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Shaping discharge chamber of hollow cone valve
Nehudek, Adam ; Haluza,, Miloslav (referee) ; Šulc, Jan (advisor)
The thesis is dealing with the design and position of the discharge chamber of hollow cone valve and is based on model research. The research response especially to the existing bottom outlets, where the position of valve is changed as opposed to the current position. The change of the valve position causes construction interventions minimization and also required financial resources are minimized. The other case is to interchange the old cone valve and the new one. This action is supporting the idea of valve spare parts unfication. In the research has been defined the automodeling area of outlet jet diversion from valve axis for different remoteness between water surface level and valve. The outflow jet diversion angle from valve axis has been measured in relation with relative valve opening. The coefficient of outflow has been specified in relation with relative valve opening. Furthermore, it has been searched for the position of discharge plane, where the discharging is done without backsplash. The last part of model tests was the discharge effect evaluation of most used chamber shapes. In the final chapter has been recomended the optimal shape and position of discharge chamber in dimensionless units, relative to the inlet diameter of the valve, all this based on results of model research. These results will enable reliable and efficient design of additional adjustments of discharge chamber shapes.
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Safety submersion depth of small hydro-power plant Vydra 2 inlet
Jobánek, Stanislav ; Žoužela,, Michal (referee) ; Šulc, Jan (advisor)
The thesis deals the measurement results on a physical model of the inlet part of the small hydro-power plant Vydra 2. The influence of the shape and location of the intake into the pressure pipe of small hydro-power plant Vydra 2 with respect to the water surface state was analysed. The work also deals with possibilities of using devices to eliminate the generation of vortex of higher intensities.
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