Abstract
The rear plan is one of the key factors that affect the separation of air flow at the vehicle rear.It has important theoretical guidance and engineering significance to study the influence of the rear plan on wake flow field for the early development and design of vehicle shape.Based on a simplified SUV model, the drag coefficients of the models with different rear plans are calculated. The velocity separation, pressure distribution and energy dissipation of air flow at the vehicle rear are compared and analyzed,demonstrating that the rear plan has influence on air separation and the formation of wake vortex at the vehicle rear.It is found that with the decrease of the rear plan, the separation of the air flow at the vehicle rear becomes weaker, the wake vortex gets smaller, and the drag coefficient reduces.
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