Results 31 to 40 of about 6,081 (269)

Transient Flow-Induced Stress Investigation on a Prototype Reversible Pump–Turbine Runner

Energies
Pump–turbine units with high heads are subjected to strong pressure pulsations from the unsteady transient flow in fluid channels, which can produce severe vibrations and high stresses on the pump–turbine structural components.
Dehao Zhang, Qiang Quan, Xingxing Huang, Zhengwei Wang, Biao Wang, Yunfeng Xiao   +5 more
doaj   +1 more source

Flow-Induced Vibration of Non-Rotating Structures of a High-Head Pump-Turbine during Start-Up in Turbine Mode

Energies, 2022
Pumped storage-power plants play an extremely important role in the modern smart grid due to their irreplaceable advantages in load peak-valley regulation, frequency modulation, and phase modulation.
Mengqi Yang, Weiqiang Zhao, Huili Bi, Haixia Yang, Qilian He, Xingxing Huang, Zhengwei Wang   +6 more
doaj   +1 more source

Compressible Simulation of Rotor-Stator Interaction in Pump-Turbines [PDF]

International Journal of Fluid Machinery and Systems, 2010
This work investigates the influence of water compressibility on pressure pulsations induced by rotor-stator interaction (RSI) in hydraulic machinery, using the commercial CFD solver ANSYS-CFX. A pipe flow example with harmonic velocity excitation at the inlet plane is simulated using different grid densities and time step sizes.
J Yan, J Koutnik, U Seidel, B Hübner
openaire   +1 more source

Selective hydrometallurgical recovery of gold by using low-cost biomass waste: Kiwi peel

Adsorption Science & Technology
Utilization of kiwi peel (KP) is proposed for gold recovery from electronic wastes (e-wastes). KP was simply modified by dehydration pretreatment with concentrated sulfuric acid.
Dan Yu, Xiaomei Guo, Yang Liu
doaj   +1 more source

Вдосконалення робочого процесу гідротурбін та систем їх регулювання [PDF]

, 2019
The paper provides the detail analysis of the causes of various types of the vortex motion of the turbulent flow in the inlet parts of the turbine and in the inter-blade channels of the runner.
Gasiyk, Alexander, Krupa, Evgeniy, Migushchenko, Ruslan, Potetenko, Oleg   +3 more
core   +1 more source

Waveguide Photoactuators: Materials, Fabrication, and Applications

Advanced Robotics Research, EarlyView.
Waveguide photoactuators convert guided light into mechanical motion. Their tethered‐flexible design enables minimally invasive surgery and confined‐space robotics. This review aims to guide materials selection, device design, and system integration, accelerating the transition of waveguide photoactuators from laboratory prototypes to versatile ...
Minjie Xi, Hemin Pan, Yang Zong, Yongfeng Mei, Jizhai Cui   +4 more
wiley   +1 more source

Operation strategy of the heliostat field and receiver based on categorization of DNI fluctuation types

Scientific Reports
Transient changes in receiver heat are due to Direct Normal Irradiance (DNI) fluctuations, requiring operational strategies for receiver safety in cloudy weather.
Jing Nie, Weijia Wang, Xiaomei Guo, Jie Huang   +3 more
doaj   +1 more source

Application of the method of average dimensionless parameters for determining the optimal operating mode of a high-pressure reversible hydraulic machine [PDF]

, 2019
Представлено аналіз робіт в області гідродинамічних розрахунків, який відзначає відсутність єдиних підходів в питанні систематизації та узагальнення результатів проведених досліджень. Запропоновано метод визначення оптимальних параметрів роботи оборотної
Косоруков, Олександр Володимирович, Рєзва, Ксенія Сергіївна, Тиньянова, Ірина Іванівна   +2 more
core   +1 more source

Numerical analysis on pump turbine runaway points

IOP Conference Series: Earth and Environmental Science, 2012
To research the character of pump turbine runaway points with different guide vane opening, a hydraulic model was established based on a pumped storage power station. The RNG k-? model and SMPLEC algorithms was used to simulate the internal flow fields. The result of the simulation was compared with the test data and good correspondence was got between
L Guo, J T Liu, L Q Wang, L Jiao, Z F Li
openaire   +1 more source

Modulation of Network Plasticity Opens Novel Therapeutic Possibilities in Cancer, Diabetes, and Neurodegeneration

Advanced Science, EarlyView.
Plasticity changes of molecular networks form a cellular learning process. Signaling network plasticity promotes cancer, metastasis, and drug resistance development. 55 plasticity‐related cancer drug targets are listed (20 having already approved drugs, 9 investigational drugs, and 26 being drug target candidates).
Márk Kerestély, István Narozsny, Levente Szarka, Daniel V. Veres, Peter Csermely, Dávid Keresztes   +5 more
wiley   +1 more source