Determination of the aerodynamic drag coefficient for objects with real and scaled dimensions on the example of two vehicle bodywork concepts

With the development of motorization and the increase in vehicle speed, determining aerodynamic drag has become a key element in optimizing car design. Reducing air drag has a direct impact on fuel consumption, performance, and vehicle safety. The aim of this work is to numerically verify the effect of the Reynolds number on the obtained values of the aerodynamic drag coefficient Cd for both real-world objects and their models in a scale of 1:10. An additional aim is to compare the obtained results of numerical tests for 2 exemplary concepts of racing car bodywork.