Results 141 to 150 of about 824,135 (227)

Assessment of the water and energy nexus in the energy supply subsystem of water stressed countries like Iran. [PDF]

Sci Rep
Vahabzadeh M, Molajou A, Variani HA, Afshar A.   +3 more
europepmc   +1 more source

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$H_{\infty }$ Asynchronous Admissibilization for Nonlinear Singular Delayed Hybrid Hydraulic Turbine Governing Systems With Impulsive Perturbations

IEEE transactions on fuzzy systems, 2023
This article researches $H_{\infty }$ asynchronous admissibilization for nonlinear singular delayed hybrid hydraulic turbine governing systems with impulsive perturbations.
Y. Liu, Guangming Zhuang, Xiangpeng Xie, Jianwei Xia   +3 more
semanticscholar   +1 more source

Finite-time Takagi–Sugeno fuzzy controller design for hydraulic turbine governing systems with mechanical time delays

, 2021
The grid has increasingly higher reliability requirements for hydropower supply and regulation, imposing higher requirements for the stability of hydraulic turbine governing system (HTGS).
Yuqiang Tian, Bin Wang, Peng Chen, Yingshan Yang   +3 more
semanticscholar   +1 more source

Design and optimization of turbine for solar chimney power plant based on lifting design method of axial-flow hydraulic turbine impeller

, 2021
Based on the lifting design method of the axial flow hydraulic turbine and axial-flow pump impeller, an air turbine design method considering the optimal turbine pressure drop ratio for the solar chimney power plant was presented in this paper. Numerical
L. Zuo, Pengzhan Dai, Ziyang Yan, Chuang Li, Yuan Zheng, Y. Ge   +5 more
semanticscholar   +1 more source

Crack failure in hydrodynamically lubricated bearings: A case study hydraulic turbine

, 2021
This study investigates the trunnion crack of a 50 MW hydraulic turbine in the generator guide bearing. The crack area has been examined metallographically and the fixing method for the the trunnion crack has been explained.
Yahya Taşgın, Gökhan Kahraman
semanticscholar   +1 more source

A numerical study on the performance of a superhydrophobic coated very low head (VLH) axial hydraulic turbine using entropy generation method

Renewable Energy, 2020
Fluids slip on superhydrophobic surfaces. The slip velocity is modeled by Navier's slip-length. A user defined function (UDF) in ANSYS Fluent 15.0 was developed to implement the slip boundary condition.
M. H. Sotoude Haghighi, S. M. Mirghavami, M. Ghorani, A. Riasi, S. F. Chini   +4 more
semanticscholar   +1 more source

Investigation of the correlation mechanism between cavitation rope behavior and pressure fluctuations in a hydraulic turbine

, 2020
Vortex ropes occurred in the draft tube when hydraulic turbines operating at off-design conditions, which can generate pressure fluctuations. Cavitation vortex rope is one of the most harmful factors to the safety of hydroturbines which may induce ...
A. Yu, Z. Zou, Daqing Zhou, Yuan Zheng, Xianwu Luo   +4 more
semanticscholar   +1 more source

Fixed-time synergetic controller for stabilization of hydraulic turbine regulating system

, 2020
The hydraulic turbine regulating system (HTRS), which is a core part of hydropower station, is essential and significant for the safe and stabilization operation of the hydropower station.
Sunhua Huang, Linyun Xiong, Jie Wang, Penghan Li, Ziqiang Wang, Meilng Ma   +5 more
semanticscholar   +1 more source

Study on the method of reducing the pressure fluctuation of hydraulic turbine by optimizing the draft tube pressure distribution

, 2020
Francis turbines within hydropower plants are required to operate under off-design conditions to meet the grid demand and ensure stability. In line with this, part-load conditions are generally accompanied with draft tube vortex rope appearance and ...
W. Su, Dr. Maxime Binama, Yang Li, Yue Zhao   +3 more
semanticscholar   +1 more source

Swirling flow in a hydraulic turbine discharge cone at different speeds and discharge conditions

Experimental Thermal and Fluid Science, 2019
An experimental investigation of the cavitating turbulent flow in a simplified hydraulic turbine was carried out to examine flow features in a wide range of speed and discharge conditions.
S. Skripkin, M. Tsoy, P. Kuibin, S. Shtork   +3 more
semanticscholar   +1 more source