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Influence of plan situating of weir in the prismatic channel on discharging capacity
Lukášek, Petr ; Haluza,, Miloslav (referee) ; Šulc, Jan (advisor)
This diploma thesis is focused on determination of plan situating influence of weir discharging capacity. The part of this work is a summary of the information about weirs, principally about determination of discharging capacity on normal weirs, plan deflected and plan radius weirs. Executed model research, which deals with determination of plan situating influence on discharging capacity plan deflected and plan radius weirs in comparison to normal weir, is evaluated in another part of this work. The research is also dealing with influence of aeration of the space under down surface of free jet and influence of downstream water level on discharging capacity. This work compares the results of executed research with available knowledge of other authors, who have dealt with determination of discharging capacity on weirs with different plan situating.
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Shaft spillway capacity depending on flow stages
Monsport, Jakub ; Jobánek, Stanislav (referee) ; Šulc, Jan (advisor)
The first part of this bachelor's thesis is drafted as a search. Summarizes information about spillways and in more detail focuses on shaft spillways and describes not only their construction but also flow stages in a funnel, shaft, elbow and at the beginning of the tunnel. The second part is practical and consists of the measurement of Q/h characteristics on the model of shaft spillway with some modifications.
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Influence of plan radius on discharging capacity of weir
Lukášek, Petr ; Haluza,, Miloslav (referee) ; Šulc, Jan (advisor)
This bachelor's thesis is focused on plan radius weirs. The part of this work is also summary of the information about weirs, principally about plan radius weirs. Executed model research, dealing with determination of influence of plan radius on discharging capacity of these weirs in comparison to straight weir, is evaluated in another part of this work. The research is also dealing with the effect of design of a spillway channel on capacity of the weir. This work compares the results of executed research with results of other authors, who are dealing with plan radius morning glory spillway.
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Influence of transverse bottom elements on energy dissipation in the stilling basin
Knoflíček, Jakub ; Haluza,, Miloslav (referee) ; Šulc, Jan (advisor)
The thesis is dealing with comparing of the kinetic energy flow dissipation in stilling basins of different cross-section, supplemented by cross bottom elements based on model research. Purpose of work is the desire to reconstruct the existing building security structure of waterworks along with increasing their capacity. Within experimental research were measured depths in different variants. Based on the results of model tests are evaluated and tabulated sorted variants of the combat effectiveness of the kinetic energy flow. The results will be used for the efficient design of additional alterations of stilling basins.
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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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efficiency of the bottom elements on the supercritical flow energy dissipation
Knoflíček, Jakub ; Haluza,, Miloslav (referee) ; Šulc, Jan (advisor)
The thesis is dealing with comparing dissipation of the kinetic energy water flow using various bottom elements based on model research. There is missing information about efficiency of different kinds of bottom elements. This absence does not allow to compare different modification of the bottom of stilling basins. Within experimental research were measured depths in different variants. Based on the results of model tests are evaluated and tabulated sorted variants of the combat efficiency of the kinetic energy water flow. The results will be used for the efficient and economic design of additional alterations of stilling basins.
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Effect of the inlets interoperability to their energy efficiency and the surface vortices formation
Chvátal, Petr ; Sehnal, Jan (referee) ; Šulc, Jan (advisor)
This diploma thesis contains several individual parts. It's especially about summary in the area of one-way inlets: the energy efficiency of the inlets and influence of the neighbouring inlets on them, the phases of creation of surface vortices, the influence on the vortex structures by the mutual operation of the neighbouring inlets and also the methods used to determine the critical and safe depth of dive of inlet against the creation of surface vortices. It also includes the description of process and the evaluation of laboratory tests, which are focused on the assessment of the effect of the mutual operation of inlets on their energy efficiency and the creation of higher intensity surface vortices. Important part of this diploma thesis is also a comparison of the achieved results with the results of the authors who have dealt with this issue.
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Shaft spillway water tunnel capacity increasing
Monsport, Jakub ; Jobánek, Stanislav (referee) ; Šulc, Jan (advisor)
In the first part of this diploma thesis, the problem of supercritical flow is described, as what phenomena occur during it and what dangers it brings. The research part continues with a list of structures in the supercritical regime and their modifications, which should eliminate the danger occurring during supercritical flow. The second part of the diploma thesis is practical and presents the measurement of the course of the water level in the tunnel of the shaft overflow on a physical model with different modifications of the initial section of the tunnel due to the search for the most suitable modification, which would ensure a sufficient reduction of dangerous phenomena occurring during supercritical flow. As part of the practical part, in addition to measurements on the physical model, calculations in numerical modelling were also performed using the Flow-3D program.
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Shaft spillway capacity depending on flow stages
Monsport, Jakub ; Jobánek, Stanislav (referee) ; Šulc, Jan (advisor)
The first part of this bachelor's thesis is drafted as a search. Summarizes information about spillways and in more detail focuses on shaft spillways and describes not only their construction but also flow stages in a funnel, shaft, elbow and at the beginning of the tunnel. The second part is practical and consists of the measurement of Q/h characteristics on the model of shaft spillway with some modifications.
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