Singh, Piyush und Schmidt, Florian und Wild, Jochen und Riemenschneider, Johannes und Peinke, Joachim und Hölling, Michael (2024) Experimental Validation of a Passive-Adaptive Slat Concept and Characterization under Sinusoidal Fluctuations in the Angle of Attack. Aerospace, 11 (5), Seite 353. Multidisciplinary Digital Publishing Institute (MDPI). doi: 10.3390/aerospace11050353. ISSN 2226-4310.
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Kurzfassung
This article presents an experimental investigation of a passive-adaptive slat concept, an aerodynamic control mechanism aimed at avoiding separation in the inwards region of a horizontal axis wind turbine blade. The passive-adaptive slat is designed to autonomously adjust its position due to the aerodynamic forces acting on it, without the need of any active control system or external power source. The slat opens when the angle of attack increases beyond a certain threshold so that stall is delayed and closes for smaller angles of attack to increase the lift-to-drag ratio of the airfoil. A thorough aerodynamic characterisation of the passive-adaptive slat is performed in the wind tunnel followed by testing it under different sinusoidal inflows generated by a 2D active grid. It is observed that the slat system is able to leverage the advantages of both a clean airfoil and an airfoil with a fixed slat. It has the capability of delaying stalls for higher angles of attack, as well as having higher lift-to-drag ratio for lower angles of attack. It is also observed that, for fluctuating inflow, the passive-adaptive slat is able to achieve similar mean lift values as an airfoil with fixed slat while showing significant reduction in the lift fluctuations.
elib-URL des Eintrags: | https://elib.dlr.de/204771/ | ||||||||||||||||||||||||||||
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Dokumentart: | Zeitschriftenbeitrag | ||||||||||||||||||||||||||||
Titel: | Experimental Validation of a Passive-Adaptive Slat Concept and Characterization under Sinusoidal Fluctuations in the Angle of Attack | ||||||||||||||||||||||||||||
Autoren: |
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Datum: | Mai 2024 | ||||||||||||||||||||||||||||
Erschienen in: | Aerospace | ||||||||||||||||||||||||||||
Referierte Publikation: | Ja | ||||||||||||||||||||||||||||
Open Access: | Ja | ||||||||||||||||||||||||||||
Gold Open Access: | Ja | ||||||||||||||||||||||||||||
In SCOPUS: | Ja | ||||||||||||||||||||||||||||
In ISI Web of Science: | Ja | ||||||||||||||||||||||||||||
Band: | 11 | ||||||||||||||||||||||||||||
DOI: | 10.3390/aerospace11050353 | ||||||||||||||||||||||||||||
Seitenbereich: | Seite 353 | ||||||||||||||||||||||||||||
Verlag: | Multidisciplinary Digital Publishing Institute (MDPI) | ||||||||||||||||||||||||||||
ISSN: | 2226-4310 | ||||||||||||||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||||||||||||||
Stichwörter: | active grid; blade unsteady load; leading edge slat; load control; passive-adaptive slat; turbulence | ||||||||||||||||||||||||||||
HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||||||||||||||||||||||
HGF - Programm: | Luftfahrt | ||||||||||||||||||||||||||||
HGF - Programmthema: | Effizientes Luftfahrzeug | ||||||||||||||||||||||||||||
DLR - Schwerpunkt: | Luftfahrt | ||||||||||||||||||||||||||||
DLR - Forschungsgebiet: | L EV - Effizientes Luftfahrzeug | ||||||||||||||||||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | L - Virtuelles Flugzeug und Validierung | ||||||||||||||||||||||||||||
Standort: | Braunschweig | ||||||||||||||||||||||||||||
Institute & Einrichtungen: | Institut für Aerodynamik und Strömungstechnik > Transportflugzeuge Institut für Systemleichtbau > Leichtbauinnovation Institut für Systemleichtbau > Adaptronik | ||||||||||||||||||||||||||||
Hinterlegt von: | Stanitzek, Silke | ||||||||||||||||||||||||||||
Hinterlegt am: | 17 Jun 2024 08:54 | ||||||||||||||||||||||||||||
Letzte Änderung: | 17 Jun 2024 08:54 |
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