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Measurements of small flow rates
Lorenc, Dominik ; Šedivá, Soňa (referee) ; Mancl, Vlastimil (advisor)
The thesis deals with the extension of the laboratory fixtures with a~measuring track designed for the measurement of small fluid flows, on which the thermal flowmeter is tested. The used calibration methods are examined and the track is then subsequently constructed. A~measurement operating program is also developed to set the measurement parameters and to store the measurement data in the required format. The parameters and characteristics of the reference scale used and the thermal flowmeter provided are then measured on the constructed track. The measurement results are presented and the uncertainties of the selected flow rates are determined.
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Vehicle Hydropneumatic Unit
Koudelka, Roman ; Hejtmánek, Petr (referee) ; Blaťák, Ondřej (advisor)
This diploma thesis, following the bachelor's thesis, is devoted to the gas-liquid unit of a vehicle, as the central element of hydropneumatic suspension. The aim is to dimension and construct this component and integrate it together with other elements into a complex suspension system. Based on possible forms listed in the research section, regarding to current development trends, the form of the unit is chosen. The practical part begins with simulations comparing a hydropneumatic with a conventional suspension system. After solving this issue, it is possible to proceed to the dimensioning of the basic parameters of the unit and then to its construction, respecting the relevant strength calculations. The last step is to build a conceptual design of the whole hydropneumatic suspension system.
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Navier-Stokesova equation - solution of the real liquid
Krausová, Hana ; Čermák, Libor (referee) ; Fialová, Simona (advisor)
This thesis deals with the Navier-Stokes equations for real, compressible fluid with first and second viscosity. The method of expansion into a series of eigenmodes of vibration is chosen to solve the Navier-Stokes equations. The general relations of the expansion coefficients and the eigenmode shapes are given for 1D-, 2D- and 3D-flows. The specific formulae of eigenmodes of vibration are determined only for 1D-flow. The final form of the pressure function is analysed using Matlab software.
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Diagnostics of the perspective insulating liquids
Spohner, Milan ; Rozsívalová, Zdenka (referee) ; Frk, Martin (advisor)
This work deals with the classification and diagnosis of electrical insulating liquids. Furthermore, the theoretical part describes the mathematical and physical principles of these liquids. The automated workplace was compiled with development environment VEE Pro for measurement of viskosity and control thermostat medingen and modifiable components for measuring complex permittivity in the frequency range. In the experimental part was carried out measurements of selected material parameters, investigated the effect of difficult conditions and made the mathematical evaluation of physical phenomena.
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Pulse flow of liquid in flexible tube
Komoráš, Miroslav ; Šedivý, Dominik (referee) ; Klas, Roman (advisor)
This master’s thesis is dealing with analysis of fluid flow pulse in a flexible tube representing e.g. an artery in a human body. In ANSYS program, 3D simulations were performed, and these are so-called interrelated FSI analysis. In Maple software, 1D simulations of fluid flow in the tube were performed for various thin-walled and thick-walled variants. The aim is using these programs to determine the flow rates and pressures in the tube, its wall deformation and stress. Therefore, the theoretical part deals mainly with basic equations of flow dynamics, linear and nonlinear models and rotationally symmetric vessels. In the computational part are described individual procedures in the mentioned programs.
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Sheet metal forming using liquid
Fries, Petr ; Císařová, Michaela (referee) ; Řiháček, Jan (advisor)
This work is focused on unconventional technology using liquid as forming medium. The thesis presents the principle of forming methods hydroforming and its variations, wheelon, Flexform, hydromechanical drawing and explosive forming with examples of parts produced individual methods. A comparison of their advantages and disadvantages with conventional production methods.
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The Tool for a Radial Expanding of Tubes by Liquid
Horák, Michal ; Lidmila, Zdeněk (referee) ; Peterková, Eva (advisor)
The submitted diploma thesis is focused on problematic of a radial expanding of tubes. In the first part of thesis, there is a summary of possible theoretical formulas for determining the stress-strain material parameters for biaxial bulging test of tube by liquid. Also there are showed several options for testing tools used in research abroad. The work also contains technological and control calculations for the selected test sample from the tube of steel 17 240 (1.4301). At the end of thesis, there are key points for tool design and there is also presented the proposed the test tool for a radial expanding of test sample of tube to the free space and with firmly fixed the ends of tube in the tool.
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Sensor for low-speed continuous motion sensing
Tomášek, Petr ; Slavík,, Lubomír (referee) ; Fiala, Pavel (advisor)
Diploma thesis analyses low-speed flow measurement. Thesis consist of 4 chapters. First chapter is about liquids and its attributes, flow meters, especially induction flow meter, which is very important for designed sensor. In second chapter is detailed process of designing sensor. Description of realization and measurement of flow is in the third chapter. Result summary is in conclusion.
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Relevance of the hydrostatic and hydrodynamic paradox
Vacula, Jiří ; Haluza, Miloslav (referee) ; Fialová, Simona (advisor)
This bachelor’s thesis is concerned with the explanation of the hydrostatic and hydrodynamic paradox existence. Above all hydrostatic paradox is not in general properly explained which causes additional puzzle. Therefore the aim of this thesis is to find real reasons of these effects and in addition to check up possible consequences of liquid compressibility.
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The use of fluid medium in forming technologies
Březina, Vít ; Peterková, Eva (referee) ; Podaný, Kamil (advisor)
This publication includes a research of currently used technologies with liquid as a forming or supporting medium. There is a description of methods of Hydroform, ASEA, Wheelon, Flexform, hydro-mechanical forming, Pillow hydroforming and groups of high-pressure, low pressure and pressure sequence hydroforming. The publication also includes analysis of the media used for lubrication of contact surfaces during the process of forming and operating fluids. The publication shows examples of companies which are using this technologies and samples of their products.
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