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An alternative wind tunnel data correction based on CFD and experimental data in the transonic flow regime

Bertram, Anna and Görtz, Stefan and Hoffmann, Nils and Gebbink, Roy and Janssen, Stevie Ray (2021) An alternative wind tunnel data correction based on CFD and experimental data in the transonic flow regime. In: AIAA Aviation 2021 Forum. AIAA. AIAA Aviation 2021 Forum, 02.-06. Aug. 2021, Virtual event. doi: 10.2514/6.2021-2982.

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Official URL: https://arc.aiaa.org/doi/10.2514/6.2021-2982

Abstract

This paper presents an alternative approach to correct wind tunnel data through the use of CFD solutions. The correction is based on the difference between the measured pressures in the wind tunnel and the pressures predicted with CFD in free flow condition, at angles of attack and Mach numbers surround the wind tunnel data point. Optimization is used to find the combination of angle of attack and Mach number that minimizes the difference between the measured pressures and the predicted pressures. A surrogate model is used to approximate the CFD data to enhance the computational efficiency of the approach. The result of the optimization is a corrected angle of attack and Mach number that corresponds to a pressure distribution under free flight conditions that best fits the wind tunnel experiment in terms of the objective function used. It is demonstrated that when all wing pressures are used in the objective function the resulting corrections are in agreement with wall interference corrections as predicted with a wall pressure signature method.

Item URL in elib:https://elib.dlr.de/144592/
Document Type:Conference or Workshop Item (Speech)
Title:An alternative wind tunnel data correction based on CFD and experimental data in the transonic flow regime
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Bertram, AnnaAnna.Bertram (at) dlr.dehttps://orcid.org/0000-0002-2757-670X
Görtz, StefanStefan.Goertz (at) dlr.deUNSPECIFIED
Hoffmann, NilsNils.Hoffmann (at) dlr.deUNSPECIFIED
Gebbink, Royroy.gebbink (at) dnw.aeroUNSPECIFIED
Janssen, Stevie RayStevie.Ray.Janssen (at) nlr.nlUNSPECIFIED
Date:August 2021
Journal or Publication Title:AIAA Aviation 2021 Forum
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
DOI :10.2514/6.2021-2982
Publisher:AIAA
Series Name:AIAA Aviation Forum
Status:Published
Keywords:Wind tunnel correction, wall interference, CFD, wind tunnel tests
Event Title:AIAA Aviation 2021 Forum
Event Location:Virtual event
Event Type:international Conference
Event Dates:02.-06. Aug. 2021
Organizer:AIAA
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Efficient Vehicle
DLR - Research area:Aeronautics
DLR - Program:L EV - Efficient Vehicle
DLR - Research theme (Project):L - Digital Technologies
Location: Braunschweig
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > CASE, BS
Deposited By: Bertram, Dr. Anna
Deposited On:19 Oct 2021 08:57
Last Modified:19 Oct 2021 08:57

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