吉林大学学报(工学版) ›› 2013, Vol. 43 ›› Issue (03): 595-601.doi: 10.7964/jdxbgxb201303007

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Numerical simulation of the influence of rear-end panels on the wake flow field of a heavy-duty truck

HU Xing-jun, LI Teng-fei, WANG Jing-yu, YANG Bo, GUO Peng, LIAO Lei   

  1. State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130022, China
  • Received:2012-04-30 Online:2013-05-01 Published:2013-05-01

Abstract: Numerical simulation was used to calculate the flow field around a heavy-duty truck. This study attempted to reduce the drag by adding four rear-end panels with different sizes and styles. The influence of the rear-end panels on the flow field was studied, and the mechanism of generation of drag and cause of decrease of drag were investigated. The air velocity was set to 25 m/s without considering crosswind to simulate the real working condition. The results confirm the effectiveness of all the four types of rear-end panels in drag reduction, and a maximal drag reduction of 2.8% was obtained. Analysis suggests that the rear-end panels alter the structure of the ring vortex in the wake flow, thus reducing the drag.

Key words: vehicle engineering, heavy-duty truck, rear-end panel, wake flow field, ring vortex

CLC Number: 

  • U461.1
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