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Design of hydrogen jet engine to 1kN thrust
Mikulenka, Karel ; Šnajdárek, Ladislav (referee) ; Škorpík, Jiří (advisor)
This thesis includes a brief history of jet engines using hydrogen as fuel. Calculation of thermodynamics of small engine with thrust up to 1 kN which is in modern day used in practice drones or ballistic missiles will be conducted. Given initial parameters compressor selected is of radial type. Calculation of radial compressor and its verification in EES software. Issue of combustion chambers is presented and calculation of chamber balance is carried out. Computation of turbine and blading layout. Proposal of jet for expansion into atmosphere and engine thrust. Comparison of contemporary projects researching hydrogen propulsion in aerospace with their conventional counterparts and assessing their feasibility compared to other types of renewable fuels.
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Steam boiler with grate firing burning mix coal and wood (mixing ratio 30/70-wood)
Dvořák, Aleš ; Kohout, Přemysl (referee) ; Skála, Zdeněk (advisor)
This diploma work attends to presentation of steam grid boiler for wood and brown coal burning in scale (30/70-wood) in load 60t/h, with parametres of outgoing vapour p=7MPa, t=490°C. The work is splitted to several chapters. At the beginning I’m going to make stechiometric calculation and entalpic calculations of air and compustion gas. After that I’m going to calculate heat balance, losses of boiler and set heat efficiency of boiler. Then I’m going to suggest combustion chamber of boiler and make heat calculation. After suggestion of combustion chamber I’m going to set proportions of pulls and heat-delivery surface. In last chapter I’m giong to check heat balance. Inclosure of my work contains drawing documentation of steam boiler.
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Measurement of spray characteristics using optical measurement methods
Ďurdina, Lukáš ; Otáhal, Jan (referee) ; Jedelský, Jan (advisor)
Diplomová práce se zabývá měřením charakteristik sprejů dvou tlakových vířivých trysek pro spalovací komoru malého turbínového motoru na zkušebním stavu za studena pomocí metod Particle Image Velocimetry (PIV) a fázové Dopplerovské anemometrie (PDA). Cílem měření bylo stanovit a porovnat charakteristiky sprejů obou trysek. Výsledky měření mají objasnit rozdílnost chování trysek za provozu a možný dopad na proces spalování. Úvodní teoretická část pojednává o základních fyzikálních principech atomizace kapalin, konstrukci a oblasti uplatnění tlakových vířivých trysek a o principech laserových diagnostických metod použitých při experimentálním měření. Nasledující část popisuje návrh a montáž zkušební trati a dalších zařízení navržených pro experimentální měření v této práci. Experimentální část se zabývá nastavením parametrů měřícího systému a zpracováním dat. Výsledky měření zahrnují vektorová rychlostní pole, axiální rychlostní profily a distribuce velikosti kapek pro různé provozní podmínky obou trysek.
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Cylinder Head for Single Cylinder Engine
Lesák, Tomáš ; Beran, Martin (referee) ; Svída, David (advisor)
This thesis is dealing with structure design solutions of combustion chambers and intake ports in petrol combustion engines, including their basic properties. Part of the thesis is focused on experimental measurements of a real intake port of Mikron III engine. Also it describes creation of 3D model for CFD flow simulation, optimization proposals for improved engine induction and results evaluation.
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Development in pure jet engine and production survey
Štefanovič, Peter ; Koštial, Rostislav (referee) ; Šplíchal, Miroslav (advisor)
The main object of this bachelor thesis is a comprehensive review of jet engines. The thesis briefly explains the broad issue of gas turbines in terms of their operation and various advantages and disadvantages. Then it presents particular application areas. At the beginning it notes the history and introduction of jet engines to the significant field of aviation. The main part focuses also on the current manufacturing of individual types of engines with technical data. In the last section there are classified provisional steps which could affect or improve some parameters. In the end of the bachelor thesis trends and developments are suggested.
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Design of a gas turbine for heating plant
Lang, Filip ; Kracík, Petr (referee) ; Milčák, Pavel (advisor)
This bachelor thesis deals about design combustion turbine for heating plant. It include deciding of type combustion turbine and its calculation. The thesis consists of four main parts. The first part focuses on the analysis of gas turbine and principle of operation. The second part focuses on the requirements of a particular heating plant. The third part focuses on the selection of a suitable turbine from Siemens and last part contains the thermodynamic calculations of selected gas turbine.
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Steam boiler burning wood 60t/h
Umýsa, Radovan ; Baláš, Marek (referee) ; Skála, Zdeněk (advisor)
This diploma thesis deals constructional and calculation design of the steam boiler 60t/h of clean burning wood. For the parameters of the stoichiometric calculations are carried out and enthalpy calculations of combustion and air. The collected data is then made It a diagram of air and flue gas. The following are the calculations with the heat balance calculations of losses and determination of the boiler thermal efficiency of the boiler. It is made of the combustion chamber design and its thermal calculation. After determining the main dimensions of the combustion chamber moves continue the calculation of boiler heating surfaces. At the end of the calculations are controlling the overall energy balance. Boiler output parameters as temperature, pressure and quantity of the steam.
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Grate Biomass Boiler
Fojtl, Martin ; Křemínský, Pavel (referee) ; Lisý, Martin (advisor)
This master’s thesis deals with design of grate hot water boiler. Requirements for hot water are a temperature of 130 °C, and pressure of 20 bar. In this thesis stoichiometric calculations and heat loss based on chosen fuel are presented. The chosen fuel is wood chips. Next, calculations of the combustion chamber, and heat exchangers are included. In the end pressure losses of water and exhaust gases are calculated. A part of this thesis is also a technical drawing documentation, which can be found in the attachment.
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