Results 71 to 80 of about 38,835 (280)

Numerical study on unidirectional fluid–solid coupling of Francis turbine runner

Advances in Mechanical Engineering, 2015
To analyze the fluid–solid coupling stress characteristics of the Francis turbine runner comprehensively, based on the Reynolds-averaged Navier–Stokes equations and shear stress transport k-ω turbulence model, this article performs numerical simulation ...
Kan Kan, Yuan Zheng, Xin Zhang, Chunxia Yang, Yuquan Zhang   +4 more
doaj   +1 more source

Hydro/Battery Hybrid Systems for frequency regulation [PDF]

, 2019
An innovative Hydro/Battery Hybrid System (HBHS), composed of a hydropower plant (HPP) and a Battery Energy Storage System (BESS) is proposed to provide frequency regulation services in the Nordic Power System (NPS).
Laban, Danilo
core   +1 more source

Reducing Tolerance‐Induced Spread on Transmission Error in Planetary Gear Stages Using Monte Carlo Simulations and Surrogate Models Acquired From a Design of Experiments Approach

Wind Energy, Volume 28, Issue 11, November 2025.
ABSTRACT Significant variations in tonality levels are frequently observed among nominally identical wind turbine drivetrains, both in industrial test setups and during field operations, posing challenges to compliance with noise emission standards. This work delves into the influence of production and assembly variations on static transmission error ...
Bart De Smet, Jordi Marco I. Jordan, Bart Blockmans, Philip Becht, Nico De Bie, Frank Naets   +5 more
wiley   +1 more source

Extending the operational range of Francis turbines: A case study of a 200 MW prototype

Energy Conversion and Management: X
Francis turbines are now widely used to support the integration of renewable and intermittent energy sources such as solar and wind power. Consequently, these turbines often operate away from their best efficiency point (BEP).
Michel J. Cervantes, Joel Sundström, Shahab Shiraghaee, Morten Kjeldsen, Erik Jacques Wiborg   +4 more
doaj   +1 more source

Increasing power output from Francis turbines: Effektøkning i vannkraftverk med Francis turbiner

, 2009
The main objective in this thesis was to investigate a potential increase of power output from the existing turbines at Ruacana Hydropower Station. This was restricted to only consider a runner replacement, and only technical aspects of a rehabilitation project has been evaluated.
openaire   +2 more sources

Advanced design and optimization of wind turbines based on turbine theories [PDF]

, 2019
A review of wind turbine technology showed that many flaws in both the flow models and computations are involved in the traditional fundamentals. While traditional methods for design and computation are all based on the airfoil theory, a new method based
Zhang, Zhengji
core   +1 more source

Assessment of Diagnostic Tools to Detect Acute Gas Bubble Disease in Atlantic Salmon (Salmo salar L.)

Journal of Fish Diseases, Volume 48, Issue 11, November 2025.
ABSTRACT Currently, diagnosis of gas bubble disease (GBD) in fish relies on visual observations of bubbles in various body parts and exophthalmus. These observations lack quantified information about gas bubble load, limiting their diagnostic value.
S. Stensby‐Skjærvik, L. Boissonnot, A. S. Dalum, T. Storsul, O. K. Hess‐Erga, S. Calabrese, K. Segadal, L. Andersen, H. Wahl‐Ovesen, I. Rønnestad   +9 more
wiley   +1 more source

Дослідження потоку рідини в двовимірній і тривимірній постановці в проточній частині високонапірної радіально-осьової гідротурбіни [PDF]

, 2019
The paper presents some results of a computational study of the spatial flow of a viscous fluid in a high-pressure Francis turbine Fr500 (in the optimal mode).
Mironov, Konstantin Anatolievich, Oleksenko, Yuliia Yuriivna   +1 more
core  

The Audiences of Climate Claims: How Interactional Settings Shaped New Yorkers' Comments on the State's Mitigation Plan

Sociological Forum, Volume 40, Issue S1, Page S52-S66, November 2025.
ABSTRACT Controversy over climate change indicates the difficulty of constructing a shared reality. The stakes of doing so are high as democracies struggle to find common ground about the problems they are confronting. Leveraging variation in the settings in which New Yorkers made over 35,000 comments on the state's climate plan in 2022, from an online
Ankit Bhardwaj
wiley   +1 more source

Solid–Liquid Flow Analysis of Francis‐99 Turbine Runner: Effects of Sediment Concentration

Energy Science & Engineering
This study examines the behavior of solid–liquid two‐phase flow within the runner of the Francis‐99 turbine. Numerical simulations were carried out by Ansys Fluent software using the Mixture multiphase flow model along with the Realizable k‐ε turbulence ...
Kang Xu, Pinyu Xiang, Ziyao Zhou, Yufan Xiong, Zhishun Yu, Xiaobing Liu, Jiayang Pang   +6 more
doaj   +1 more source