Aeroacoustic Analysis of Dipole Noise Patterns in Low Reynolds Number Square Cylinder Flows

This research provides a detailed investigation into the mechanisms of aeroacoustic noise generation linked to square cylinder aerodynamics under low Reynolds number conditions. Utilizing ANSYS Workbench, fluid dynamic and acoustic interactions are analyzed at very low Reynolds numbers (Re = 100 and 200). The study focuses on key parameters driving noise production, such as turbulence, unsteady pressure fluctuations, and the interaction between the square cylinder's surface and the surrounding airflow. Findings reveal a characteristic dipole noise pattern at Re = 100 and Re = 200, with maximum noise levels located at the top and bottom surfaces due to predominant lift fluctuations. Conversely, noise levels are at their minimum within the vortex streets, driven primarily by drag fluctuations. These findings contribute to a broader understanding of the aeroacoustic properties of square cylinders, offering insight into mitigating noise in aerospace, civil engineering, and other noise-critical engineering applications.