<div class="section abstract"><div class="htmlview paragraph">In order to establish a high-precision digital automotive climatic wind tunnel,
consider the influence of wind tunnel structure on automotive CFD simulation,
study the thermal flow field characteristics of automobiles in climatic wind
tunnels, and create a detailed digital model of the climatic wind tunnel using
CFD method. The simulation model was established based on the actual climatic
wind tunnels and vehicles, taking into account the structure of the climatic
wind tunnels, the equipment in the test section, the boundary layer suction, and
other interferences on the automotive. The simulation results are compared with
wind speed in front and altitude direction, surface pressure of the vehicle, and
underhood components’ temperature measurements in the climatic wind tunnel. Good
agreement is observed confirming that the simulation model can accurately
predict the thermal flow field characteristics of automobile in the climatic
wind tunnel. The study shows that the integration of the climatic wind tunnel
model in the automotive CFD simulation can improve the accuracy of the thermal
flow field, which can reduce the climatic wind tunnel tests in the development
of the project, reduce the development cost of the whole vehicle, and shorten
the development cycle.</div></div>