ANALISIS KARAKTERISTIK AERODINAMIK AIRFOIL LAMINAR UNTUK HIGH ALTITUDE LONG ENDURANCE (HALE) UAV

• Main Author: Efanullah Mughniamien, Takbier
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/66253
• Institution: Institut Teknologi Bandung

The development of unmanned aerial vehicles is one of the main focuses in today's aviation field for various missions. One of them is to use a High-Altitude Long Endurance (HALE) UAV as a substitute for satellites. Low-velocity airflow through airfoils has been extensively studied for its importance in many practical applications in aviation and turbomachinery. This flow is usually subcritical (mixed, transitioning to turbulent after separation) or critical (dominated by turbulent, only part of the boundary layer formed on the surface of the airfoil is laminar). In subcritical flow, the phenomenon of Laminar Separation Bubbles (LSB) is usually found in the boundary layer. The combination of flow instability and transition phenomena present in the boundary layer makes this type of flow difficult to model numerically. To simulate the characteristics of this flow correctly, it is necessary to analyze the turbulent model that will be used in CFD. In this study, a literature study was conducted to determine the appropriate turbulent model in the case of flow around the airfoil. The Transition Shear Stress Transport (4eq) turbulence model is a turbulence model that is selected based on the prediction accuracy of aerodynamic coefficients and physical phenomena that occur. The results of this simulation show that the laminar airfoil has a good ability to inhibit the transition and make the drag force smaller so that it can produce better performance. All numerical studies were carried out in the ANSYS Fluent 2021 R2 software.