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Analysis of the influence of body position on the car's aerodynamic characteristics
Jirásek, Lukáš ; Svída, David (referee) ; Vančura, Jan (advisor)
Aim of this diploma thesis is to make sensitivity research concerning influence of vehicle body position on its aerodynamical loading. CAD model was created in Pro/E software. Formula Ford 1600 chassis and vehicle body dimensions were used as a pattern for CAD model. Then this model was imported into CFD environment where ambient medium characteristic were set up. FLUENT software performed calculations and measurement of aerodynamical characteristics of vehicle dependent on height and angle of chassis.
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Increase of Charging Efficiency of Two Stroke Engine
Mainuš, Jiří ; Maršálek, Ondřej (referee) ; Svída, David (advisor)
The diploma thesis introduces a design of a construction alteration whose aim is to increase the injection efficiency of the given two-stroke engine. The first chapter deals with a construction solution of the replacement of cylinder charge. The following chapters focus on the procedure of creating a 3D model of a cylinder unit through reverse engineering. Furthermore, the thesis contains a CFD simulation of the fluid flow including the evaluation of the results and experimental measurement on an aerodynamic track.
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Increasing Efficiency of Intake Port for SI Engine
Herka, Miroslav ; Drápal, Lubomír (referee) ; Svída, David (advisor)
The thesis describes design solutions the inlet port of the modern combustion engine. The thesis describes basic properties of the inlet port and the types of flow. It is focused the experimental measure of the real inlet port engine Husaberg. The results of the experimental measure are compared with results of the simulation in software CFD. Moreover, it describes creation of 3D parametric model in software Pro/Engineer based on the real geometry exquired from software ATOS. At the end of the work are compared with results of the simulation origin geometry inlet port with origin inlet valve with different changes shapes of valve.
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Fuels in 21. century
Lébl, Jan ; Svída, David (referee) ; Dundálek, Radim (advisor)
This bachelor’s thesis is intent on introducing the overview of particular types of fuels used at present for ignition and diesel internal combustion engines. Marginally is mentioned the theme of fuels used for fuel cells. Further it deals with the composition of each fuel types and their characteristics and ecological aspects of their use. The ending of the thesis is aimed to formulation of the development trends in fuels and the prospects of each fuel type’s expansion in the future.
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Thermodynamic Analysis of Internal Combustion Engine
Čajka, Lukáš ; Drápal, Lubomír (referee) ; Svída, David (advisor)
This thesis deals with analysis of the thermodynamics of the internal combustion engine. A survey on individual types of sensors used to measure pressure in combustion chamber is stated in the introductory part of the thesis. Another section deals with design of measuring chain. The main subject matter deals with compilation of the calculation program pertaining to the analysis of indicator diagram. Evaluation the results and procedures are included in the conclusion.
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Thermodynamic model of Wankel engine with output power 11 kW
Drbal, Milan ; Beran, Martin (referee) ; Svída, David (advisor)
The master’s thesis deals with the Wankel rotary engines and their 1D simulations using a thermodynamic simulation software for the piston engines. The necessary steps for creation of the equivalent model of the four-stroke three-cylinder combustion engine are provided. The engine used for the validation model was Aixro XR 50. The data measured on this engine during testing were used to validate the created thermodynamic model. The discharge coefficient calculation of the intake and the exhaust ports is shown. The 11kW engine design is created using validated thermodynamic model.
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Student Formula Arrangement Design
Niesner, Martin ; Svída, David (referee) ; Ramík, Pavel (advisor)
The rules and specifications of competition Formula Student are the main guidelines at frame design of students' formula. This diploma work discusses frame safety and structural requirements and also requirements on mounting of engine, single axles, rear-axle differential, engine intake and exhaust system, fuel tank, control elements, and so on. In the final parts of this diploma work analysis of maximum state of stress in material of on-load frame is made and total frame torsional rigidity is calculated. Total frame torsional rigidity is compared with those of Formula Ford and with other variants of Formula Student.
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Turbocharger Regulating VNT Mechanism Load Simulation
Cetkovský, Martin ; Svída, David (referee) ; Vančura, Jan (advisor)
This diploma thesis deals with turbochargers with a focus on the ways of their regulation. The main subject is to design CFD simulation for a turbocharger with VNT mechanism at specific positions. Simulation is based on the turbocharger Garrett by Honeywell, for which measurement was realized. Finally torques acting on the vanes are evaluated from the simulation. The means of results improvement are considered at the end of the thesis.
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Optimalization of Exhaust Manifold for SI Engine
Prášek, Martin ; Beran, Martin (referee) ; Svída, David (advisor)
The master thesis is focused on optimizing existing or proposal for a new exhaust tracts on the Volkswagen Polo moving series rally-cross A1 division. The car is powered by concern, water-cooled, atmospheric engine capacity 1599 ccm. To achieve the objectives of the lessons are applied as a theoretical nature (analytical calculation), especially the advanced approaches of the software environment from the firm Lotus. Exhaust treatment systems are designed to suit all rules FIA Sports Association.
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Increasing Single Cylinder SI Two-Stroke Engine Performance
Stejskal, Miroslav ; Drápal, Lubomír (referee) ; Svída, David (advisor)
This thesis deals with two-stroke engine design modifications to enhance its performance parameters. The introduction summarizes the various solutions of two-stroke engines. The next part deals with design modifications of the engine power, their implementation and subsequent modification. The work includes strain and stress analysis of the piston, which includes a complete indication of pressures in two-stroke engine. The achieved results of FEM analysis were used to design better piston geometry.
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