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Design of outlet and intake objects of Nové Heřminovy dam
Neuvirt, Petr ; Švancara, Jiří (referee) ; Zachoval, Zbyněk (advisor)
In this thesis was presented Nové Heřminovy dam with basic parameters. Requirements on bottom outlets and intake objects are presented as well. Analysis of used valves on all dams in Czech Republic was done as an underlay for suggestions of bottom outlets in this thesis. The main task was to suggest three variations of bottom outlets. Differences are in number of outlets, dimensions, placing and valves. Then variation of intake objects. Each of variation was verbally described and filled with calculations.
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Optimized design of turbine engine intake
Kubo, Michal ; Matějů, Jiří (referee) ; Popela, Robert (advisor)
This master thesis deals with design of a subsonic intake which is used to supply small jet engine integrate into the fuselage of agile small unmanned aerial vehicle (UAV). Some kinds of these intakes are listed in order to inspire and introduce future designers into this part of jet plane design. This thesis contains a small amount of theory about compressible flow, and necessary knowledge which are important to know before the very first attempt to design an intake. Two models were designed in order to prove that the theory listed in this thesis is useful and can be used as a guide in design process of subsonic intakes. Both designs have the same layout. S-duct design with one intake placed on the belly of fuselage was chosen. After CFD analysis of first model it was found that there are huge area with separated flow and vortex. Separated flow leads to big total pressure loss and pressure distortion. While designing the second model the emphasis was to avoid this vortex and improve flow conditions. This optimization was success and the second design have smaller pressure loss in compare to the first design. The difference is more than 50% at fly speed M=0,8.
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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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Instalation of AR64304 Engine
Kubiš, Vojtěch ; Beran, Martin (referee) ; Svída, David (advisor)
This diploma thesis is concerned about installation of AR64304 engine into Alfa Romeo 75. The main goal of this thesis is a design of exhaust system for AR64304 engine installed in the engine bay of the vehicle. The design of the exhaust system was done with a respect to the noise and emission requirements, as well as with a respect to the performance of the engine. Lotus Engine Simulation software was used for the simulation of the engine with proposed exhaust system. Input data for the simulation were obtained from measurements of the cylinder head on a flow bench and precise measurement of camshaft profile. The essential contribution of this work is a set of construction parameters of the exhaust system. This thesis also contains technical specifications of AR64304 engine and the installation process.
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Increase of Charging Efficiency of 140kW CNG Engine
Hadrava, Martin ; Vančura, Jan (referee) ; Svída, David (advisor)
The master’s thesis is focused on flow analysis work filling in turbocharged CNG engine. The research method is reverse engineering. The intake canal is casted and than scanned by 3D Scanner ATOS. The CAD model is created in program Creo Parametric 2.0. In the created interactive model is simulated flow in the CFD program Star CCM +. The air intake system is modified for increasing the charging efficiency of the engine.
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Intanke and exhaust manifold for racing engine
Chuchma, Ondřej ; Zháňal, Lubor (referee) ; Beran, Martin (advisor)
This Master’s thesis is focused on design and optimalization of intake and exhaust system of the C20XE engine. It is four-cylinder gasoline engine with stroke volume of two litres, which was produced by car company Opel. This engine is determined for Opel Astra F automobile, that is build for racing. For optimalization of dimension parameters there is used a Lotus Engine simulation software, which simulates one-dimension gas flowing in manifold. 3D CAD models are made in Pro ENGINNER software.
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Tractor Engines Intake Systems Overview
Pacovský, Tomáš ; Svída, David (referee) ; Dundálek, Radim (advisor)
The main focus of this work is creation of textual and pictorial documentation of equipments used on nowadays tractor engine intake systems. Firstly author is focused on introduction of individual parts of intake system with their detail function description and pictorial documentation. After that the separate intake systems overview is made via world known tractors such as Case IH, Deutz – Fahr, John Deere, Massey Ferguson and New Holland. Every representative of tractor is introduced with its overview and pictures of the most significant parts concerned with inletting of air into the engine. The entire pictures documentation of intake systems overview is made by camera at the place of tractor’s dealer and when this photo documentation was unsatisfactory, the www pages of dealers was used. This bachelor’s thesis should show the progressive development of intake system’s individual equipments. Eventually this thesis can be used to evolve another research projects.
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Safety submersion depth of small hydro-power plant Vydra 2 inlet
Jobánek, Stanislav ; Žoužela,, Michal (referee) ; Šulc, Jan (advisor)
The thesis deals the measurement results on a physical model of the inlet part of the small hydro-power plant Vydra 2. The influence of the shape and location of the intake into the pressure pipe of small hydro-power plant Vydra 2 with respect to the water surface state was analysed. The work also deals with possibilities of using devices to eliminate the generation of vortex of higher intensities.
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Assessment of influence of milking with milking robot on selected parameters of dairy welfare
FIALA, Otakar
The goal of this graduation thesis was to find out the influence of milking by automatic milking system (AMS) to the physiological needs of dairy cows within 30 minutes after milking. Ethological study covered the needs for feed intake, water intake and need for lying down. In the next part were obtained data on performance of dairy cows and time data of milking (Preparation time for milking, milking time, and time in the milking box). For determination of an impact of various technologies on dairy cows, the results were compared with the data obtained on the farm with conventional milking technology (auto-tandem parlor). The need of feed intake in 30 minutes after milking was found in the barn with AMS at 75.51 % of dairy cows, in the barn containing auto-tandem parlor it was 84.37 % of dairy cows. Highest rate of silage intake after milking had dairy cows milked by conventional way. The need of water intake was found out in the barn with AMS at 41.79 % of dairy cows and in the barn containing auto-tandem parlor it was 33.45 % of dairy cows. Higher rate of water after milking had dairy cows on the farm using the milking robot. In terms of the needs of feed intake and water within 30 minutes after milking were found in both compared technology almost identical values, 28.23 % on the farm with AMS and 27.27 % on the farm with auto-tandem parlor. From this common intake was observed earlier water intake of animals on both farms of more than 80% percent. The percentage of the cows, which needed to lie down after milking, was found in both technologies very low. On the farm with AMS it was 3.7 % and on the farm with auto-tandem parlor 5.8 %. On the farm, where AMS is used, we could evaluate the physiological needs within 30 minutes after milking in the various parts of a day. The need to feed intake was the highest between 6pm and 12 am) and the lowest in the morning. The need of water intake after milking was highest in the morning between 6am and 12 pm and the lowest between midnight 12am and 6 am. The need of lie down after milking was highest between midnight and 6am and the lowest between noon and 6 pm. Milk yield per milking was 12.89 kg on the farm with AMS and 13.35 kg on the farm with auto-tandem parlor. The average daily milk yield was on the farm with AMS 36.47 kg and 26.7 kg on the farm with auto-tandem parlor. Lower milk yield per milking and higher average milk yield per day on the other hand on the farm with AMS is caused by a higher frequency of milking, among other factors. Preparation time for milking was 2:24 min with AMS and 2:02 with conventional type of milking. The time itself was detected in both methods over 5 minutes. With conventional type of milking the times were longer by almost 30 s (5:41min). The time in milking box was 7:07 min in the technology AMS and 8:16 min in the conventional system of milking. Frequency of using of milking robot during the day reached the lowest rate between 4 pm and 6 pm and between 4 am and 8 am. The increase in the number of milking after 6 pm relates with silage intake at this time. During comparison of analyzed technologies was found insignificant difference in the physiological needs within 30 minutes after milking. For verification of these conclusions it is important to increase amount of farms with conventional milking system.
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