Zobrazeno 1 - 10
of 113
pro vyhledávání: '"Kilian Oberleithner"'
Publikováno v:
Fluids, Vol 9, Iss 4, p 88 (2024)
The purpose of this work is to explore the potential of deep reinforcement learning (DRL) as a black-box optimizer for turbulence model identification. For this, we consider a Reynolds-averaged Navier–Stokes (RANS) closure model of a round turbulen
Externí odkaz:
https://doaj.org/article/7318f368e8df451c92136205c6c8c7d4
Autor:
Sirko Bartholomay, Sascha Krumbein, Sebastian Perez‐Becker, Rodrigo Soto‐Valle, Christian N. Nayeri, Christian O. Paschereit, Kilian Oberleithner
Publikováno v:
Wind Energy, Vol 26, Iss 2, Pp 201-227 (2023)
Abstract This paper presents an experimental assessment of a blended fatigue‐extreme controller for load control employing trailing edge flaps on a lab‐scale wind turbine. The controller blends between a repetitive model predictive controller tha
Externí odkaz:
https://doaj.org/article/f4bcb4019e99486e83d6f53770ef70b2
Autor:
Sirko Bartholomay, Sascha Krumbein, Victoria Deichmann, Maik Gentsch, Sebastian Perez‐Becker, Rodrigo Soto‐Valle, David Holst, Christian N. Nayeri, Christian O. Paschereit, Kilian Oberleithner
Publikováno v:
Wind Energy, Vol 25, Iss 7, Pp 1290-1308 (2022)
Summary This paper presents the results of an advanced control strategy that employs active trailing edge flaps to reduce the fatigue loads of an experimental wind turbine. The strategy, called repetitive model predictive control, is a multiple‐inp
Externí odkaz:
https://doaj.org/article/711be19d06384fcbb9d5159c64f5afee
Autor:
Marc Olbrich, Andrew Hunt, Terri Leonard, Dennis S. van Putten, Markus Bär, Kilian Oberleithner, Sonja Schmelter
Publikováno v:
Measurement: Sensors, Vol 18, Iss , Pp 100222- (2021)
In industrial operations, the slug flow pattern can lead to serious problems, that are mostly caused by the liquid slugs of the flow. Hence, a detailed description of the slug flow pattern is of special interest. In this context, the temporal flow ch
Externí odkaz:
https://doaj.org/article/44870abb63b2499cb94465c5ad58842b
Autor:
Ivan Litvinov, Dmitriy Sharaborin, Evgeny Gorelikov, Vladimir Dulin, Sergey Shtork, Sergey Alekseenko, Kilian Oberleithner
Publikováno v:
Applied Sciences, Vol 12, Iss 10, p 5127 (2022)
We report on the experimental study of a precessing vortex core (PVC) in an air model of a Francis turbine. The focus is placed on the modal decomposition of the PVC that occurs in the draft tube of the model turbine for a range of operation conditio
Externí odkaz:
https://doaj.org/article/dd552f733b6e46f08fd4d292505d2e8c
Publikováno v:
Fluids, Vol 6, Iss 3, p 128 (2021)
Fluidic actuators are designed to control the oscillatory helical mode, called a precessing vortex core (PVC), which is often observed in gas turbine combustors. The PVC induces large-scale hydrodynamic coherent structures, which can considerably aff
Externí odkaz:
https://doaj.org/article/e188a55bfa8c40908315e7776d8720f7
Publikováno v:
Journal of Fluid Science and Technology, Vol 9, Iss 3, Pp JFST0024-JFST0024 (2014)
This paper presents recent research activities on coherent structures in combustor flows employing linear hydrodynamic stability theory. Large-scale coherent structures play an important role in swirling combustor flows. On the one hand isothermal sw
Externí odkaz:
https://doaj.org/article/38640c455992435aa672b72c7e382cc8
Publikováno v:
OpenFOAM® Journal. 3:49-65
In this study, the performance of several RANS and hybrid LES/RANS turbulence models along with different CFD solvers (ANSYS Fluent, OpenFOAM and RapidCFD) is tested in terms of their ability to reproduce the flow downstream of a 90° pipe bend. The
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::529d504310f32fcb25ce3a115cc61f03
https://doi.org/10.51560/ofj.v3.36
https://doi.org/10.51560/ofj.v3.36
Autor:
Sirko Bartholomay, Sascha Krumbein, Sebastian Perez‐Becker, Rodrigo Soto‐Valle, Christian N. Nayeri, Christian O. Paschereit, Kilian Oberleithner
Publikováno v:
Wind Energy. 26:201-227
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7518318a5195934254471a57c96a1bfd
https://doi.org/10.1002/we.2795
https://doi.org/10.1002/we.2795
Publikováno v:
International Journal of Hydrogen Energy.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::611c7edbce621278b3d3692d2cb07b27
https://doi.org/10.1016/j.ijhydene.2023.03.073
https://doi.org/10.1016/j.ijhydene.2023.03.073