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Calibration of CFD Methods for Industrial estimations of Aerodynamic Drag of Ground Based Vehicles under unsteady on-flow conditions

Weinman, Keith and Müller, Tobias Simon and Fey, Uwe and Ehrenfried, Klaus and Wagner, Claus (2023) Calibration of CFD Methods for Industrial estimations of Aerodynamic Drag of Ground Based Vehicles under unsteady on-flow conditions. In: 21. STAB-Workshop - Jahresbericht 2023, pp. 24-25. 21. STAB - Workshop 2023, 2023-11-07 - 2023-11-08, Göttingen, Germany.

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Official URL: https://www.dlr.de/as/Portaldata/5/Resources/dokumente/veranstaltungen/stab_workshop/Jahresbericht2023.pdf

Abstract

We report on the continuation of work presented during the STAB 2022 conference. In the STAB 2022 work it is noted that changes in measured and computed drag match experiments closely if differences between a reference CFD and and a CFD result with small modifications to the computational problem are compared. Using this observation as a prognostic tool it was deduced that inclusion of active/passive suction for boundary layer (BL) control should reduce differences between CFD and measure sufficiently so that the CFD results should more closely replicate the measurements for drag obtained in the SWG tunnel. Inclusion of the aforementioned BL control methods into the CFD model is shown, in the current presentation, to improve the fidelity of the CFD results. Examination of the local flow field about the model reinforce the importance of properly modeling the interaction between the onflow and the train head. For steady onflow conditions the response of the local flow field is localized to the train head and to the initial part of the train underflow.

Item URL in elib:https://elib.dlr.de/199659/
Document Type:Conference or Workshop Item (Speech)
Title:Calibration of CFD Methods for Industrial estimations of Aerodynamic Drag of Ground Based Vehicles under unsteady on-flow conditions
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Weinman, KeithUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Müller, Tobias SimonUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fey, UweUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ehrenfried, KlausUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wagner, ClausUNSPECIFIEDhttps://orcid.org/0000-0003-2273-0568UNSPECIFIED
Date:2023
Journal or Publication Title:21. STAB-Workshop - Jahresbericht 2023
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 24-25
Editors:
EditorsEmailEditor's ORCID iDORCID Put Code
UNSPECIFIEDSTABUNSPECIFIEDUNSPECIFIED
Series Name:Jahresbericht
Status:Published
Keywords:comparisons of Wind-tunnel measurements with CFD
Event Title:21. STAB - Workshop 2023
Event Location:Göttingen, Germany
Event Type:national Conference
Event Start Date:7 November 2023
Event End Date:8 November 2023
Organizer:STAB/DLR
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Road Transport
DLR - Research area:Transport
DLR - Program:V ST Straßenverkehr
DLR - Research theme (Project):V - FFAE - Fahrzeugkonzepte, Fahrzeugstruktur, Antriebsstrang und Energiemanagement
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Ground Vehicles
Deposited By: Müller, Tobias Simon
Deposited On:07 Dec 2023 13:19
Last Modified:24 Apr 2024 21:00

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