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TSP measurements in the ETW

Egami, Yasuhiro and Fey, Uwe and Engler, Rolf H. (2004) TSP measurements in the ETW. DLR/ONERA - Annex II Meeting, 2004-04-06 - 2004-04-07, Köln (Germany).

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Abstract

The identification of laminar-turbulent boundary layer transition on models in cryogenic wind tunnels gives essential data for modern wing design. Among other techniques, transition detection can be done using IR cameras which show good results in ‘warm’ wind tunnels. In cryogenic testing the IR technique becomes more difficult to realize because of the reduction in radiated energy and the shift to longer wavelengths. Therefore, an IR camera operating for example at 120K shows low resolution and sensitivity and needs very sophisticated system due to the low temperature in the cryogenic wind tunnel. The temperature sensitive paint (TSP) technique has become a promising alternative here. This technique has been developed at NAL of Japan (present JAXA) since 1997. Some modifications of existing TSP formulations had to be undertaken to apply the technique to a large-sized cryogenic wind tunnel such as the European Transonic Windtunnel (ETW). For image and data acquisition, DLR’s mobile measurement system (which was developed for Pressure Sensitive Paint (PSP) measurements in “warm” wind tunnels) could be used but had to be adapted to the special conditions given in the ETW wind tunnel. The goals of the present study are the followings: One is to establish the transition detection technique using TSP in the ETW wind tunnel. Another is to check out the capability of DLR’s mobile PSP/TSP system for data acquisition and evaluation at cryogenic conditions in the ETW with respect to future PSP measurement in the ETW.

Document Type:Conference or Workshop Item (Speech)
Additional Information: LIDO-Berichtsjahr=2004,
Title:TSP measurements in the ETW
Authors:
AuthorsInstitution or Email of Authors
Egami, YasuhiroUNSPECIFIED
Fey, UweUNSPECIFIED
Engler, Rolf H.UNSPECIFIED
Date:2004
Refereed publication:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:p. 1
Status:Published
Keywords:Temperature Sensitive Paint (TSP), Cryogenic Wind Tunnel, Boundary layer transition detection
Event Title:DLR/ONERA - Annex II Meeting
Event Location:Köln (Germany)
Event Type:international Conference
Event Dates:2004-04-06 - 2004-04-07
Organizer:DLR/ONERA
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: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Experimental Methods
Deposited By: Ilka Micknaus
Deposited On:31 Jan 2006
Last Modified:14 Jan 2010 19:31

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