.20.5Zayed Almheiri, Rawan Aleid, Sharul Sham Dol, “Design of Fixed-Wing and Multi-Copter Hybrid Drone System for Human Body Temperature Measurement during COVID-19 Pandemic”, WSEAS TRANSACTIONS ON SYSTEMS, 20, pp. 31-39, 2021. 10.1088/1742-6596/1005/1/012013Faza, G. A., H. Fadillah, F. Y. Silitonga, and Mochamad Agoes Moelyadi. "Study of Swept Angle Effects on Grid Fins Aerodynamics Performance." In Journal of Physics: Conference Series, vol. 1005, no. 1, p. 012013. IOP Publishing, 2018. 10.1016/j.cja.2017.04.013Huang, Chengde, L. I. U. Wen, and Y. A. N. G. Guowei. "Numerical studies of static aeroelastic effects on grid fin aerodynamic performances." Chinese journal of aeronautics 30, no. 4 (2017): 1300-1314. 10.1016/j.asr.2018.06.001Peng, K., F. Hu, D. Wang, P. N. Okolo, M. Xiang, G. J. Bennett, and W. Zhang (2018). Grid fins shape design of a launch vehicle based on sequential approximation optimization. Advances in Space Research 62(7), 1863-1878. 10.2514/1.a33189Despeyroux, Antoine, Jean-Pierre Hickey, Robert Desaulnier, Ryan Luciano, Michael Piotrowski, and Nicolas Hamel. "Numerical analysis of static and dynamic performances of grid fin controlled missiles." Journal of Spacecraft and Rockets 52, no. 4 (2015): 1236- 1252. 10.2514/3.46754Burkhalter, John E., Roy J. Hartfield, and Todd M. Leleux. "Nonlinear aerodynamic analysis of grid fin configurations." Journal of Aircraft 32, no. 3 (1995): 547-554. 10.1177/0954410018778790Liu, Yuanchun, Zhi-xun Xia, and Jun Liu. "Numerical simulation of aerodynamic characteristics and heating for grid fin missiles." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 233, no. 7 (2019): 2368- 2377. Dikbaş, Erdem. "Design of a grid fin aerodynamic control device for transonic flight regime." Master's thesis, MIDDLE EAST TECHNICAL UNIVERSITY, 2015. Ledlow, Timothy. "Integration of Grid Fins for the Optimal Design of Missile Systems." PhD diss., 2014. Sh. Sham Dol; S. Shahid Pervaiz; M. Uzair; Sh. Khalid Bashir; M. Mustafa Elzughbi. “Design of Solar-powered Endurance Glider with Vortex Generators”. Journal of Renewable Energy Research and Application (RERA), 2020. 10.1088/1757-899x/715/1/012070Sharul Sham Dol, Siaw Khur Wee, Hiang Bin Chan, Perumal Kumar, “Turbulence Characteristics behind a Flexible Vortex Generator”, WSEAS TRANSACTIONS ON FLUID MECHANICS, 14, pp. 1-7, 2019. 10.46300/9104.2020.14.17Alekseev, A., A. Maksimov, and A. Tarasov. "CFD investigations of the effect of rotating wheels, ride height and wheelhouse geometry on the drag coefficient of electric vehicle." International Journal of Mechanics 14 (2020): 130-134. 10.1088/1757-899x/78/1/012039Yong, T. H., and Sharul Sham Dol. "Design and development of low-cost wind tunnel for educational purpose." In IOP Conference Series: Materials Science and Engineering, vol. 78, no. 1, p. 012039. IOP Publishing, 2015. Dol, Sharul Sham, and MA Mohd Nor. "Flow visualization of the vortex shedding of a stationary circular cylinder by an improved smoke-wire technique." WSEAS transactions on fluid mechanics 1, no. 6 (2006): 745. Dol, Sharul S. "Weakened vortex shedding from a rotating cylinder." International Journal of Mechanical and Mechatronics Engineering 7, no. 10 (2013).