Numerical Study on Understanding the Force and Moment Changes Acting on the Overtaking Vehicle During Overtaking Process

Park, Seong Oh; Lee, Jae Hak; Kim, Moon Sang; Jung, Deuk Young; Chang, Jianmei

doi:10.1007/s12239-023-0018-5

Cited by 1 publication

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“…Tang Hongtao and Tong Daoxian [7] simulated the transient overtaking process of right turning vehicles and straight driving vehicles, and found that as the speed of straight driving vehicles increased, their lateral force and yaw moment both increased, while the lateral force of right turning vehicles first increased and then decreased; As the turning radius of a right turning vehicle increases, the lateral force of both vehicles and the yaw moment of a straight vehicle decrease linearly, while the yaw moment of a right turning vehicle increases linearly. For research on different vehicle models, PARK [8] et al selected 14 relative positions when the DrivAer model overtook a truck and studied the changes in the flow field around the overtaking body. Obtained the relative positions of the maximum aerodynamic resistance and maximum yaw moment acting on overtaking vehicles; And it was clarified that the most sensitive aerodynamic characteristic parameter during overtaking is the yaw moment coefficient.…”

Section: Introductionmentioning

confidence: 99%

Aerodynamic Characteristics Analysis of Curve Overtaking Based on CFD

2023

jemm

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In this paper, numerical simulation of the overtaking process in a curve is carried out based on Computational Fluid Dynamics (CFD) and dynamic mesh technology, and the flow field distribution data between the main overtaking vehicle and the overtaken vehicle at different speeds are statistically analyzed. The study shows that: during the overtaking process in a bend, pressure and flow field changes of different degrees occurred between the two vehicles. As the relative position between the vehicles changes, the higher the speed of the main overtaking vehicle, the more drastic the aerodynamic force changes between the two vehicles; the fluctuation range of the change curve of the lateral force coefficient of the overtaken vehicle is larger, and the lateral force also appears to have a larger extreme value. The overtaking vehicle caused a forward shift of the overtaken vehicle's centre of pressure in relation to its centre of mass. This induced an increase in lateral force and swinging moment, rendering the vehicle more unstable and prone to rollover and skidding, severely compromising driving stability.

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Section: Introductionmentioning

confidence: 99%

Aerodynamic Characteristics Analysis of Curve Overtaking Based on CFD

2023

jemm

View full text Add to dashboard Cite

show abstract

Numerical Study on Understanding the Force and Moment Changes Acting on the Overtaking Vehicle During Overtaking Process

Cited by 1 publication

References 14 publications

Aerodynamic Characteristics Analysis of Curve Overtaking Based on CFD

Aerodynamic Characteristics Analysis of Curve Overtaking Based on CFD

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