Weiss, Armin und Geisler, Reinhard und Schwermer, Till und Yorita, Daisuke und Henne, Ulrich und Klein, Christian und Raffel, Markus (2017) Single-shot pressure-sensitive paint lifetime measurements on fast rotating blades using an optimized double shutter technique. Experiments in Fluids, 58 (120), Seiten 1-20. Springer Nature. doi: 10.1007/s00348-017-2400-4. ISSN 0723-4864.
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Offizielle URL: https://doi.org/10.1007/s00348-017-2400-4
Kurzfassung
A pressure-sensitive paint (PSP) system is presented to measure global surface pressures on fast rotating blades. lt is dedicated to solve the problem of blurred image data employing the single-shot lifetime method. The efficient blur reduction capability of an optimized double shutter imaging technique is demonstrated omitting error-prone post-processing or laborious de-rotation setups. The system is applied on Mach-scaled DSA-9A helicopter blades in climb at various collective pitch settings and blade tip Mach- and chord Reynolds numbers (Mtip = 0.29-0.57; Retip = 4.63-9.26x105). Temperature effects in the PSP are corrected by a theoretical approximation validated against measured temperatures using temperature-sensitive paint (TSP) on a separate blade. Ensemble averaged PSP-results are comparable to pressure-tap data on the same blade to within 250 Pa. Resulting pressure maps on the blade suction side reveal spatially high resolved flow features such as the leading edge suction peak, footprints of blade-tip vortices and evidence of laminar-turbulent boundary-layer (BL) transition. The findings are validated by a separately conducted BL transition measurement by means of TSP and numerical simulations using a coupled Euler/ boundary-layer code. Moreover, the principal ability of the single-shot technique to capture unsteady flow phenomena is stressed revealing three dimensional pressure fluctuations at stall.
elib-URL des Eintrags: | https://elib.dlr.de/116942/ | ||||||||||||||||||||||||||||||||
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Dokumentart: | Zeitschriftenbeitrag | ||||||||||||||||||||||||||||||||
Zusätzliche Informationen: | Publishcd online: 18 August 2017; Vol. 58, Issue 9; Article 120 | ||||||||||||||||||||||||||||||||
Titel: | Single-shot pressure-sensitive paint lifetime measurements on fast rotating blades using an optimized double shutter technique | ||||||||||||||||||||||||||||||||
Autoren: |
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Datum: | 18 August 2017 | ||||||||||||||||||||||||||||||||
Erschienen in: | Experiments in Fluids | ||||||||||||||||||||||||||||||||
Referierte Publikation: | Ja | ||||||||||||||||||||||||||||||||
Open Access: | Ja | ||||||||||||||||||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||||||||||||||||||
In SCOPUS: | Ja | ||||||||||||||||||||||||||||||||
In ISI Web of Science: | Ja | ||||||||||||||||||||||||||||||||
Band: | 58 | ||||||||||||||||||||||||||||||||
DOI: | 10.1007/s00348-017-2400-4 | ||||||||||||||||||||||||||||||||
Seitenbereich: | Seiten 1-20 | ||||||||||||||||||||||||||||||||
Herausgeber: |
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Verlag: | Springer Nature | ||||||||||||||||||||||||||||||||
ISSN: | 0723-4864 | ||||||||||||||||||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||||||||||||||||||
Stichwörter: | pressure-sensitive paint; single-shot lifetime technique; image blur; roter aerodynamics | ||||||||||||||||||||||||||||||||
HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||||||||||||||||||||||||||
HGF - Programm: | Luftfahrt | ||||||||||||||||||||||||||||||||
HGF - Programmthema: | Flugzeuge | ||||||||||||||||||||||||||||||||
DLR - Schwerpunkt: | Luftfahrt | ||||||||||||||||||||||||||||||||
DLR - Forschungsgebiet: | L AR - Aircraft Research | ||||||||||||||||||||||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | L - Simulation und Validierung (alt) | ||||||||||||||||||||||||||||||||
Standort: | Göttingen | ||||||||||||||||||||||||||||||||
Institute & Einrichtungen: | Institut für Aerodynamik und Strömungstechnik > Experimentelle Verfahren, GO Institut für Aerodynamik und Strömungstechnik > Hubschrauber, GO | ||||||||||||||||||||||||||||||||
Hinterlegt von: | Bachmann, Barbara | ||||||||||||||||||||||||||||||||
Hinterlegt am: | 13 Dez 2017 14:38 | ||||||||||||||||||||||||||||||||
Letzte Änderung: | 02 Nov 2023 13:28 |
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