Salvi, Ciro und Gülhan, Ali (2025) PIV in the vicinity of cork samples in particle-laden high-enthalpy flow. Experiments in Fluids, 66 (160). Springer Nature. doi: 10.1007/s00348-025-04083-0. ISSN 0723-4864.
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Kurzfassung
This research aims at analysing the particle-laden flow of the high-enthalpy wind tunnel L2K, which is used to characterise the impact of dust particles on the recession behaviour of thermal protection systems during Martian entry flight. In the tests, a slightly simplified Martian atmosphere (97\% CO2 and 3\% N2) is used. The high-enthalpy flow is loaded with micrometric particles of magnesium oxide. Several samples for stagnation point tests made of P50 cork are positioned inside the particle-laden flow. The particles’ mean velocity is measured at the stagnation point of the probe in a region of interest that includes the free stream and the shock layer, with a 2D-2C particle image velocimetry (PIV) system. Several particle flow features are observed, such as the particle’s steep velocity gradient across the shock, the shock layer, and a counter-fow that might be caused by outgassing and rebounded particles. Average particle velocities ranging from 0 to 2100 m/s are measured and compared with the numerical simulation of the wind tunnel’s particle-free fow. A discussion on particle agglomeration due to melting is reported, and the importance of considering this efect for the simulation of atmospheric entry in particle-laden atmospheres is highlighted. Particles are collected with double-sided copper tape on a cooled probe and analysed with a scanning electron microscope (SEM) and with energy-dispersive X-ray spectroscopy (EDX), to characterize their morphological change during their residence time in the wind tunnel flow.
elib-URL des Eintrags: | https://elib.dlr.de/212548/ | ||||||||||||
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Dokumentart: | Zeitschriftenbeitrag | ||||||||||||
Titel: | PIV in the vicinity of cork samples in particle-laden high-enthalpy flow | ||||||||||||
Autoren: |
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Datum: | 2025 | ||||||||||||
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: | 66 | ||||||||||||
DOI: | 10.1007/s00348-025-04083-0 | ||||||||||||
Verlag: | Springer Nature | ||||||||||||
ISSN: | 0723-4864 | ||||||||||||
Status: | veröffentlicht | ||||||||||||
Stichwörter: | PIV, Velocimetry, SEM, EDX, Non Intrusive, Hypersonic, High Enthalpy, Arc-Heated Wind Tunnel, Mars, Dust, Particles, cork, P50 | ||||||||||||
HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||||||
HGF - Programm: | Raumfahrt | ||||||||||||
HGF - Programmthema: | keine Zuordnung | ||||||||||||
DLR - Schwerpunkt: | Raumfahrt | ||||||||||||
DLR - Forschungsgebiet: | R - keine Zuordnung | ||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | R - keine Zuordnung | ||||||||||||
Standort: | Köln-Porz | ||||||||||||
Institute & Einrichtungen: | Institut für Aerodynamik und Strömungstechnik > Über- und Hyperschalltechnologien, KP | ||||||||||||
Hinterlegt von: | Salvi, Ciro | ||||||||||||
Hinterlegt am: | 12 Sep 2025 12:47 | ||||||||||||
Letzte Änderung: | 12 Sep 2025 12:47 |
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