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Design of combustion chamber 30 kW for gaseous fuels
Rychter, Aleš ; Hudák, Igor (referee) ; Skryja, Pavel (advisor)
Master thesis deals with design of combusting chamber for gaseous fuels with predicted thermal output less than 30 kilowatts. Designed equipment will be used as a generator of flue gases with required parameters further used for experimental catalytic unit. Due to the need of draft creation inside the combustion chamber and exhaust pipe is master thesis also deals with design of ejector nozzle, which will be used for this purpose. Opening chapters of this work, considering a theoretical part, are focused on basic classification of combustion chambers and industrial burners. Next and main chapter is dedicated to main goal of this work, which is combustion chamber design, containing necessary calculations divided into balance calculation and construction design. Final chapters deals with above mentioned calculation of ejector nozzle ensuring sufficient draft and also sufficient cooling of flue gases incoming from catalytic unit.
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Hydrodynamic mixing of water-ask mixture in vessel
Holub, Přemysl ; Franc, Zdeněk (referee) ; Habán, Vladimír (advisor)
Master´s thesis Hydrodynamic mixing of water-ash mixture in vessel is interested in describing fluid and solid particles flow in a vessel. The mixing was conducted in cylindrical vessel by a radial nozzle. The goal of the thesis is to describe flow field and places where the most of the particles are descending according to position, depth, flow rate and nozzle orientation in the vessel. An experiment was conducted in order to investigate and document 8 different positions and orientation of the nozzle. Significant changes in flow fields and mixing time were observed. A mathematical model of the vessel with the nozzle was created in Fluent program. Places with the lowest velocities according to the model were in good agreement with places where the most of the solid particles were descending.
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Testing of liquid fuels atomizers
Suchánek, Petr ; Skryja, Pavel (referee) ; Kermes, Vít (advisor)
This thesis is dealing with testing of two atomizers in combustion of liquid fuels and natural gas. There is a simple analysis of problems, principles and methods of atomizing liquids executed. Problem of pneumatic atomizing liquids is also described in detail. In the next chapters there is a plan and running of testing processed. Overall behavior of the atomizers and flame is evaluated from the outcome measurement and the power characteristics of atomizers and influence of GLR on the quality of combustion are determined. Overall rating of the testing is presented in conclusion this thesis.
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Design and lay-out of high pressure pumping station.
Václavík, Tomáš ; Franc, Zdeněk (referee) ; Habán, Vladimír (advisor)
The aim of diploma thesis is design and lay-out of high pressure pumping station with plunger pumps for splash of scales from slabs of hot-rolled. Theoretic (introduction) part of this thesis contain description of formation of scales and description of ways how it is possible remove these scales. And this part contains also explication of effect of water jet on solid material. The practical part of diploma thesis is focused on design of pumping station including of dimensioning of machinery. Part of this work is also technical documentation for proposed pumping station and specification of main machines and devices.
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Experimental verification of ejector and creation of mathematical model.
Strmiska, Michal ; Štigler, Jaroslav (referee) ; Habán, Vladimír (advisor)
This diploma thesis deals with the area of ejectors. In the intoduction, an ejector is classed as an hydraulic machine. There is also an introduction of the principle and application of this machine there. The next part describes two different ways of calculation and there is a suggestion how to get characteristics, that were achieved by calculation in MS Excel, projected. The purpose of this diploma thesis is to confront this mathematical model with the experiment done in school laboratory at Kaplan department of hydraulic machines. The description of this experiment and the evaluation procedure of measured values is described in the final part of this diploma thesis.
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Engine Motormanagement Software
Kopecký, Ivo ; Vítek, Ondřej (referee) ; Hájek, Vítězslav (advisor)
Fuel injection is a means of metering fuel into an internal combustion engine. In modern automotive applications, fuel metering is one of several functions performed by an "engine management system". A fuel injection system is designed and calibrated specifically for the type(s) of fuel it will handle: gasoline (petrol), Autogas LPG (also known as propane), ethanol, methanol, methane (natural gas), hydrogen or diesel. The majority of fuel injection systems are for gasoline or diesel applications. With the advent of electronic fuel injection, the diesel and gasoline hardware has become quite similar. During the last twenty years a preparation of a fuel mixture and the way of ignition in engine segment have changed the most. Instead of a carburettor it is being used the unit, which prepare fuel mixture according to a status of a car on the road e.g. change of pressure, temperature or ratio of a fuel and air.
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Modification of 3D milling machine to 3D printer
Halamíček, Lukáš ; Vetiška, Jan (referee) ; Bradáč, František (advisor)
This thesis deals with rebuilding of engraving machine to 3D printer. In the first part it describes possible 3D printing technologies and its utilizations in rebuilding. In the next section suitable parts for reconstruction are chosen and described. Then the controlling of heating bed, hot end and filament feed is realized by using software TwinCAT by company Beckhoff. Functional 3D printer should be result of this thesis.
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Manufacturing of Components Using the Waterjet Method
Petřek, Lukáš ; Osička, Karel (referee) ; Kalivoda, Milan (advisor)
The present bachelor thesis deals with the technology of high pressure hydroabrasive jet. The work is divided into several parts, where the first part analyzes the working principle of technology and compares the measured arithmetic mean deviation of the profile Ra on the cutting edges of the sample after incision by high pressure hydroabrasive jet with the arithmetic mean deviation of the profile Ra given by technology manufacturer, Furthermore it presents a division of abrasives including their recycling and an impact of wastewater on the environment. The second part focuses on the description of individual components of the above technology. The following third part is devoted to the company Rychlý TOM engaged in the production and cutting of material using this technology. In addition, the fourth part discusses the production of individual components. New trends in the area of technology of high pressure hydroabrasive jet are presented in the last part. Finally the thesis provides a discussion and conclusion.
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Quality of fuel atomization from small pressure-swirl atomizers
Malý, Milan ; Broukal, Jakub (referee) ; Jedelský, Jan (advisor)
Tato bakalářská práce se zabývá měřením charakteristik spreje z tlakové vířívé trysky za použití fázového doplerovského analyzátoru. Cílem měření bylo stanovit a porovnat charakteristiky spreje za použití různých kapalin a různých režimů tlaků a rozhodnout, jestli je možné nahradit kerosin biopalivy z pohledu kvality atomizace. Teoretická část se zabývá základy rozpadu kapalin z tlakových vířivých trysek a principy laserové anemometrie. Experimentální část popisuje testovací trať, provozní podmínky a nastavení experimentu. Výsledy obsahují vizualizaci spreje, velikostní rozložení kapek uvnitř spreje, profily rychlosti a Sautrova středního průměru za použití různých provozních podmínek jako je různá vzdálenost od trysky, rozdílný vstupní tlak a různé kapaliny.
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Construction and production of wiping element of open source FDM printer
Chrást, Jan ; Slaný, Martin (referee) ; Zemčík, Oskar (advisor)
The aim of thisworkis to design and manufacture a cleaning element foropen source FDM printer. The workincludestheoreticalanalysis of theissue of cleaningnozzle of FDM printer and the design solution in the form of cleaner element. Model of body of cleaning element isdesigned in program Autodesk Inventor and made on the open source printerowned by Ing. Zemčík. Subsequently, the solutionistested and cleaningproperties are comparated.
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