Numerical simulation of the aerodynamic characteristics of heavy-duty trucks through viaduct in crosswind  

作　　者：胡兴军 秦鹏 廖磊 郭鹏 王靖宇 杨博 

机构地区：[1]State Key Laboratory of Automobile Simulation and Control, Jilin University

出　　处：《Journal of Hydrodynamics》2014年第3期394-399,共6页水动力学研究与进展B辑（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.50805062);the Development Programs in Science and Technology of Jilin Province(Grant No20096005)

摘　　要：In our numerical simulation the hybrid mesh and the SST k-ω turbulence model are adopted to investigate the variations of the aerodynamic loads and the flow field of heavy-duty trucks while crossing a viaduct with 1.1 m high fences in a crosswind at a velocity of 20 m/s. The results show that, with the protection of a fence, the side force is weakened, and the rolling and yaw moments are strengthened while the truck is crossing the viaduct, which relatively reduces the roll-over safety and the driving stability of the truck. Meanwhile, the direction of the side force changes when the truck enters the viaduct, which makes the roll-over safety and the driving stability the lowest during the process.In our numerical simulation the hybrid mesh and the SST k-ω turbulence model are adopted to investigate the variations of the aerodynamic loads and the flow field of heavy-duty trucks while crossing a viaduct with 1.1 m high fences in a crosswind at a velocity of 20 m/s. The results show that, with the protection of a fence, the side force is weakened, and the rolling and yaw moments are strengthened while the truck is crossing the viaduct, which relatively reduces the roll-over safety and the driving stability of the truck. Meanwhile, the direction of the side force changes when the truck enters the viaduct, which makes the roll-over safety and the driving stability the lowest during the process.

关 键 词：computational fluid dynamics heavy-duty truck CROSSWIND cross viaduct aerodynamic loads flow field 

分 类 号：U461.1[机械工程—车辆工程]