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Experimental Investigation of Automotive Vehicle Transient Aerodynamics with a Reduced-Scale Moving-Model Crosswind Facility

Bell, James and Wilhelmi, Henning and Heine, Daniela and Jessing, Christoph and Wagner, Andreas and Wiedemann, Jochen and Ehrenfried, Klaus and Wagner, Claus (2020) Experimental Investigation of Automotive Vehicle Transient Aerodynamics with a Reduced-Scale Moving-Model Crosswind Facility. SAE Technical Papers, 2020 (0671), pp. 1-12. Society of Automotive Engineers (SAE) International. doi: 10.4271/2020-01-0671. ISSN 0148-7191.

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Official URL: https://doi.org/10.4271/2020-01-0671


Automotive vehicles operate in complex, transient aerodynamic conditions that can potentially influence their operational efficiency, performance and safety. A moving-model facility combined with a wind-tunnel is an experimental methodology that can be utilized to model some of these transient aerodynamic conditions. This experimental methodology is an alternative to wind-tunnel experiments with additional crosswind generators or actively yawing models, and has the added benefit of modelling the correct relative motion between the vehicle and the ground/infrastructure. Experiments using a VW Golf 7 were performed with a 1:10 scale model at the moving-model facility at DLR, Göttingen and a fullscale, operational vehicle at the BMW Ascheim side-wind facility. Successful functionality of the newly developed automotive-vehicle configuration of the moving-model facility - including the side windtunnel operation, rotating wheels in contact with the ground, and data-acquisition on-board the moving model - was achieved. Direct comparison of transient pressure at 24 locations across the front and rear bumpers and over the centerline of the vehicles show relatively good agreement between the two methodologies; establishing the moving-model facility as a viable reduced-scale methodology for investigating transient aerodynamics of automotive vehicles. Analysis of the time-resolved pressure measurements provides insight into the sensitivity of the surface pressure to transient crosswind; with indications that transient characteristics can only be captured with transient modelling of the crosswind-vehicle interaction.

Item URL in elib:https://elib.dlr.de/135168/
Document Type:Article
Additional Information:ISSN: 0148-7191 e-ISSN: 2688-3627
Title:Experimental Investigation of Automotive Vehicle Transient Aerodynamics with a Reduced-Scale Moving-Model Crosswind Facility
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Bell, JamesJames.Bell (at) dlr.dehttps://orcid.org/0000-0001-8319-9817
Wilhelmi, HenningHenning.Wilhelmi (at) dlr.deUNSPECIFIED
Heine, DanielaDaniela.Heine (at) dlr.deUNSPECIFIED
Jessing, ChristophUniversität Stuttgart, IVKUNSPECIFIED
Wagner, AndreasUniversität Stuttgart, IVKUNSPECIFIED
Wiedemann, JochenUniversität Stuttgart, IVKUNSPECIFIED
Ehrenfried, KlausKlaus.Ehrenfried (at) dlr.deUNSPECIFIED
Wagner, ClausClaus.Wagner (at) dlr.deUNSPECIFIED
Date:14 April 2020
Journal or Publication Title:SAE Technical Papers
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
DOI :10.4271/2020-01-0671
Page Range:pp. 1-12
EditorsEmailEditor's ORCID iD
Publisher:Society of Automotive Engineers (SAE) International
Series Name:SAE Technical Papers
Keywords:automotive, aerodynamics, ground vehicle, crosswind, side wind stability, gust,
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Transport System
DLR - Research area:Transport
DLR - Program:V VS - Verkehrssystem
DLR - Research theme (Project):V - Energie und Verkehr
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Ground Vehicles
Deposited By: Bell, Dr. James
Deposited On:05 Jun 2020 12:05
Last Modified:05 Jun 2020 12:05

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