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Reattaching Flow Behind a Square Bar Investigated with Temperature-Sensitive Paint

Ost, Jonathan and Mäteling, Esther and Klein, Christian and Puckert, Dominik and Rist, Ulrich (2016) Reattaching Flow Behind a Square Bar Investigated with Temperature-Sensitive Paint. 20. DGLR-Fach-Symposium der STAB, 08.-09.11.2016, Braunschweig, Deutschland.

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Flow visualizations of a square bump were conducted by means of Temperature-Sensitive Paint (TSP) in the Laminarwasserkanal of the IAG (University Stuttgart). In the investigation laminar, transitional and turbulent reattachment of the flow is investigated with the Reynolds number Rekk spanning 127 ≤ Rekk ≤ 1898. The variation of flow separation, flow reattachment and impinging flow structures are well captured with the TSP technique. The TSP technique requires a temperature difference between model surface and flow, therefore a thin TSP-Element was especially designed to electrically heat the surface. At low Reynolds numbers the non-adiabatic wall causes significant buoyancy forces leading to constraints of the useful working range with TSP in the Laminarwasserkanal. The location shift of flow reattachment and the variation of the impinging flow structures to characterize the flow will be shown in the final paper. Furthermore, the influence of the temperature difference between model surface and fluid, which is required for the TSP method, will be addressed, especially for low Rekk at low flow speed.

Item URL in elib:https://elib.dlr.de/104734/
Document Type:Conference or Workshop Item (Speech)
Title:Reattaching Flow Behind a Square Bar Investigated with Temperature-Sensitive Paint
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Ost, Jonathanjonathan.ost (at) dlr.deUNSPECIFIED
Mäteling, EstherRWTH AachenUNSPECIFIED
Klein, Christianchristian.klein (at) dlr.deUNSPECIFIED
Puckert, DominikUniversität StuttgartUNSPECIFIED
Rist, UlrichUniversität StuttgartUNSPECIFIED
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:TSP, Reattaching Flow
Event Title:20. DGLR-Fach-Symposium der STAB
Event Location:Braunschweig, Deutschland
Event Type:national Conference
Event Dates:08.-09.11.2016
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation and Validation
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Experimental Methods
Deposited By: Bachmann, Barbara
Deposited On:16 Dec 2016 12:31
Last Modified:16 Dec 2016 12:31

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