Zobrazeno 1 - 10
of 273
pro vyhledávání: '"P. Dahlhaug"'
Publikováno v:
Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine, Vol 31, Iss 1, Pp 1-10 (2023)
Abstract Background The Norwegian Trauma Registry (NTR) is designed to monitor and improve the quality and outcome of trauma care delivered by Norwegian trauma hospitals. Patient care is evaluated through specific quality indicators, which are constr
Externí odkaz:
https://doaj.org/article/ec63b071b7cf4dca9fe90dadb973ad16
Publikováno v:
Journal of Sustainable Development of Energy, Water and Environment Systems, Vol 10, Iss 3, Pp 1-16 (2022)
The complex geometry of Francis turbine components can be defined parametrically so that automatic optimization techniques based on parametrization can be used. This is convenient for a hydraulic redesign of individual turbine elements. Considering t
Externí odkaz:
https://doaj.org/article/b29235301c824be6ac8e8cb696a0a034
Autor:
Hong Wang, Shiqi (Shawn) Ou, Ole Gunnar Dahlhaug, Pål-Tore Storli, Hans Ivar Skjelbred, Ingrid Vilberg
Publikováno v:
Mathematics, Vol 11, Iss 18, p 4012 (2023)
In the development of a digital twin (DT) for hydropower turbines, dynamic modeling of the system (e.g., penstock, turbine, speed control) is crucial, along with all the necessary data interface, virtualization, and dashboard designs. Since the DT mu
Externí odkaz:
https://doaj.org/article/20f7ccf1bd0941a2951e6c4ddbb16765
Publikováno v:
Engineering Applications of Computational Fluid Mechanics, Vol 12, Iss 1, Pp 662-678 (2018)
Abrasive wear in the clearance gap of guide vanes (GVs) increases the gap size, which deteriorates the flow and causes loss of efficiency. This paper investigates the performance of a Francis turbine including erosion-induced clearance gaps on the GV
Externí odkaz:
https://doaj.org/article/b1793a9829dc4b1887d8d83dc1c819a5
Akademický článek
Tento výsledek nelze pro nepřihlášené uživatele zobrazit.
K zobrazení výsledku je třeba se přihlásit.
K zobrazení výsledku je třeba se přihlásit.
Akademický článek
Tento výsledek nelze pro nepřihlášené uživatele zobrazit.
K zobrazení výsledku je třeba se přihlásit.
K zobrazení výsledku je třeba se přihlásit.
Publikováno v:
Energies, Vol 14, Iss 14, p 4244 (2021)
A clearance gap (CG) between guide vanes (GVs) and facing plates exists at both ends of a Francis turbine and allows the opening angle to be adjusted for varying operating conditions. Leakage flow is induced through this gap due to the pressure diffe
Externí odkaz:
https://doaj.org/article/6924f102ac6e4d5ebadde6115cf0972e
Publikováno v:
International Journal of Rotating Machinery, Vol 2019 (2019)
The rotor stator interaction in a low specific speed Francis model turbine and a pump-turbine is analyzed utilizing pressure sensors in the vaneless space and in the guide vane cascade. The measurements are analyzed relative to the runner angular pos
Externí odkaz:
https://doaj.org/article/f467aa7ab7f049d49869e8f908d47c60
Publikováno v:
Energies, Vol 14, Iss 9, p 2667 (2021)
This paper is focused on the guide vane cascade as one of the most crucial stationary sub-systems of the hydraulic turbine, which needs to provide efficient inflow hydraulic conditions to the runner. The guide vanes direct the flow from the spiral ca
Externí odkaz:
https://doaj.org/article/60bb4a225cb74388a4f605663e823603
Publikováno v:
Shock and Vibration, Vol 2018 (2018)
An analysis of the pressure in a runner channel of a low-specific speed Francis model runner during resonance is presented, which includes experiments and the development of a pressure model to estimate both the convective and acoustic pressure field
Externí odkaz:
https://doaj.org/article/d0e1945bf0bd40eea9fa969d6fed8e2b