Joshua Newbon
Aerodynamic Analysis of Grand Prix Cars Operating in Wake Flows
Newbon, Joshua; Sims-Williams, David; Dominy, Robert
Abstract
The effect of the upstream wake of a Formula 1 car on a following vehicle has been investigated using experimental and computational methods. Multiple vehicle studies in conventional length wind tunnels pose challenges in achieving a realistic vehicle separation and the use of a short axial length wake generator provides an advantage here. Aerodynamic downforce and drag were seen to reduce, with greater force reductions experienced at shorter axial spacings. With lateral offsets, downforce recovers at a greater rate than drag, returning to the level for a vehicle in isolation for offsets greater than half a car width.The effect of the wake was investigated in CFD using multiple vehicle simulations and non-uniform inlet boundary conditions to recreate the wake. Results closely matched those for a full two-vehicle simulation provided the inlet condition included unsteady components of the onset wake. Creating a nonuniform inlet condition allowed the wake parameters to be modified to test sensitivity to different wake features. Dynamic pressure deficit in the wake is shown to have the greatest impact on the following vehicle, reducing loading on the downforce producing surfaces. Wake up-wash and vortex flows are shown to have a smaller effect on downforce generated by the following car, but have an important role in diverting the dynamic pressure deficit upwards and over the following car.Future regulation changes, aimed at reducing the downforce loss experienced when following another car, should aim to reduce the velocity deficit onset to the following car; either by reducing wheel and underbody wakes, or by extracting the wake using up-wash from the rear wing.
Citation
Newbon, J., Sims-Williams, D., & Dominy, R. (2017). Aerodynamic Analysis of Grand Prix Cars Operating in Wake Flows. SAE International Journal of Passenger Cars - Mechanical Systems, 10(1), 318-329. https://doi.org/10.4271/2017-01-1546
Journal Article Type | Article |
---|---|
Online Publication Date | Mar 28, 2017 |
Publication Date | Mar 28, 2017 |
Deposit Date | Jul 14, 2017 |
Publicly Available Date | Sep 28, 2017 |
Journal | SAE International Journal of Passenger Cars - Mechanical Systems |
Print ISSN | 1946-3995 |
Electronic ISSN | 1946-4002 |
Publisher | SAE International |
Peer Reviewed | Peer Reviewed |
Volume | 10 |
Issue | 1 |
Article Number | SAE Paper 2017-01-1546 |
Pages | 318-329 |
DOI | https://doi.org/10.4271/2017-01-1546 |
Public URL | https://durham-repository.worktribe.com/output/1374025 |
Files
Published Journal Article
(4.8 Mb)
PDF
Copyright Statement
Copyright © 2017 SAE International. This paper is posted on this site with permission from SAE International. It may not be shared, downloaded, duplicated, printed or transmitted in any manner, or stored on any additional repositories or retrieval system without prior written permission from SAE.
You might also like
Flow separation from polygonal cylinders in an incident flow
(2023)
Journal Article
Representative On-Road Aerodynamic Yaw Angle Distribution in China for Vehicle Development
(2022)
Journal Article
Large Eddy Simulation of incident flows around polygonal cylinders
(2021)
Journal Article
Round-robin tests of porous disc models
(2019)
Journal Article
Downloadable Citations
About Durham Research Online (DRO)
Administrator e-mail: dro.admin@durham.ac.uk
This application uses the following open-source libraries:
SheetJS Community Edition
Apache License Version 2.0 (http://www.apache.org/licenses/)
PDF.js
Apache License Version 2.0 (http://www.apache.org/licenses/)
Font Awesome
SIL OFL 1.1 (http://scripts.sil.org/OFL)
MIT License (http://opensource.org/licenses/mit-license.html)
CC BY 3.0 ( http://creativecommons.org/licenses/by/3.0/)
Powered by Worktribe © 2024
Advanced Search