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Analysis of the turbine housing design in terms of heat leakage
Diakov, Jakub ; Lošák, Petr (referee) ; Vlach, Radek (advisor)
This diploma thesis deals with the judgment of usability of the topology optimisation of the Ansys Workbench program combined with thermo-mechanical fatigue and the non-linear material model of a turbine housing. The first part of the thesis includes research which serves for the purpose of understanding and for theoretical support of the practical part. The research part of the thesis at first gives reasons for the choice of the main aim of the thesis. The main aim of the thesis is the decrease of heat leak from the exhaust fumes due to the reason of the sooner combustion products processing and lower emissions production. The second chapter of the research analyses the construction and function of a turbocharger from the perspective of the geometry of the components and also from the perspective of the production and use of the components. The following chapter deals with the analysis of the energetic and thermal balance of the turbocharger. This chapter mentions the fundamental simplifications of the calculation problem and these simplifications are applied in the practical example. Next, the chapter analyses the thermo-mechanical fatigue, classification of the areas of fatigue and it also analyses the approaches used for the life expectancy predictions. The chapter of the research part deals with the selected areas of calculation and their theoretical basis. The last chapter analyses the fluid mechanics and the selected methods of the topology optimisation which are available in the selected calculation program. After the research part of the thesis, there follows the practical part which discusses a multiphysical example of the turbine housing optimisation from the perspective of heat leak and of the turbine housing being exposed to the thermo-mechanical fatigue. The practical part which is composed of several steps is based on the CFD analysis and this analysis is used for the purpose of gaining thermal conditions in order to calculate the transient thermal analysis. Out of the outcomes of the coupled transient thermal analysis, there is used the spatial temperature field which as a result of the expansivity of the material causes non-homogenous stress on the turbine housing. The practical part has an individual chapter dedicated to the usability of the topological optimisation in different types of tasks. One of the parts of this chapter includes is a suggestion of the methodology for determination of voltage limitation for the selected type of topological optimisation. The penultimate chapter in the practical part is dedicated to the topological optimisation of the turbine housing on the basis of the preceding voltage analysis and determined limitation. The last chapter includes performed validation of the optimised shape of the housing after the geometry is adjusted. The validation is performed from the perspective of steady state temperature of the output combustion products, of speed of heating of the optimised geometry and from the perspective of the comparison of the life expectancy determined in the thermo-mechanical fatigue. At the end of thesis, there are included conclusions discussed and suggested, scope for improvement and possibilities for continuation of further research.
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Modification of printhead for 3D print of concrete
Diakov, Jakub ; Paloušek, David (referee) ; Vespalec, Arnošt (advisor)
This bachelor’s thesis deals with the engineering design of the adjustment of the jet used for continuous 3d printing of the concrete mixtures which are used for the printhead which already exists. The main function of the jet is to shape and deposit the printed mixture in a way that it corresponds to the required geometry of the product. The thesis contains a research focused on the issues of 3D printing such as properties of concrete flow, influence of the shape and size of the end of the jet on printing and individual mechanisms related to the optimal use of these jets. The second part of the thesis contains the analysis of knowledge and the determination of the appropriate parameters for the construction of the jet. These parameters influence the geometry and the quality and effectiveness of production. The practical part of the thesis is focused on the possible structural design of the jet adjustment based on the knowledge from the research part of the thesis. The practical part also deals with the design of the jet in a way the flaws and imperfections occurring in case of the previous constructions of the jets. In case of use of the jet designed in the corresponding way, the production can be substantially accelerated, and the quality of products can be substantially higher.
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Analysis of the turbine housing design in terms of heat leakage
Diakov, Jakub ; Lošák, Petr (referee) ; Vlach, Radek (advisor)
This diploma thesis deals with the judgment of usability of the topology optimisation of the Ansys Workbench program combined with thermo-mechanical fatigue and the non-linear material model of a turbine housing. The first part of the thesis includes research which serves for the purpose of understanding and for theoretical support of the practical part. The research part of the thesis at first gives reasons for the choice of the main aim of the thesis. The main aim of the thesis is the decrease of heat leak from the exhaust fumes due to the reason of the sooner combustion products processing and lower emissions production. The second chapter of the research analyses the construction and function of a turbocharger from the perspective of the geometry of the components and also from the perspective of the production and use of the components. The following chapter deals with the analysis of the energetic and thermal balance of the turbocharger. This chapter mentions the fundamental simplifications of the calculation problem and these simplifications are applied in the practical example. Next, the chapter analyses the thermo-mechanical fatigue, classification of the areas of fatigue and it also analyses the approaches used for the life expectancy predictions. The chapter of the research part deals with the selected areas of calculation and their theoretical basis. The last chapter analyses the fluid mechanics and the selected methods of the topology optimisation which are available in the selected calculation program. After the research part of the thesis, there follows the practical part which discusses a multiphysical example of the turbine housing optimisation from the perspective of heat leak and of the turbine housing being exposed to the thermo-mechanical fatigue. The practical part which is composed of several steps is based on the CFD analysis and this analysis is used for the purpose of gaining thermal conditions in order to calculate the transient thermal analysis. Out of the outcomes of the coupled transient thermal analysis, there is used the spatial temperature field which as a result of the expansivity of the material causes non-homogenous stress on the turbine housing. The practical part has an individual chapter dedicated to the usability of the topological optimisation in different types of tasks. One of the parts of this chapter includes is a suggestion of the methodology for determination of voltage limitation for the selected type of topological optimisation. The penultimate chapter in the practical part is dedicated to the topological optimisation of the turbine housing on the basis of the preceding voltage analysis and determined limitation. The last chapter includes performed validation of the optimised shape of the housing after the geometry is adjusted. The validation is performed from the perspective of steady state temperature of the output combustion products, of speed of heating of the optimised geometry and from the perspective of the comparison of the life expectancy determined in the thermo-mechanical fatigue. At the end of thesis, there are included conclusions discussed and suggested, scope for improvement and possibilities for continuation of further research.
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Modification of printhead for 3D print of concrete
Diakov, Jakub ; Paloušek, David (referee) ; Vespalec, Arnošt (advisor)
This bachelor’s thesis deals with the engineering design of the adjustment of the jet used for continuous 3d printing of the concrete mixtures which are used for the printhead which already exists. The main function of the jet is to shape and deposit the printed mixture in a way that it corresponds to the required geometry of the product. The thesis contains a research focused on the issues of 3D printing such as properties of concrete flow, influence of the shape and size of the end of the jet on printing and individual mechanisms related to the optimal use of these jets. The second part of the thesis contains the analysis of knowledge and the determination of the appropriate parameters for the construction of the jet. These parameters influence the geometry and the quality and effectiveness of production. The practical part of the thesis is focused on the possible structural design of the jet adjustment based on the knowledge from the research part of the thesis. The practical part also deals with the design of the jet in a way the flaws and imperfections occurring in case of the previous constructions of the jets. In case of use of the jet designed in the corresponding way, the production can be substantially accelerated, and the quality of products can be substantially higher.
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