Effect of gap between the cab and the container on Aerodynamic characteristics of heavy Truck

摘要

The effects of the gap between the cab and the container of the heavy truck on its aerodynamic characteristics were simulated by means of a simplified Ground Transportation System (GTS) truck model using RNG k equations and dynamic mesh method. The finite volume method is used to discrete the governing equations, the second-order up wind difference scheme is adopted for the convection term and the centric difference scheme for the dissipation term. The discretion of time is carried out by a full-implicit time integral scheme. Analysis of the simulated flow fields and the change pattern of the aerodynamic drag under different gap length demonstrate that when the gap length change and the aerodynamic characteristics change. This paper studies the aerodynamic characteristics of heavy trucks by CFD simulation, to explore ways and methods to reduce aerodynamic drag when a heavy truck is in motion.