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Investigations of pumped-storage hydro plants in the Alpine area
Umboro Lasminto, Roman Klasinc, 2011, izvirni znanstveni članek

Ključne besede: pumped storage, investigation, scale model, numerical analysis
Objavljeno: 05.06.2012; Ogledov: 730; Prenosov: 7
URL Celotno besedilo (0,00 KB)

3.
Experimental analysis of the impact of particles on the cavitating flow
Boštjan Gregorc, Andrej Predin, Drago Fabijan, Roman Klasinc, 2012, izvirni znanstveni članek

Opis: The purpose of this paper is to present an analysis of the impact of solid particles on the development of cavitating flow conditions around a hydrofoil. Experimental studies have been conducted in a cavitation tunnel with three different mixtures of particles and water. We used a particle-like properties, such as are found in river water, and with increasing mass concentration. We performed measurements of torque and the relative noise in the hydrofoil. The point in the formation of vapour phase on the hydrofoil and the pronounced frequency effect were determined by measuring the relative noise. Based on the analysis the results show that the particles increase the intensity and extent of cavitation.
Ključne besede: particles, cavitation, noise, measurements
Objavljeno: 10.07.2015; Ogledov: 736; Prenosov: 5
URL Celotno besedilo (0,00 KB)

4.
Emergency gate vibration of the pipe-turbine model
Andrej Predin, Roman Klasinc, 2000, izvirni znanstveni članek

Opis: The vibration behaviour of an emergency gate situated on a horizontal-shaft Kaplan turbine is studied. The analysis and transfer of the dynamic movements of the gate are quite complex. In particular the behaviour is examined of the emergency gate for the case when the power unit is disconnected from the system or there is a breakdown of the guide vane system at the moment when the maximal head and capacity are achieved. Experimental-numerical methods both in the time domain and in the frequency are employed. Natural vibrations characterize a first zone, corresponding to relatively small gate openings. As the gate opening increases, the vibration behaviour of the gate becomes increasingly dependent on the swirl pulsations in the draft tube of the turbine. Finally, the data transfer from the model to the prototype by use of the dinamic similitude law is discussed.
Ključne besede: water turbines, emergency gates, vibrations, vibration measurement
Objavljeno: 15.06.2017; Ogledov: 83; Prenosov: 3
.pdf Celotno besedilo (2,45 MB)

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