Results 41 to 50 of about 2,207,326 (232)
IOP Conference Series: Earth and Environmental Science, 2014 Pump-turbines were always running at partial condition with the power grid changing. Flow separations and stall phenomena were obvious in the pump-turbine. Most of the RANS turbulence models solved the shear stress by linear difference scheme and they were isotropous, so they couldn't capture all kinds of vortexes in the pump-turbine well.
J Liu, S Liu, Z Zuo, Y Wu
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Advanced Science, EarlyView.High‐throughput antibiotic cross‐gradient assays on microdroplet arrays. A multichannel printhead together with five pressure regulators forms droplet arrays of up to 20 832 droplets within 25 minutes. Each droplet contains unique concentrations of antibiotics, allowing to moniture a vast spectrum of bacterial repsonses over night. The bacterial growth
M. Breitfeld +5 more
wiley +1 more source
Energies, 2018 Hydraulic instability is a complex factor causing the vibration of hydro-turbine generator shafting system (HGSS), and the mechanism is the uneven distribution of flow along the circumference.
Keyun Zhuang +4 more
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Energy Science & Engineering, 2022 This paper aimed to investigate the multi‐objective optimization and decision‐making of the combined control law of guide vane (CCLGV) and pressure regulating valve (PRV) for hydroelectric unit under load rejection.
Tianyu Zhang +3 more
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Analysis of the pump-turbine cavitation with small guide vane opening on pump mode
IOP Conference Series: Earth and Environmental ScienceAbstract Cavitation is the main factor affecting the secure and stable operation of pump-turbine units. In this paper, a prototype of pump-turbine with splitter blade was chosen for analysis. The three-dimensional numerical calculation of the entire flow passage is carried out for the pump model under different cavitation number with ...
Q H Tian +7 more
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A Modular Variable Stiffness Co‐Bot System Achieving Tasks Flexibility and Contact Compliance
Advanced Science, EarlyView.Bio‐inspired antagonistic compliance enables a modular rigid‐soft co‐bot platform with variable stiffness for safe human‐robot interaction (HRI): Standardized interfaces support application‐driven configurations with tailored DoFs, workspace, and stiffness range, making the system suited to HRI and low‐volume automation.
Wenlong Gaozhang +6 more
wiley +1 more source
Guide Vane for Thermal Enhancement of a LED Heat Sink
, 2022 A guide vane was installed on a heat sink to enhance the cooling effect of light-emitting diode (LED) lights. The validity of the numerical analysis was verified against the experimental results and the result of the previous studies.
Seounghwan Hyeon +2 more
core +1 more source
Investigation of the Centrifugal Force Effect to a Revolving Vane (RV) Machine [PDF]
, 2012 The Revolving Vane (RV) machine is unique because the cylinder rotates together with the rotor at their respective axis. This causes various unique behaviors that are not previously observed in the conventional rotary machines. In this paper, the effects
Subiantoro, Alison, Ooi, Kim Tiow
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Machines, 2022 The flow characteristics of the draft tube of a Francis turbine have a significant influence on turbine stability. Numerical simulations were performed for a Francis turbine under three different output conditions of 20%, 100%, and 120% at the rated and ...
Lei Ji +7 more
doaj +1 more source
Verification of Kaplan turbine cam curves realization accuracy at power plant [PDF]
Zbornik Radova: Elektrotehnički Institut "Nikola Tesla", 2016 Sustainability of approximately constant value of Kaplan turbine efficiency, for relatively large net head changes, is a result of turbine runner variable geometry.
Džepčeski Dane +6 more
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