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Characterization of the Transient Airflow Around a Vehicle on Public Highways

Jessing, Christoph and Wilhelmi, Henning and Wittmeier, Felix and Dillmann, Andreas and Wiedemann, Jochen (2019) Characterization of the Transient Airflow Around a Vehicle on Public Highways. 12th FKFS Conference, 1.-2. Okt. 2019, Stuttgart, Deutschland.

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Official URL: https://www.fkfs-conference.de/registration

Abstract

Natural wind, roadside obstacles, terrain roughness, and traffic can influence the incident flow of a vehicle driven on public roads. These on-road conditions differ from the idealized statistical steady-state flow environment utilized in CFD simulations and wind tunnel experiments. For this reason, the transient aerodynamic characterization of the airflow around a vehicle used under such conditions is shown in this paper. A compact car was equipped with a measurement system that is capable of determine the transientairflow around the vehicle and the vehicle’s actual driving state. A fixed driving route on public highways in southern Germany was driven several times, with that vehicle. The tests were conducted under consistent weather conditions and average wind velocities of 2-5 m/s. During the tests the transient incident flow and pressure distribution on the vehicle surface were measured and considered in this paper. Additionally, theground clearance occurring during the tests is discussed. The results of this paper contribute the characterization of the aerodynamic real-world driving conditions on public highways. Furthermore, the results aim to provide a reference case for the integrationof the real-world on-road driving conditions into CFD simulations and wind tunnel experiments.

Item URL in elib:https://elib.dlr.de/136700/
Document Type:Conference or Workshop Item (Speech)
Title:Characterization of the Transient Airflow Around a Vehicle on Public Highways
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Jessing, ChristophUniversität Stuttgart, IVKUNSPECIFIED
Wilhelmi, HenningHenning.Wilhelmi (at) dlr.dehttps://orcid.org/0000-0002-0086-287X
Wittmeier, FelixFKFS StuttgartUNSPECIFIED
Dillmann, AndreasAndreas.Dillmann (at) dlr.deUNSPECIFIED
Wiedemann, JochenFKFS StuttgartUNSPECIFIED
Date:October 2019
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 1-24
Status:Published
Keywords:on-road, measurements, aerodynamics, instationary flow, unsteady flow, FAT
Event Title:12th FKFS Conference
Event Location:Stuttgart, Deutschland
Event Type:international Conference
Event Dates:1.-2. Okt. 2019
Organizer:FKFS Stuttgart
HGF - Research field:other
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:no assignment
DLR - Program:no assignment
DLR - Research theme (Project):no assignment
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Ground Vehicles
Institute for Aerodynamics and Flow Technology > Administration AS-GO
Deposited By: Wilhelmi, Henning
Deposited On:11 Nov 2020 13:20
Last Modified:11 Nov 2020 13:20

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