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Hydroekologický monitoring a revitalizace malého vodního toku
Řídký, Vojtěch ; Králová, Helena (oponent) ; Hyánková, Eva (vedoucí práce)
Tato práce popisuje hydroekologický monitoring drobného vodního toku Stanůvka v Jihomoravském kraji. Hydroekologický monitoring byl proveden podle uznávané metodiky ministerstva životního prostředí České republiky. V práci je dále navržena revitalizace tohoto vodního toku. V závěru práce je pak provedeno porovnání aktuálního stavu toku a stavu navrženého revitalizací a je vyhodnocen přínos této revitalizace.
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Hydroekologický monitoring a revitalizace malého vodního toku
Řídký, Vojtěch ; Králová, Helena (oponent) ; Hyánková, Eva (vedoucí práce)
Tato práce popisuje hydroekologický monitoring drobného vodního toku Stanůvka v Jihomoravském kraji. Hydroekologický monitoring byl proveden podle uznávané metodiky ministerstva životního prostředí České republiky. V práci je dále navržena revitalizace tohoto vodního toku. V závěru práce je pak provedeno porovnání aktuálního stavu toku a stavu navrženého revitalizací a je vyhodnocen přínos této revitalizace.
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Parallel numerical simulation of airflow past an oscillating NACA0015 airfoil
Řidký, Václav ; Šidlof, Petr ; Vlček, Václav
This paper focuses on 3D and 2D parallel computation of pressure and velocity fields around an elastically supported airfoil self-oscillating due to interaction with the airflow The results of numerical simulations are compared with data measured in a wind tunnel, where physical model of a NACA0015 airfoil was mounted and tuned to exhibit the flutter instability. The experimental results were obtained previously in the Institute of Thermomechanics by interferometric measurements in a subsonic wind tunnel in Nový Knín. For the numerical solution is implemented in OpenFOAM, an open-source software package based on finite volume method. In the numerical solution is prescribed displacement of the airfoil, which corresponds to the experiment.
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Numerical simulations of the flow with the prescribed displacement of the airfoil and comparison with experiment
Řidký, Václav ; Šidlof, Petr ; Vlček, Václav
The work is devoted to comparing measured data with the results of numerical simulations. As mathematical model was used mathematical model whitout turbulence for incompressible flow In the experiment was observed the behavior of designed NACA0015 airfoil in airflow. For the numerical solution was used OpenFOAM computational package, this is open-source software based on finite volume method. In the numerical solution is prescribed displacement of the airfoil, which corresponds to the experiment. The velocity at a point close to the airfoil surface is compared with the experimental data obtained from interferographic measurements of the velocity field. Numerical solution is computed on a 3D mesh composed of about 1 million ortogonal hexahedron elements. The time step is limited by the Courant number. Parallel computations are run on supercomputers of the CIV at Technical University in Prague and on a computer cluster of the Faculty of Mechatronics of Liberec . Run time is fixed at five periods, the results from the fifth periods and average value for all periods are then be compared with experiment.
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Tribological Behaviour of Plasma Sprayed Al2O3 and Cr2O3 Coatings
Řidký, V. ; Dubský, Jiří ; Cejp, J.
Plasma sprayed ceramics coatings are well known for their wear resistance.Plasma sprayed alumina and chromia oxide coatings are widely used to improve the resistance of metallic components against various types of wear and corrosion[1,2].However, the particular structure of plasma-sprayed coatings(high porosity,cracks,nehomogenity etc.) affects their mechanical properties.
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