Recent Submissions

  • FSI Computation and Experimental Verification of Fluid Flow in Flexible Tubes 

    Šedivý, Dominik; Fialová, Simona; Klas, Roman; Kotek, Michal (Sciendo, 2020-07-24)
    Presented paper is focused on the experimental and computational study of fluid flow in pipes with flexible walls. One possible real example of this phenomenon is the blood flow in arteries or their substitutes in the human ...
  • 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 ...
  • 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 ...
  • A new form of equation for force determination based on Navier-Stokes equations 

    Fialová, Simona; Pochylý, František; Šedivý, Dominik (EDP Sciences, 2018-11-12)
    This work is focused on calculating the force effects of an incompressible homogeneous liquid on a surface of a rigid or a flexible tube. An unsteady flow induced by differential pressure at the beginning and at the end ...
  • Turbulence Models for Simulation of the Flow in a Rotor-Stator Cavity 

    Zemanová, Lucie; Rudolf, Pavel (EDP Sciences, 2019-06-28)
    Modelling of the flow in the cavities between a rotor and a stator is a task of great engineering interest. Correctly evaluated pressure and velocity field enables calculation of the disk losses and therefore assessment ...
  • Design of a high-specific speed turbine with non-uniform blade cascade 

    Stareček, Jakub; Čupr, Pavel; Haluza, Miloslav (EDP Sciences, 2019-06-28)
    This paper presents the hydraulic design of Kaplan type turbine in fully axial configuration. The turbine model consists of a straight pipe intake, a rib which covers the shaft, five axial guide vanes, a six blade runner ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...