Numerical Simulation of Aerodynamics and Aeroacoustics Wind Tunnel for Whole Vehicle

Abstract:

In this paper， the simulation domain of the aerodynamics and aeroacoustics wind tunnel is established through actual measurement， taking into account the connection between the test section and the outside world， the fluctuating pressure， and the transient air flow exchange， so as to better reproduce the flow characteristics and unsteady characteristics of the flow field in the test section of the wind tunnel. The comparison between the numerical simulation results and the wind tunnel measurement results in the characteristic physical quantities such as velocity distribution， static pressure gradient， wind tunnel pressure balance outlet， buffer flow outlet and other representative flows and pressures shows that the numerical simulation results in the wind tunnel simulation domain can better fit the actual flow characteristics of the wind tunnel. The real vehicle model is used to conduct numerical simulation in the wind tunnel simulation domain and the traditional cuboid simulation domain respectively， and the results are compared with the wind tunnel test results. The results show that the numerical simulation results in the wind tunnel calculation domain are closer to the wind tunnel test results.