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Complementary Numerical and Experimental Data Analysis of the ETW Telfona Pathfinder Wing Transition Tests

Streit, Thomas and Horstmann, Karl Heinz and Schrauf, Géza and Hein, Stefan and Fey, Uwe and Egami, Yasuhiro and Perraud, Jean and Salah El Din, Itham and Cella, Ubaldo and Quest, Jürgen (2011) Complementary Numerical and Experimental Data Analysis of the ETW Telfona Pathfinder Wing Transition Tests. 49th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition, 4 - 7 January 2011, Orlando, Florida USA.

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Abstract

Within the European Project Telfona the Pathfinder Model was designed, analyzed numerically, constructed and tested with the aim of obtaining a laminar flow testing capability in the European Transonic Wind Tunnel (ETW). The model was designed for natural laminar flow (NLF) for transonic flow conditions with high Reynolds number. Results of pre-test numerical analysis demonstrated that the Pathfinder wing pressure distribution was adequate for providing calibration test points. The ETW tests provided pressure distribution data while transition positions were determined from images using the Cryogenic Temperature Sensitive Paint Method (cryoTSP). The evaluation of this data with several transition prediction tools was used to establish the transition N-factor values for ETW. In this work, after-test CFD solutions are obtained using numerical Navier-Stokes solutions. In the first part of this work, numerical results are given which verify the requirements of the Pathfinder wing as a calibration model. In the second part, it is shown that for selected flow conditions a good agreement is obtained between stability analysis based on experimental and numerical data. In the third part the correlation of experimental transition locations to critical N-factors is summarized for ETW Test Phases I and II. In the fourth part numerical analysis and experimental data are used complementarily.

Document Type:Conference or Workshop Item (Speech, Paper)
Additional Information:AIAA 2011-811
Title:Complementary Numerical and Experimental Data Analysis of the ETW Telfona Pathfinder Wing Transition Tests
Authors:
AuthorsInstitution or Email of Authors
Streit, Thomasth.streit@dlr.de
Horstmann, Karl HeinzDLR
Schrauf, GézaAirbus
Hein, StefanDLR
Fey, UweDLR
Egami, YasuhiroDLR, Japan Science and Technology Corporation, Kawaguchi, Saitama, Japan
Perraud, JeanOnera
Salah El Din, IthamOnera
Cella, UbaldoPiaggio Aero Industries
Quest, JürgenETW
Date:January 2011
Status:Published
Keywords:laminar-turbulent transition, wind tunnel experiment (ETW), TELFONA, natural laminar flow, RANS solutions, critical N-factors
Event Title:49th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition
Event Location:Orlando, Florida USA
Event Type:international Conference
Event Dates:4 - 7 January 2011
Organizer:AIAA
HGF - Research field:Aeronautics, Space and Transport
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 > Transport Aircraft
Institute of Aerodynamics and Flow Technology > Experimental Methods
Deposited By: Dr.rer.nat. Thomas Streit
Deposited On:24 Jan 2012 10:07
Last Modified:12 Dec 2013 21:35

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