0
TECHNICAL PAPERS

Unsteady Computational Analysis of Vehicle Passing

[+] Author and Article Information
James Clarke

School of Mechanical, Aerospace & Civil Engineering,  The University of Manchester, Manchester M60 1QD, United Kingdom

Antonio Filippone

School of Mechanical, Aerospace & Civil Engineering,  The University of Manchester, Manchester M60 1QD, United Kingdoma.filippone@manchester.ac.uk

J. Fluids Eng 129(3), 359-367 (Aug 19, 2006) (9 pages) doi:10.1115/1.2427085 History: Received March 06, 2006; Revised August 19, 2006

This paper presents results of the simulation of two vehicles overtaking each other at highways conditions (30ms). The simulation was fully unsteady and tracks the maneuver for several body lengths from downstream to upstream. Different mesh strategies have been investigated and assessed. Structured methods with sliding planes have been found the most feasible. The results shown include the effects of relative speed and lateral separation. The passing maneuver is described in detail, and a number of physical phenomena are identified. In particular, the rapid fluid compression and acceleration at the nose passing situation yields a pulse in the drag of the overtaken vehicle. The high pressure bow wave followed swiftly by the low-pressure wake affects the side force and lateral stability at positions slightly different than the nose passing.

FIGURES IN THIS ARTICLE
<>
Copyright © 2007 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

Reference system for the overtaking maneuver

Grahic Jump Location
Figure 2

Deforming region of the mesh

Grahic Jump Location
Figure 3

“Oversized” cells adjacent to overtaking body

Grahic Jump Location
Figure 4

Final mesh strategy: x∕L=5.5

Grahic Jump Location
Figure 5

Grid with x∕L=3

Grahic Jump Location
Figure 6

Grid with x∕L=1

Grahic Jump Location
Figure 7

Grid with x∕L=0

Grahic Jump Location
Figure 8

Particle tracks at four positions. Top vehicle overtakes bottom vehicle from the right; Vr=20m∕s, Δy∕l=0.25.

Grahic Jump Location
Figure 13

CS history of the overtaken body at various lateral spacings, relative speed=20m∕s

Grahic Jump Location
Figure 14

CMZ history of the overtaken body at various lateral spacings, relative speed=20m∕s

Grahic Jump Location
Figure 9

CD history of the overtaken body at various relative speeds, lateral spacing y∕l=0.25

Grahic Jump Location
Figure 10

CS history of the overtaken body at various relative speeds, lateral spacing y∕l=0.25

Grahic Jump Location
Figure 11

CMZ history of the overtaken body at various relative speeds, lateral spacing y∕l=0.25

Grahic Jump Location
Figure 12

CD history of the overtaken body at various lateral spacings, relative speed=20m∕s

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In