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Intake system for internal combustion engines
Hadrava, Martin ; Zháňal, Lubor (referee) ; Vančura, Jan (advisor)
The bachelor’s thesis is focused on the internal combustion engine intake systems. Emphasis is placed mainly on the construction and the various parts of the intake systems. The part of the work is also devoted to the different types of supercharging. At the end, the individual parts of the intake system are described further.
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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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Proposal of company´s E-marketing
Hadrava, Martin ; Matějka, Jiří (referee) ; Dvořák, Jiří (advisor)
Thesis contains the basic theoretical resources for processing e-marketing of company; it offers two options of problems solving proposals. The first option contains basic web presentation with SEO optimalization. The second option, which is superstructure of the first one, is enriched by advertising activities on internet, which direct the user to the visiting of websites. These suggestions are consequently evaluated from the economical point of view.
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Cabin recreation in the district of Jihlava (development, territorial dislocation and typology)
HADRAVA, Martin
My graduation theses is about recreation in the cabins in region Jihlava territory. The most of nessesery data for this work was finding by field survey. Family weekend cabins, family weekend cabin-houses in a village, garden cabins, small brick-built garden cabins and architektonic-building specific cabins was identifiabled. There was found 3872 cabins in 120 cabin areas in all. There is analysis of cabins settlement layout and it´s differentiation in my graduation theses. Characteristics of cabins settlement was processing in summary sheets, which are in my work too. There is collation of two different cabin settlementes in this graduation theses.
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Numerical solution of flows in time dependent domains with elastic walls
Hadrava, Martin
Title: Numerical solution of flows in time dependent domains with elastic walls Author: Martin Hadrava Department: Department of Numerical Mathematics Supervisor: prof. RNDr. Miloslav Feistauer, DrSc., dr. h. c. Supervisor's e-mail address: feist@karlin.mff.cuni.cz Abstract: This work is devoted to the numerical solution of flow in time dependent domains with elastic walls. This problem has several applications in engineering and medicine. The flow is described by the system of Navier-Stokes equations supplemented with suitable initial and boundary conditions. A part of the boundary of the region oc- cupied by the fluid is represented by an elastic wall, whose deformation is described by a hyperbolic partial differential equation with initial and boundary conditions. Its right- hand side represents the force by which the fluid flow acts on the elastic wall. The goal of this work is to elaborate a numerical method for solving this coupled problem based on the finite element method and the ALE formulation of the equations describing flow. A for- mulation and analysis of the problem together with discretization, algorithmisation and programming of modules, which were added to an existing software package, is presented. The method that was worked out is applied to solve test problems. Keywords: interaction of flow and an...
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Numerical solution of flows in time dependent domains with elastic walls
Hadrava, Martin
Title: Numerical solution of flows in time dependent domains with elastic walls Author: Martin Hadrava Department: Department of Numerical Mathematics Supervisor: prof. RNDr. Miloslav Feistauer, DrSc., dr. h. c. Supervisor's e-mail address: feist@karlin.mff.cuni.cz Abstract: This work is devoted to the numerical solution of flow in time dependent domains with elastic walls. This problem has several applications in engineering and medicine. The flow is described by the system of Navier-Stokes equations supplemented with suitable initial and boundary conditions. A part of the boundary of the region oc- cupied by the fluid is represented by an elastic wall, whose deformation is described by a hyperbolic partial differential equation with initial and boundary conditions. Its right- hand side represents the force by which the fluid flow acts on the elastic wall. The goal of this work is to elaborate a numerical method for solving this coupled problem based on the finite element method and the ALE formulation of the equations describing flow. A for- mulation and analysis of the problem together with discretization, algorithmisation and programming of modules, which were added to an existing software package, is presented. The method that was worked out is applied to solve test problems. Keywords: interaction of flow and an...
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Numerical solution of flows in time dependent domains with elastic walls
Hadrava, Martin ; Feistauer, Miloslav (advisor) ; Felcman, Jiří (referee)
Title: Numerical solution of flows in time dependent domains with elastic walls Author: Martin Hadrava Department: Department of Numerical Mathematics Supervisor: prof. RNDr. Miloslav Feistauer, DrSc., dr. h. c. Supervisor's e-mail address: feist@karlin.mff.cuni.cz Abstract: This work is devoted to the numerical solution of flow in time dependent domains with elastic walls. This problem has several applications in engineering and medicine. The flow is described by the system of Navier-Stokes equations supplemented with suitable initial and boundary conditions. A part of the boundary of the region oc- cupied by the fluid is represented by an elastic wall, whose deformation is described by a hyperbolic partial differential equation with initial and boundary conditions. Its right- hand side represents the force by which the fluid flow acts on the elastic wall. The goal of this work is to elaborate a numerical method for solving this coupled problem based on the finite element method and the ALE formulation of the equations describing flow. A for- mulation and analysis of the problem together with discretization, algorithmisation and programming of modules, which were added to an existing software package, is presented. The method that was worked out is applied to solve test problems. Keywords: interaction of flow and an...
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Proposal of company´s E-marketing
Hadrava, Martin ; Matějka, Jiří (referee) ; Dvořák, Jiří (advisor)
Thesis contains the basic theoretical resources for processing e-marketing of company; it offers two options of problems solving proposals. The first option contains basic web presentation with SEO optimalization. The second option, which is superstructure of the first one, is enriched by advertising activities on internet, which direct the user to the visiting of websites. These suggestions are consequently evaluated from the economical point of view.
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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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