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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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)|
|Title:||TSP measurements in the ETW|
|In ISI Web of Science:||No|
|Page Range:||p. 1|
|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|
|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|
|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 18:31|
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