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How angular-momentum flux controls Francis turbine full-load surge

Autor: P K Dörfler, J Wack, S Riedelbauch

Publikováno v: IOP Conference Series: Earth and Environmental Science. 1079:012050

Hydropower plants equipped with Francis turbines may enter unstable conditions at high turbine discharge [13], with strong pulsations of power output and internal pressure. The cause are oscillations of a vapor-filled cavity in the vortex flow downst

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::026a516ef769f4ac688f6535a4a43e21
https://doi.org/10.1088/1755-1315/1079/1/012050

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Numerical investigation of the impact of cavitation on the pressure fluctuations in a Francis turbine at deep part load conditions

Autor: J Wack, M Grübel, P Conrad, F Von Locquenghien, R Jester-Zürker, S Riedelbauch

Publikováno v: IOP Conference Series: Earth and Environmental Science. 1079:012044

Hydropower plants can play an important role to stabilize the electrical grid when the share of volatile renewable energies increases. This goes hand in hand with a more flexible operation of the turbines and longer operation in off-design operating

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0e41a8e2baaa6e27fbbcce4b385b299a
https://doi.org/10.1088/1755-1315/1079/1/012044

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Akademický článek

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The impact of isocentric shifts on delivery accuracy during the irradiation of small cerebral targets-Quantification and possible corrections

Autor: Linda J, Wack, Florian, Exner, Sonja, Wegener, Otto A, Sauer

Publikováno v: Journal of Applied Clinical Medical Physics

Purpose To assess the impact of isocenter shifts due to linac gantry and table rotation during cranial stereotactic radiosurgery on D98, target volume coverage (TVC), conformity (CI), and gradient index (GI). Methods Winston‐Lutz (WL) checks were p

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::cbf0aa58b86e147eacc1fea3c81e0a16
https://pubmed.ncbi.nlm.nih.gov/32196950

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Simulation of the structural behavior of a Francis runner in Deep Part Load Operation

Autor: Philipp Conrad, J Wack, S Riedelbauch, F von Locquenghien, R Jester-Zürker

Publikováno v: IOP Conference Series: Earth and Environmental Science. 774:012143

With the need for flexible operation, Francis runners are exposed to various operating conditions beyond the traditional operating range. These machines have to be designed for long time Part Load Operation in order to meet hydraulic and structural r

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f97bb3e66b442cbf1e666f513837dd83
https://doi.org/10.1088/1755-1315/774/1/012143

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On the Physical Mechanisms that Cause the Full Load Instability in Francis Turbines

Autor: S Riedelbauch, J Wack

Publikováno v: IOP Conference Series: Earth and Environmental Science. 774:012022

Today, hydropower receives increased attention for the safe integration of volatile renewable energies as it is able to stabilize the electrical grid. For that reason, turbines are more often operated at off-design conditions with the drawback that u

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::24392b21853e35372efdd738277e3d49
https://doi.org/10.1088/1755-1315/774/1/012022

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A Turbulence Model Assessment for Deep Part Load Conditions of a Francis Turbine

Autor: S Riedelbauch, J Beck, R Jester-Zürker, J Wack, Philipp Conrad, F von Locquenghien

Publikováno v: IOP Conference Series: Earth and Environmental Science. 774:012072

Today, hydropower plants received increased attention as they have the ability to stabilize the electrical grid. However, this is accompanied by more start-stop sequences as well as operation in off-design conditions. One big task is to develop impro

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7604d90cef5cf0b0db5c9b706a151197
https://doi.org/10.1088/1755-1315/774/1/012072

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Comparison of [18F]-FMISO, [18F]-FAZA and [18F]-HX4 for PET imaging of hypoxia - a simulation study

Autor: Daniel Zips, Catharina M.L. Zegers, Linda J Wack, Daniela Thorwarth, Wouter van Elmpt, Esther G.C. Troost, David Mönnich

Publikováno v: Acta Oncologica, 54(9), 1370-1377. Routledge/Taylor & Francis Group

To investigate the effect of hypoxia tracer properties on positron emission tomography (PET) image quality for three tracers [18F]-fluoromisonidazole (FMISO), [18F]-fluoroazomycinarabinoside (FAZA) and [18F]-flortanidazole (HX4), using mathematical s

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::23db374cb0821097daa52b66efeb411b
https://doi.org/10.3109/0284186x.2015.1067721

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Correlation of FMISO simulations with pimonidazole-stained tumor xenografts: A question of O2 consumption?

Autor: L J, Wack, D, Mönnich, A, Yaromina, D, Zips, M, Baumann, D, Thorwarth

Publikováno v: Medical physics. 43(7)

To compare a dedicated simulation model for hypoxia PET against tumor microsections stained for different parameters of the tumor microenvironment. The model can readily be adapted to a variety of conditions, such as different human head and neck squ

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::8fd4e258362104ea0975d4253308911b
https://pubmed.ncbi.nlm.nih.gov/27370131

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