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  • Using ultrasonic velocity profile measurements in an air-vessel type surge-tank model
    Klasinc, Roman, 1948- ; Larcher, Markus
    The downstream (turbine) portion of a pumped storage station was reproduced in a hydraulic scale model. Water was supplied through three simulated Pelton turbines. The problem to be solved by the ... model tests was the fact that for structural reasons the turbines are located below the water level of the lower reservoir. As water must be kept away from the turbine rotor, it is necessary to produce overpressure (compressed air). This, however, involves problems which need to be analysed in the physical model by defining the surge movement, because the rotor must by all means be prevented from being submerged. Part of the compressed air escapes together with the turbine outflow. Therefore, it is necessary to optimize the geometries (turbine casing) to minimize this air flow. An ultrasonic measuring equipment (UVP) was used to monitor these processes. Three parameters were considered: the velocity profiles in the surge tank, the movement of the surge, and the distribution of the bubbles.
    Source: Proceedings : 4.ISUD (Str. 77-80)
    Type of material - conference contribution
    Publish date - 2004
    Language - english
    COBISS.SI-ID - 9269526

source: Proceedings : 4.ISUD (Str. 77-80)

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