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Hydroelastic Response of Hydrofoil Under Cavitation Conditions
Čupr, Pavel ; Koňas, Petr (referee) ; Veselý, Jindřich (referee) ; Rudolf, Pavel (advisor)
Tato disertační práce se zabývá experimentálním a výpočtovým výzkumem přídavných účinků od proudu kapaliny na obtékaný hydraulický profil. Dynamická odezva profilu byla analyzována pro dva typy buzení: buzení odtržením mezní vrstvy a Kármánových vírů a dále buzení pomocí externího budiče připojeného k lopatce. Experimentální měření dynamické odezvy profilu na oba typy buzení bylo provedeno pro lopatku umístěnou v kavitujícím a nekavitujícím proudění. Získané výsledky byly použity pro verifikaci přídavných účinků stanovených s využitím numerického modelování.
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Modal analysis of the swirl turbine runner
Valo, Lukáš ; Fic, Miloslav (referee) ; Čupr, Pavel (advisor)
The bachelor’s thesis deals with modal analysis of the swirl turbine runner. The main aim was to determine natural frequencies and mode shapes of the turbine runner. Both detailed and simplified models of geometry of the turbine runner were analysed for two types of boundary conditions. The ANSYS program was used to carry out numerical simulations. Experimental measurement was realised to verify and to compare results of calculations.
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Marine energy utilization
Nehybová, Petra ; Čupr, Pavel (referee) ; Rudolf, Pavel (advisor)
The main objective of the bachelor thesis is processing research study dealing with the use of ocean energy. This is a potential and kinetic energy from a renewable source. There are three options introduced in this thesis, how is possible to transform the energy of the ocean to electric energy, which is usable for customers.
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Crank press 250 with direct drive
Čupr, Pavel ; Pavlík, Jan (referee) ; Omes, Jiří (advisor)
This thesis deals with the design of the single point crank press with direct drive. This crank press has an O-shaped stand and an access to the workspace from two sides. The introductory part of this paper describes the principles of mechanical presses drives, drives arrangement presses with direct drive and some conceptual solution stands. The main part of this work is a calculation of basic drive parameters of the press. There are suggested three design variants. The design with the smallest space requirements and good accessibility to the press working space was chosen. The calculation of the main shaft, the input shaft to the planetary gearing and calculation of brake sizes and the planetary gear to the bend and tough was done. Part of this thesis also includes technical drawing of the assembly press, technical drawing of the drive press, technical drawing of the stand a technical drawing of the satelitte gearwheel.
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Computational simulation of leveling of long profiles
Čupr, Pavel ; Šebek, František (referee) ; Petruška, Jindřich (advisor)
The purpose of this study is to compare two possible methods of computational modeling of straightening long profiles. The study presents fundamentals of the straightening process, basic principles of the finite element method and the principle of fast algorithm based on Eulerian description of motion of continuum. The study investigates how the two methods are computationally demanding and precise. Finally, the acquired results are summarised and the effectiveness of both algorithms is assessed.
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Hydraulically driven screens
Čupr, Pavel ; Pokorný, Přemysl (referee) ; Škopán, Miroslav (advisor)
This bachelor’s thesis deals with the design of hydraulically driven screen as an entrance clean mechanism in front of the small hydro-electric power plant. This bachelor’s thesis consists of several sections, the first shows overview and function of several kinds of screens of significant producers. Second shows the design of hydraulically driven screens with strength analysis. In the end the design of the hydraulic circuit of the screen drive is done.
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