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Transonic High Reynolds Number Transition Experiments in the ETW Cryogenic Wind Tunnel

Perraud, Jean and Archambaud, J.P. and Schrauf, Géza and Donelli, Raffaele and Hanifi, A. and Quest, Jürgen and Streit, Thomas and Hein, Stefan and Fey, Uwe and Egami, Yasuhiro (2010) Transonic High Reynolds Number Transition Experiments in the ETW Cryogenic Wind Tunnel. 48th AIAA Aerospace Sciences Meeting, 04.-07. Jan. 2010, Orlando, Fl., USA. ISBN 9781600867392.

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Official URL: http://www. aiaa.com

Abstract

With the goal of studying Natural Laminar Flow (NLF) wings for future ‘green’ transport aircraft, the aim of the European Research Project TELFONA is to develop and demonstrate the possibility of testing full aircraft models at large Reynolds numbers in the cryogenic Wind Tunnel ETW, with direct measurements of total drag. Two main steps were defined, first the design and test of a ‘calibration’ model, to be followed by a realistic transport aircraft model. This paper is dedicated to the first one, which was especially designed in order to allow a calibration of the Wind Tunnel transition N-factors at large values of the chord Reynolds number typical of testing in ETW. In order to do so, the wing shape was optimized so that TS and CF N-factors would show a monotonous growth over the longest possible distance. Apart from classical aerodynamic forces, two lines of pressure taps, as well as four patches of a two components cryogenic Temperature- Sensitive Paint (cryoTSP), were installed on both sides of each wing. Model surface temperatures were recorded by several CCD cameras as the intensity of light emission from the TSP, which has to be excited by suitable light sources. After the tests, stability analysis was applied in order to ‘calibrate’ the various models currently used by research labs in Europe, involving a wide range of approaches, including simplified database, local linear and non local linear stability approaches. The paper will describe these different phases of the activities, from design, testing and numerical validation, with a focus on the validation and calibration of transition prediction tools. Examples of numerical results obtained by the project partners will be confronted to the experiments.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:Transonic High Reynolds Number Transition Experiments in the ETW Cryogenic Wind Tunnel
Authors:
AuthorsInstitution or Email of Authors
Perraud, JeanONERA, Toulouse, France
Archambaud, J.P.ONERA, Toulouse, France
Schrauf, GézaAirbus, Bremen
Donelli, RaffaeleCIRA, Capua
Hanifi, A.FOI, Stockholm, Sweden
Quest, JürgenETW
Streit, ThomasUNSPECIFIED
Hein, StefanUNSPECIFIED
Fey, UweUNSPECIFIED
Egami, YasuhiroJapan Science and Technology Corporation, Kawaguchi, Saitama, Japan
Date:2010
Volume:Vol. 15, 1
Series Name:AIAA Conference Proceedings on DVD
ISBN:9781600867392
Status:Published
Keywords:Natural Laminar Flow (NLF), cryogenic Temperature- Sensitive Paint (cryoTSP), Transonic High Reynolds Number
Event Title:48th AIAA Aerospace Sciences Meeting
Event Location:Orlando, Fl., USA
Event Type:international Conference
Event Dates:04.-07. Jan. 2010
Organizer:AIAA
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Flight Physics
Location: Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Helicopters
Institute of Aerodynamics and Flow Technology > Experimental Methods
Institute of Aerodynamics and Flow Technology > Configuration Design
Deposited By: Ilka Micknaus
Deposited On:23 Feb 2010 10:38
Last Modified:25 Feb 2011 12:12

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