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Modeling the Impact of Piston Rings on Oil Consumption of Internal Combustion Engines
Raffai, Peter ; Pavlov,, Michal (oponent) ; Dr. Dan E. Richardson (oponent) ; Kučera, Pavel (oponent) ; Novotný, Pavel (vedoucí práce)
Within the frame of the present work a complex simulation tool was developed, built on strong physical and chemical foundations, supplemented with the appropriate mathematical approaches. The resulting software is capable of determining the performance of a piston ring pack by addressing all key mechanisms and their mutual influence during standard operating conditions of a piston ring. The outputs of the simulation were designed in accordance with industrial interest, like the volumetric gas flow through the piston assembly, the friction power losses and the lubricant oil consumption from the sources, which are affected by the piston ring pack. Besides the development of the simulation model, experiments were conducted with the intention of input data obtainment and results validation on an inline three-cylinder engine. Sample results were shown by applying the model to the parameters of the experimental engine. Possible industrial application of the source code is demonstrated with parameter studies. The work carried out within the frame of this doctoral dissertation was intended to fill the gap in the research area of combined simulation tools, able to support the needs of piston ring manufacturers and engine research centers, to calculate the impact of design parameter changes on friction losses and lubricant oil consumption simultaneously.
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Experimentální softwarový syntezátor zaměřený na tvorbu ambientních mikrointervalových ploch
Pavlov, Mykhailo ; Dlouhý, Dan (oponent) ; Indrák, Michal (vedoucí práce)
Táto bakalářská práce se věnuje experimentálnímu softwarovému nástroji, hlavní jednotkou kterého je sekvencer s možností mikrotónálního ladění a volby stupnic. Hlavním cílem této práce je návrh a implementace takového syntezátoru v prostředí Reaktor na základě znalostí a návrhů získaných v rámci semestrální prace. Práce je rozdělena do dvou částí, teoretické a praktické. Úkolem teoretické části je shrnutí teoretických znalostí potřebných k návrhu a následné implementaci nástroje. Tyto poznatky zahrnují krátkou historii, druhy syntézy, typické konstrukční zásady a zásady interakce s prostředím pro vývoj. Praktická část popisuje proces navrhu a implementace jednotlivých částí nástroje, jeho designu a následně se věnuje použití syntezátoru v praxí, jeho unikátním vlastnostem a teoretickému dalšímu vývoji.
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Modeling the Impact of Piston Rings on Oil Consumption of Internal Combustion Engines
Raffai, Peter ; Pavlov,, Michal (oponent) ; Dr. Dan E. Richardson (oponent) ; Kučera, Pavel (oponent) ; Novotný, Pavel (vedoucí práce)
Within the frame of the present work a complex simulation tool was developed, built on strong physical and chemical foundations, supplemented with the appropriate mathematical approaches. The resulting software is capable of determining the performance of a piston ring pack by addressing all key mechanisms and their mutual influence during standard operating conditions of a piston ring. The outputs of the simulation were designed in accordance with industrial interest, like the volumetric gas flow through the piston assembly, the friction power losses and the lubricant oil consumption from the sources, which are affected by the piston ring pack. Besides the development of the simulation model, experiments were conducted with the intention of input data obtainment and results validation on an inline three-cylinder engine. Sample results were shown by applying the model to the parameters of the experimental engine. Possible industrial application of the source code is demonstrated with parameter studies. The work carried out within the frame of this doctoral dissertation was intended to fill the gap in the research area of combined simulation tools, able to support the needs of piston ring manufacturers and engine research centers, to calculate the impact of design parameter changes on friction losses and lubricant oil consumption simultaneously.
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