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Thermodynamic 1-D model of the turbocharger of an internal combustion engine
Mrázková, Kristýna ; Böhm, Michael (referee) ; Štětina, Josef (advisor)
Master thesis deals with 1D heat transfer simulation of turbine housing laying emphasis on temperature of exhaust gas leaving the turbine. The thesis covers construction and thermodynamics of turbochargers, exhaust gas aftertreatment and heat transfer simulation software. Then the thesis focuses on exploring turbine housing 3D model discretization, building physical turbocharger model for 1D simulation of exhaust gas output temperature and heat transfer through turbine housing. Heat transfer coefficients were calibrated for transient simulation predicting temperature of output exhaust gas in compliance with NEDC cycle. Results analysis and optimization follow, a suggestion on model integration into the virtual turbocharger system is also included.
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Turbine Housing of Turbocharger VNT with Separated Pulses in Exhaust Manifold
Polášek, Jan ; Drápal, Lubomír (referee) ; Novotný, Pavel (advisor)
This master thesis deals with the design of the turbine housing of turbocharger VNT for supplying separated pressure pulses from the exhaust manifold. Subsequently, the work includes strength analysis of the designed turbine housing. The aim of the thesis is to create components for the supply of separate pressure pulses as close as possible to the turbine. Furthermore, the modification of the existing turbine housing and the assessment of the functionality of the VNT mechanism after this modification and strength analysis. The final aim of this thesis is the creation of 2D and 3D technical documentation of newly designed and modified parts.
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Diesel Engine Turbochargers
Fňukal, Jan ; Prokop, Aleš (referee) ; Janoušek, Michal (advisor)
This bachelor's thesis is specialized search dealing with diesel engine turbochargers. The work is divided into four main parts. The first part deals with positives of supercharging, history of turbochargers and principle of supercharging. The second part describes particular construction solution. The third part is focused on systems of regulation. The last part attends to development trends of turbochargers.
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Comparison of strains determined by finite element method and by optical measurement system
Zajíček, Vít ; Hlavoň, Pavel (referee) ; Vlk, Miloš (advisor)
This thesis focuses on the comparison of numerical simulation and optical measurement of deformation of the turbinehousing made by Honeywell company. The numerical calculation performed by finite element method to simulate transient thermal load on the measured entity. Numerical result of the strain state of the body caused by temperature gradients. To verify the simulation is used an experimental digital correlation method VIC-3D. The thesis also mentioned the theoretical foundations of digital correlation methods and thermal analysis.
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Development of combustion engine turbochargers
Franc, Vladimír ; Dlugoš, Jozef (referee) ; Řehák, Kamil (advisor)
This bachelor's thesis is a research project focused on the development of turbocharger technology for diesel and gasoline engines. The work is divided into four chapters. The first chapter is a general description of the construction, basic principles and key components of turbochargers. Next, the history of turbocharging will be briefly summarized. The third chapter is devoted to particular construction methods and finally new development trends will be discussed too.
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Thermodynamic 1-D model of the turbocharger of an internal combustion engine
Mrázková, Kristýna ; Böhm, Michael (referee) ; Štětina, Josef (advisor)
The thesis deals with 1D heat transfer simulation of turbine housing laying emphasis on temperature of exhaust gas leaving the turbine. The thesis covers construction and thermodynamics of turbochargers, SCR catalysts and 1D simulation software. Then the thesis focuses on exploring turbine housing 3D model discretization, building physical turbocharger model for 1D simulation of heat transfer through turbine housing with time dependent input values and predicting temperature of exhaust gas flowing through turbine outlet in compliance with NEDC cycle. Result analysis and a suggestion of subsequent actions follow.
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Design of Turbocharger Heat Protection Sheet
Žaloudek, Vilém ; Kudláček, Petr (referee) ; Novotný, Pavel (advisor)
The safety of machinery is always one of the main priorities when drafting a design solution. In applications of supercharged internal combustion engines in shipping transport, crew safety, it is one of the most important things. This work presents a procedure for eliminating the risks of fire caused by the high temperature of the turbocharger. The surface temperature is reduced by means of a safety cover. The suitable concept was designed and validated by computational model created by the author. The main outcome of this work is the design of several concepts that demonstrate the reduction in surface temperature transfer, analysis, FEM.
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Repair of the turbine housing
Jelínek, Tomáš ; Novotný, Zdeněk (referee) ; Fiedler, Jan (advisor)
This diploma thesis deals with the repair of a steam backpressure single-stage turbine. This thesis is assigned to a specific Spilling turbine case. A revisional report of this turbine with repair or exchange suggestions of demaged turbine parts is processed. In addition, a simulation of the contact pressure is carried out on the split plane of the housing. Structural modifications are designed and simulated to increase the parting plane's tightness. Further, the calculation of the tightening torque of the split plane is performed and a control thermodynamic and strength calculation of the labyrinth seals is performed.
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Turbine Housing of Turbocharger VNT with Separated Pulses in Exhaust Manifold
Polášek, Jan ; Doman, Jozef (referee) ; Novotný, Pavel (advisor)
This master thesis deals with the design of the turbine housing of turbocharger VNT for supplying separated pressure pulses from the exhaust manifold. Subsequently, the work includes strength analysis of the designed turbine housing. The aim of the thesis is to create components for the supply of separate pressure pulses as close as possible to the turbine. Furthermore, the modification of the existing turbine housing and the assessment of the functionality of the VNT mechanism after this modification and strength analysis. The final aim of this thesis is the creation of 2D and 3D technical documentation of newly designed and modified parts.
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Design of Turbine Safety Cover for Turbocharger
Mach, Petr ; Kudláček, Petr (referee) ; Novotný, Pavel (advisor)
This diploma thesis deals with the issue related to the burst covers of turbochargers, followed by the design of the safety cover for turbine housing, which works as a protective barrier in case of possible destruction of the turbocharger rotor. The design is created according to current knowledge from the containment testing and requirements for the highest level of safety during turbocharger operation. In this diploma thesis, there are made 2 new variants of burst cover. The first aims at a lower purchase price and it is suitable for applications where it is not necessary to have the highest protection level. The second variant aims to face the strictest conditions and uses reinforced walls, which makes it a more expensive product. For both designs of the burst cover, there is made an analysis of vibrations due to long-term trouble-free operation, which is followed by further modification of the design. In the last part, burst covers are checked for high-cycle material fatigue. The output of this diploma thesis are therefore two new designs of the safety covers that are suitable in terms of vibrations caused by the internal combustion engine.
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