Analisis CFD Karakteristik Aerodinamika ....... (Awalu Romadhon dan Dana Herdiana) 45 ANALISIS CFD KARAKTERISTIK AERODINAMIKA PADA SAYAP PESAWAT LSU-05 DENGAN PENAMBAHAN VORTEX GENERATOR (ANALYSIS OF CFD AERODYNAMIC CHARACTERISTICS AT THE WING OF AIRCRAFT LSU-05 WITH THE ADDITION OF VORTEX GENERATOR) Awalu Romadhon * ) dan Dana Herdiana ** ) * ) Fakultas Teknik Universitas Nurtanio Bandung Jl. Pajajaran No.219, Arjuna, Cicendo, Bandung, Jawa Barat 40174 ** ) Pusat Teknologi Penerbangan Lembaga Penerbangan dan Antariksa Nasional Jl. Raya LAPAN, Sukamulya, Rumpin, Bogor 16350 Indonesia e-mail:awalu_romadhon@yahoo.com, dana_lapan@yahoo.com, Diterima: 14 Agustus 2017; Direvisi: 5 September 2017; Disetujui: 18 September 2017 ABSTRACT LSU-05 aircraft is one of the unmanned aerial vehicles (UAV), which is being developed by the Aeronautics Technology Center of LAPAN, whose mission is for research, observation, patrol, border surveillance, and investigation of natural disasters. This study aims to determine the effect of vortex generators on the aerodynamic characteristics of the LSU-05 Unmanned Aircraft wing. The method used is a numerical analysis with CFD simulation for predicting aerodynamic characteristics and flow phenomena that occur. The models used are the aircraft wing of the LSU-05 without vortex generator and with vortex generator designed with CATIA software. The simulation is using ANSYS Fluent software to determine changes in the aerodynamic characteristics of the wing after the addition of vortex generators such as the lift coefficient and drag coefficient. The results of the addition of vortex generator on LSU-05 wings are the increasing value of the maximum lift coefficient of the wing which becomes 1,34840 from 1,26450, it increases 0,0839 (6.63%) point, the increasing value of the drag coefficient on the angle of attack from -9⁰ to 11⁰, the decreasing value of the drag coefficient on the angle of attack 12⁰ up to 15⁰ and the increasing stall angle of wing from 11⁰ to 14⁰ or increased by 3⁰ (27,7%). Keywords: vortex generator, LSU-05, aerodynamic characteristics, CFD