Browsing EÚ-odbor fluidního inženýrství Viktora Kaplana by Author "Habán, Vladimír"

Now showing items 1-13 of 13

  • Additional effects of uid on the piston 

    Himr, Daniel; Habán, Vladimír; Kůrečka, Jan; Pochylý, František (EDP Sciences, 2018-06-04)
    Additional eect of uid on the solid body is often ignored phenomenon. Although it is possible to do an analytic derivation of equations describing additional eects for many various conditions, it can be dicult to solve ...

  • Check valve slam analysis in pumping station 

    Himr, Daniel; Habán, Vladimír; Dokoupil, Pavel (EDP Sciences, 2016-03-28)
    Pumping station supplies water for technological process. The check valve in the station was replaced with a new one. The regular test of black out discovered the high pressure pulsations accompanied with noticeable pipeline ...

  • Comprehensive Study Of Unsteady Pressure Pulsations Induced By The Spiral Vortex Structure In A Conical Diffuser 

    Štefan, David; Rudolf, Pavel; Hudec, Martin; Habán, Vladimír (Faculty of Technologies and Systems, 2015-09-09)
    The decelerated swirling flow often breaks down into helical structure which is unstable and causes unsteady velocity and pressure fields. The numerical and experimental investigation of this flow pattern is carried out ...

  • Design of hydraulic recuperation unit 

    Jandourek, Pavel; Habán, Vladimír; Hudec, Martin; Dobšáková, Lenka; Štefan, David (EDP Sciences, 2015-11-17)
    Article deals with design and measurement of hydraulic recuperation unit. Recuperation unit consist of radial turbine and axial pump, which are coupled on the same shaft. Speed of shaft with impellers are 6000 1/min. For ...

  • Dynamics of pressure pulsations in thin annular gap 

    Kůrečka, Jan; Himr, Daniel; Habán, Vladimír (IOP Publishing, 2021-06-15)
    Fluid pulsations can significantly influence behavior of bearings or sealing parts of hydraulic machines and therefore their operation. In this contribution, an analytical approach to solve pressure pulsations dynamics is ...

  • Experimental analysis of static and dynamic properties of the check valves 

    Dokoupil, Pavel; Himr, Daniel; Habán, Vladimír (EDP Sciences, 2019-06-28)
    The check valves play an important role in safety and reliability of many technologies using liquid or gas flow. Check valves are elements of the hydraulic system enabling the one-way flow without a significant pressure ...

  • Experimental investigation of check valve behaviour during the pump trip 

    Himr, Daniel; Habán, Vladimír; Hudec, Martin (IOP Publishing, 2017-04-04)
    The paper is focused on the description of an experimental investigation of a nozzle check valve. Attention is paid to the behaviour during transitions when the flow is decelerating. Flow reversal is often accompanied with ...

  • Experimental investigation of the check valve behaviour when the flow is reversing 

    Himr, Daniel; Habán, Vladimír; Hudec, Martin; Pavlík, Václav (EDP Sciences, 2017-05-12)
    Check valve in a pipeline is supposed to prevent the reverse flow and to allow the flow in the positive direction. The construction of check valves follows these requirements, but the check valve must not cause pressure ...

  • Influence of Second Viscosity on Pressure Pulsation 

    Himr, Daniel; Habán, Vladimír; Fialová, Simona (MDPI, 2019-12-12)
    A mathematical model of pulsating flow is proposed in the paper. The model includes more accurate description of energy dissipation, so it allows, for example, better stability analysis of water power plant control and ...

  • Inner Damping of Water in Conduit of Hydraulic Power Plant 

    Himr, Daniel; Habán, Vladimír; Štefan, David (MDPI, 2021-06-25)
    The operation of any hydraulic power plant is accompanied by pressure pulsations that are caused by vortex rope under the runner, rotor–stator interaction and various transitions during changes in operating conditions or ...

  • An Investigation of Viscous Torque Loss in Ball Bearing Operating in Various Liquids 

    Dobrovolný, Martin; Habán, Vladimír; Tancjurová, Jana; Zbavitel, Jan (MDPI, 2021-05-08)
    The limited functionality of seals that are used in hydraulic machines to prevent the liquid from leaking into the bearings may result in decrease in machine efficiency and reliability and may cause an accident of the whole ...

  • Spatio-temporal description of the cavitating flow behavior around NACA 2412 hydrofoil 

    Rudolf, Pavel; Štefan, David; Sedlář, Milan; Kozák, Jiří; Habán, Vladimír; Huzlík, Rostislav (IOP Publishing, 2015-12-06)
    Spatio-temporal description of the cavitating flow around hydrofoil with 8 degrees incidence using proper orthogonal decomposition (POD) is presented. POD is a suitable tool, which provides information not only about the ...

  • Valve exploiting the principle of a side channel turbine 

    Jandourek, Pavel; Pochylý, František; Habán, Vladimír (IOP Publishing, 2017-04-04)
    The presented article deals with a side channel turbine, which can be used as a suitable substitute for a pressure reducing valve. Pressure reducing valves are a source of high hydraulic losses. The aim is to replace them ...