Results 191 to 200 of about 805,835 (276)
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Effect of blade curve shape on the hydraulic performance and pressure pulsation of a pump as turbine
The Physics of Fluids, 2022As an economical and convenient device, a pump as turbine (PAT) is widely preferred in the energy recovery process and micro-hydropower plants. To study the operational stability of a PAT, a forward-curved impeller and a back-curved impeller were ...
Ru Xiang +5 more
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Hydraulic Turbine Contra-Angle Handpiece
The Journal of the American Dental Association, 1953A high rotary speed enhances the effi ciency of instruments used for cutting teeth in operative procedures. The small diameters of the dental cutting tools make it necessary to turn the instru ments at high rates of speed in order to obtain effective linear speeds for the re moval of enamel.
R J, NELSEN, C E, PELANDER, J W, KUMPULA
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2019 IEEE 3rd Conference on Energy Internet and Energy System Integration (EI2), 2019
This paper analyzes the damping effect of hydraulic turbine governor on ultra-low frequency oscillation (ULFO) based on damping torque analysis, comparing the damping of different operating modes of the governor.
Liang Cheng +5 more
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This paper analyzes the damping effect of hydraulic turbine governor on ultra-low frequency oscillation (ULFO) based on damping torque analysis, comparing the damping of different operating modes of the governor.
Liang Cheng +5 more
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Practical hydraulic turbine model
2006 IEEE Power Engineering Society General Meeting, 2006This paper reports on some practical hydraulic turbine models for Francis turbines and pumped-storage hydraulic turbines. The power system frequency during transient conditions greatly depends on governor control characteristics. Hydraulic governors take on an important role to stabilize a power system frequency.
A. Izena +7 more
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Restarting Method for Hydraulic Turbine Generation Systems Applied PMSG Sensorless Control
International Conference on Performance Engineering, 2019This paper presents a restarting method for hydraulic turbine generation systems applied permanent magnet synchronous generator (PMSG) sensorless control.
Yeongsu Bak, Kyo-Beum Lee
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Canadian Journal of Civil Engineering, 2001
A set of empirical equations has been developed which defines the peak efficiency and shape of the efficiency curve for hydraulic turbines as a function of the commissioning date for the unit, rated head, rated flow, runner speed, and runner throat or impulse turbine jet diameter.
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A set of empirical equations has been developed which defines the peak efficiency and shape of the efficiency curve for hydraulic turbines as a function of the commissioning date for the unit, rated head, rated flow, runner speed, and runner throat or impulse turbine jet diameter.
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, 2019
A nonlinear predictive control scheme with a state estimator for a fractional-order hydraulic turbine governing system is studied in this article. First, a more practical fractional-order model of the hydraulic turbine governing system is introduced ...
Yuqiang Tian +3 more
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A nonlinear predictive control scheme with a state estimator for a fractional-order hydraulic turbine governing system is studied in this article. First, a more practical fractional-order model of the hydraulic turbine governing system is introduced ...
Yuqiang Tian +3 more
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Hydraulic Elastic Vibration Analysis of Hydraulic Turbine Blade
Advanced Materials Research, 2011This paper analyses quantitatively mechanism that hydraulic turbine runner blade tail produces Carmen vortex column, and the blade hydraulic elastic vibration which is produced by Carmen vortex column, also analyses the harms of blade hydraulic resonance, puts forward corresponding preventative measures.
Ling Hua Wang, Pan Hua Ning, Chao Gan
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Hydraulic characteristics of turbine impeller
Collection of Czechoslovak Chemical Communications, 1982The study concentrates on the determination of hydraulic characteristics (volumetric flow rate, power output, hydraulic efficiency and total head) of a standard, six-blade turbine impeller in a flat-bottomed cylindrical vessel provided with radial baffles at a turbulent regime of agitated liquid. The investigated characteristics are determined by means
Ivan Fořt, Jana Malá
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