Aerodynamics characteristics of glider GL-1 based on computational fluid dynamics
Amalia E.a, Moelyadi M.A.a, Julistina R.a, Putra C.A.a
a Faculty of Mechanical and Aerospace Engineering, Institute of Technology Bandung, Bandung, 40132, Indonesia
Abstract
© Published under licence by IOP Publishing Ltd.Glider GL-1 was especially designed for thermal updraft condition of Indonesia. The development of GL-1 is the first in Indonesia to design a glider for aero sport purpose in cooperation with FASI. This glider needs a minimum aerodynamics efficiency of 8.333 to meet design requirement derived from thermal updraft condition, which needs rate of descent little than 3 m/s at gliding angle of 2 degree. Optimum flight condition for maximum range performance has been calculated to be 25 m/s at a condition of altitude between 300 – 2000 m with Reynolds number of 1 – 1.5 million. Computational Fluid Dynamics (CFD) was employed to do numerical analyses to predict aerodynamics characteristics of the glider. CFD by using half-glider meshing results maximum lift coefficient of 1.326 at angle of attack of 8 degree, and maximum aerodynamics efficiency of 19 at angle of attack 2 degree. The result of CFD by using full-glider meshing gives maximum lift coefficient of 1.2556 at angle of attack of 10 degree and maximum aerodynamics efficiency of 16 at angle of attack of 2 degree. Both of half-glider meshing and full-glider meshing are employing k-ϵ turbulence model. Comparison with preliminary design result and benchmarking with similar gliders data was also done.
Author keywords
Flight conditions,Indonesia,Maximum lift coefficient,Maximum ranges,Preliminary design
Indexed keywords
Funding details
This study was funded by P3MI research funding of Institute of Technology Bandung. We wish to thank Dr. Taufiq Mulyanto and team of design group for providing data of glider GL-1.