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Turbocharger seals
Holík, Petr ; Fiedler, Jan (referee) ; Škorpík, Jiří (advisor)
This master’s thesis deals with theme of turbocharger seals. The aims of a thesis are to compare a turbocharger seals used in PBS Turbo turbochargers and to describe a testing of a seals. Principle of turbocharging and types of turbocharger are described in fist part. Next point of the thesis is describing of a face seals and non-contacting seals. The main part of the thesis describes kinds and reasons of seals testing; also contains comparison between labyrinth seals and piston ring, comparison of seals of PBS Turbo’s turbochargers and assesses the impact of turbocharger angle on the tightness of the seal.
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Compressor system of modern turbofan engines
Rajnošek, Jakub ; Zima, Martin (referee) ; Šplíchal, Miroslav (advisor)
The bachelor thesis deals with innovations in compressor systems of modern turbofan engines and ongoing projects aimed at increasing the efficiency of compressor. The first part describes the basic parameters of the compressor with emphasis on efficiency. The second part deals with losses that lead to a decrease in efficiency. The third part describes examples of projects and innovations that focus on increasing the efficiency of compressor.
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Komprimace matrací a její vliv na vlastnosti s ohledem na délku a stupeň komprimace
Popelářová, Petra
The thesis deals with the effect of a new method of mattress compression on their aesthetic and functional properties, with an emphasis on compression length and degree. The work consists of a theoretical and a practical part. The introduction to the theoretical part describes the theory of compression and other related operations. It is followed by a literature review and findings on contemporary materials and their types. The practical part focuses on determining the methodology, preparing test samples, and conducting research. The entire thesis is concluded with the evaluation of measurements, visual assessment and economic evaluation. The results are used to develop summary recommendations for manufacturers regarding the suitability and length of compression.
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Compressor system of modern turbofan engines
Rajnošek, Jakub ; Zima, Martin (referee) ; Šplíchal, Miroslav (advisor)
The bachelor thesis deals with innovations in compressor systems of modern turbofan engines and ongoing projects aimed at increasing the efficiency of compressor. The first part describes the basic parameters of the compressor with emphasis on efficiency. The second part deals with losses that lead to a decrease in efficiency. The third part describes examples of projects and innovations that focus on increasing the efficiency of compressor.
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Rock strength anisotropy - interpretation of laboratory tests
Vilimová, Anna ; Rott, Josef (advisor) ; Kučera, Petr (referee)
Anizotropní materiál má v různých směrech různé vlastnosti. Anizotropie pevnosti je zvláštní typ chování pevnosti v závislosti na podobě struktury horniny. Vliv na její velikost má zejména úhel mezi směrem zatížení a plochou oslabení, důležité jsou ale i další parametry jako je tvar a velikost vzorku, vlhkost aj. Podle tvaru této závislosti můžeme anizotropii rozdělit na "U type", "shoulder type" a "undulatory type" nebo ji můžeme členit podle způsobu jejího vzniku na přirozenou a vyvolanou. Pro výpočet pevnosti anizotropních materiálů existuje celá řada vztahů, většina z nich empiricky odvozená z velkého množství laboratorních zkoušek. V současné době nejpoužívanějším a nejkomplexnějším je Hoek-Brownovo kritérium porušení. Nejčastějším způsobem interpretace anizotropie pevnosti je grafické zpracování obálek pevnosti a závislosti napětí při porušení na úhlu mezi směrem zatížení a plochami oslabení. Kombinací těchto dvou grafů je možné vytvořit plochu porušení horniny. Skutečnost, že hornina nemá ve všech směrech stejnou pevnost, a způsob, jak anizotropii charakterizovat a spočítat její velikost, je zásadní zejména pro návrhy geotechnických konstrukcí a určení napěťového stavu horninového masívu.
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Turbocharger seals
Holík, Petr ; Fiedler, Jan (referee) ; Škorpík, Jiří (advisor)
This master’s thesis deals with theme of turbocharger seals. The aims of a thesis are to compare a turbocharger seals used in PBS Turbo turbochargers and to describe a testing of a seals. Principle of turbocharging and types of turbocharger are described in fist part. Next point of the thesis is describing of a face seals and non-contacting seals. The main part of the thesis describes kinds and reasons of seals testing; also contains comparison between labyrinth seals and piston ring, comparison of seals of PBS Turbo’s turbochargers and assesses the impact of turbocharger angle on the tightness of the seal.
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