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PIV in the vicinity of cork samples in particle-laden high-enthalpy flow

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/
Dokumentart:Zeitschriftenbeitrag
Titel:PIV in the vicinity of cork samples in particle-laden high-enthalpy flow
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Salvi, Cirociro.salvi (at) dlr.dehttps://orcid.org/0000-0002-4185-1042191727128
Gülhan, Aliali.guelhan (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
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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