An aerodynamic database of synchronized surface pressure and flow field for 2D rectangular cylinders

Flow field and pressure measurements are typically conducted independently in the wind tunnel. Consequently, a comprehensive aerodynamic database, incorporating synchronized flow and pressure fields for rectangular cylinders, is notably lacking despite its paramount importance in both fundamental research and engineering applications. In this study, a synchronized particle image velocimetry (PIV) and multi-point pressure scanning (SPMPS) test method is employed to simultaneously capture the synchronized flow and pressure fields of rectangular cylinders with a low sampling frequency of 15Hz. Rectangular cylinders with multiple side ratios ranging from 0.4 to 5 under a number of wind angles of attack ranging from 0 to 90 with 5-degree interval were tested in close-loop wind tunnel with less than 0.4% turbulence intensity, thereby establishing a unique synchronized aerodynamic database for rectangular cylinders with a total of 299 cases. Additionally, a deep neural network model was trained to predict mean pressure coefficients for rectangular cylinders with arbitrary side ratios less than 5 and various angles of attack, significantly enhancing the comprehensiveness of the database.