Akademik Veri Yönetim Sistemi
AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2022, California, Amerika Birleşik Devletleri, 3 - 07 Ocak 2022, (Tam Metin Bildiri)
Aircraft designers usually opt for wind-tunnel experiments to determine the aerodynamics and flight stability characteristics of complex configurations. However, due to the availability of high-performance computing resources, Computational Fluid Dynamics (CFD) has emerged as an improved alternative. This study aims to develop a high fidelity validation test case for the Stability and Control Configuration (SACCON) Unmanned Combat Air Vehicle (UCAV) design. SACCON UCAV is a blended-wing-body design with a vortex-dominated flow field. The analysis is performed in both pitch and roll directions to find the damping coefficients with varying angles of attack. It is observed that the Reynolds-Averaged-Navier-Stokes (RANS) framework used in this research accurately predicts the static aerodynamic characteristics such as lift-curve slope, stall, and coefficient of drag. In addition, an excellent agreement is found in the damping derivatives in pitch and roll between numerical and experimental data. A parametric study is conducted on SACCON UCAV at a 5° angle of attack to monitor the effects of increasing Mach number and reduced frequency on damping coefficients. The results indicate a minimum impact of reduced frequency on pitch and roll damping derivatives. However, variation between subsonic and transonic Mach numbers is observed for both pitch and roll damping.