Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Steffen Risius"'
Publikováno v:
IUTAM Laminar-Turbulent Transition ISBN: 9783030679019
In the presence of surface imperfections, the extent of the laminar flow regions on natural laminar flow (NLF) aircraft components can be significantly reduced, as compared to design. The present work focuses on surface bumps, which can occur, e.g.,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1ac647ad7aca48b10961bd4275c26f05
https://doi.org/10.1007/978-3-030-67902-6_13
https://doi.org/10.1007/978-3-030-67902-6_13
Autor:
Tianshu Liu, Steffen Risius
Publikováno v:
International Journal of Heat and Mass Transfer. 140:420-425
This work incorporates in-situ calibration into the analytical inverse heat transfer solution for a finite base in temperature-sensitive-paint (TSP) measurements in high-enthalpy short-duration hypersonic wind tunnels. The thermal penetration paramet
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6994e48713aa0639f3a74ed35a889999
https://doi.org/10.1016/j.ijheatmasstransfer.2019.06.021
https://doi.org/10.1016/j.ijheatmasstransfer.2019.06.021
This work presents a method to automatically detect boundary-layer transition on thermographic images of aerodynamic surfaces, acquired using the temperature-sensitive paint measurement technique. It is applied to surface temperature distributions ma
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2aeed90fb1116f40732bd23bc8a97861
https://elib.dlr.de/142032/
https://elib.dlr.de/142032/
Publikováno v:
Notes on Numerical Fluid Mechanics and Multidisciplinary Design ISBN: 9783030252526
The effect on transition of a non-adiabatic surface was systematically studied in the present experimental work in combination with the influence of variations in Mach number and pressure gradient. The investigations were carried out in a (quasi-) tw
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::71034364e4a2ef8cbf00c44242bab731
https://elib.dlr.de/122990/
https://elib.dlr.de/122990/
Publikováno v:
Notes on Numerical Fluid Mechanics and Multidisciplinary Design ISBN: 9783030252526
The influence of suction on gap- and step-induced boundary-layer transition was investigated experimentally and systematically for large chord Reynolds numbers (up to \(16 \times 10^{6}\)) and various pressure gradients at Mach number 0.6. The experi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b3d47c58441c496089c819142825a84b
https://elib.dlr.de/122973/
https://elib.dlr.de/122973/
The influence of suction on step-induced boundary-layer transition has been experimentally investigated in the Cryogenic Ludwieg-Tube Goettingen at large chord Reynolds numbers (up to 16 · 10 6 ), Mach numbers from 0.35 to 0.77 and various streamwis
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a52df0a104de5ccc37ef3c1b4ec0a9c7
https://doi.org/10.1016/j.expthermflusci.2019.109842
https://doi.org/10.1016/j.expthermflusci.2019.109842
Autor:
S. Koch, Steffen Risius, Marco Costantini, Carsten Fuchs, U. Gerhard, Christian Klein, S. Hein
The influence of surface bumps on boundary-layer transition was experimentally investigated in the present work. The experiments were conducted in a (quasi-) two-dimensional flow at low to high subsonic Mach numbers and chord Reynolds numbers up to 1
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::73575006ea38a84b53f3fe93b646a5c2
https://doi.org/10.1016/j.expthermflusci.2019.04.027
https://doi.org/10.1016/j.expthermflusci.2019.04.027
Autor:
Eberhard Bodenschatz, T. Schmeissner, Szymon P. Malinowski, Jakub L. Nowak, Heng-Dong Xi, Haitao Xu, Raymond A. Shaw, Holger Siebert, Steffen Risius, Katarzyna Karpinska, Jonathan F. E. Bodenschatz
Publikováno v:
Atmospheric Chemistry and Physics, Vol 19, Pp 4991-5003 (2019)
The phenomenon of “cloud voids”, i.e., elongated volumes inside a cloud that are devoid of droplets, was observed with laser sheet photography in clouds at a mountain-top station. Two experimental cases, similar in turbulence conditions yet with
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6474caf1efc0cb95a6f15365de0c2833
https://www.atmos-chem-phys.net/19/4991/2019/
https://www.atmos-chem-phys.net/19/4991/2019/
Autor:
Ann K. Hensch, Christian Klein, Peter Guntermann, Roberto Longo, Sven Schaber, Jürgen Quest, Steffen Risius, Patrick Okfen
The application of Hybrid Laminar Flow Control (HLFC) by suction of the boundary layer has the potential to delay the location of laminar-turbulent transition and, hence, reduce the drag caused by skin friction. Up to now most of the research on HLFC
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::913e75a039cf4a0a8045ef3406c9f566
https://elib.dlr.de/126998/
https://elib.dlr.de/126998/
Autor:
Katarzyna Karpińska, Jonathan F. E. Bodenschatz, Szymon P. Malinowski, Jakub L. Nowak, Steffen Risius, Tina Schmeissner, Raymond A. Shaw, Holger Siebert, Hengdong Xi, Haitao Xu, Eberhard Bodenschatz
The phenomenon of cloud voids, i.e., elongated volumes inside a cloud that are devoid of droplets, was observed with laser sheet photography in clouds at a mountain-top station. Two experimental cases, similar in turbulence conditions yet with divers
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5307f0c375cafa43e840b51e2df51e3b
https://www.atmos-chem-phys-discuss.net/acp-2018-1049/
https://www.atmos-chem-phys-discuss.net/acp-2018-1049/