2020/08/09 by Benjamin Bock, Bock, Benjamin
Engineering · #Aerodynamics and Fluid Dynamics Research #FOS: Physical sciences #Fluid Dynamics (physics.flu-dyn) #Fluid Dynamics and Turbulent Flows #Fluid Dynamics and Vibration Analysis
paper · pdf · doi:10.48550/arxiv.2008.03783
openalex publication_date 2020/08/09 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The wake of a SAE squareback vehicle model is studied both experimentally and numerically for a Reynolds-number of Reh = 1.0 \hspace5pt 106 .The investigation focuses on the coherent structures of the intermediate to largest length and time scales. Flow field as well as base pressure fields are observed for the understanding of the relation between the signals of these quantities. Generalizations and differentiations are made by comparison with the documented behavior of Ahmed or similar vehicle models or three-dimensional bluff bodies. In comparison the vortex shedding acts similar but is restricted to the upper half of the wake of the SAE vehicle model. Due to the localization and phase behavior of the vortex shedding the connection between the base pressure signals and the flow field is weak. However, the pressure signals may be a viable feedback sensor under certain conditions, for example in flow control applications. A flapping of the near wake is identified for the fluctuations of the low frequency time scales.