THREE-DIMENSIONAL NUMERICAL INVESTIGATION OF STATIC AERODYNAMIC COEFFICIENTS FOR AN ARTILLERY PROJECTILE USING STEADY-STATE RANS METHODOLOGY
Damir D. Jerković, Abdellah Ferfouri, Nebojša Hristov, Toufik Allouche, Igor Radisavljević and Mladen Josijević (DOI: 10.24874/jsscm.2025.19.02.05)
Abstract
This paper presents a numerical analysis of the static aerodynamic coefficients of the 155 mm M107 spin-stabilized projectile over Mach numbers ranging from 0.5 to 3.0. Building upon previous axisymmetric 2D research, a 3D steady-state RANS approach was implemented using an optimized structured O-grid topology to resolve the asymmetric flow field. The performance of the SST k-ω and Realizable k-ε turbulence models was evaluated at angles of attack of 2°, 5°, and 8° to determine the coefficients of axial force, normal force, and pitching moment. Numerical results were compared with experimental measurements for the M107 and M101 projectiles. The results demonstrate that the selected numerical approach effectively predicts the considered aerodynamic loads, ensuring a reliable extraction of the static aerodynamic derivatives. This work confirms that the computational methodology provides an efficient tool for generating high-fidelity aerodynamic data for trajectory and stability assessments.
