TAILIEUCHUNG - Numerical study of the flow over symmetrical airfoils with ground effects

The paper presents the ground effects on the flow over five NACA symmetrical airfoils by analyzing the coefficients of lift. The unbounded flow over a selected airfoil was first simulated, and the results were validated against the established data in order to validate the method used in obtaining the lift coefficients. | Numerical study of the flow over symmetrical airfoils with ground effects International Journal of Mechanical Engineering and Technology IJMET Volume 10 Issue 04 April 2019 pp. 1-8. Article ID IJMET_10_04_001 Available online at http ijmet JType IJMET amp VType 10 amp IType 4 ISSN Print 0976-6340 and ISSN Online 0976-6359 IAEME Publication Scopus Indexed NUMERICAL STUDY OF THE FLOW OVER SYMMETRICAL AIRFOILS WITH GROUND EFFECTS Aslam Abdullah Surendran Suresh Siti Juita Mastura Mohd Saleh Mohd Fadhli Zulkafli and Mohammad Fahmi Abdul Ghafir Department of Aeronautical Engineering Faculty of Mechanical and Manufacturing Engineering Universiti Tun Hussein Onn Malaysia Parit Raja Batu Pahat Johor Malaysia ABSTRACT The paper presents the ground effects on the flow over five NACA symmetrical airfoils by analyzing the coefficients of lift. The unbounded flow over a selected airfoil was first simulated and the results were validated against the established data in order to validate the method used in obtaining the lift coefficients. In the presence of ground we kept the angle of attack to be constantly zero throughout the computations. Ground clearances were set based on those for aircrafts whose wing cross sections are the airfoils of interest. ANSYS was used for such numerical computations. We illustrate percentage increment of lift that is inversely proportional to the ground clearance. This work sheds insight on the important parameters that need to be taken into account in the operational of an aircraft. Keywords Aerodynamics ground clearance ground effects lift coefficient symmetrical airfoils Cite this Article Aslam Abdullah Surendran Suresh Siti Juita Mastura Mohd Saleh Mohd Fadhli Zulkafli and Mohammad Fahmi Abdul Ghafir Numerical Study of the Flow Over Symmetrical Airfoils with Ground Effects International Journal of Mechanical Engineering and Technology 10 4 2019 pp. 1-8. http IJMET JType IJMET amp VType 10 amp

• Cơ khí - Chế tạo máy
• Flow over five NACA symmetrical airfoils
• Coefficients of lift
• Angle of attack
• Percentage increment of lift
• Phenomenon of ground effects