Numerical Wind Tunnel Study Based on AAWT

Abstract:

Based on the model of aerodynamic-acoustic vehicle wind tunnel， a numerical wind tunnel model including accurate geometrical and physical boundary conditions is established； applying the international DrivAer standard model， and applying the wind tunnel test and numerical wind tunnel methodology， the correlation between the quality of the flow field in the empty wind tunnel， the correlation between the numerical simulation results of the three types of back-type of the DrivAer standard model and the physical test is respectively investigated to verify the quality of the empty wind tunnel flow field， the correlation between the numerical simulation results of the three types of back-type of the DrivAer standard model and the physical test， and attempts to analyze the mechanisms for the differences， and to explore the numerical wind tunnel to explore the engineering applicability of the numerical wind tunnel. The results show that the established numerical wind tunnel can better reproduce the wind tunnel test environment， and the error of the wind resistance coefficient of the DrivAer scalar model ranges from 2.6% to 5.9%， which is closer to the test data than that of the open road calculation. The consistency and accuracy of SAWTC's numerical wind tunnel based on the wind tunnel computational domain with the physical reality are verified， which provides a reference and basis for the optimization of automotive wind tunnel test， the improvement of numerical wind tunnel method and the aerodynamic prediction.