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Item Wing magnetohydrodynamic facility of aircraft propulsion system(University of Zilina, 2021) Miča, Pavol; Čerňan, JozefMagnetohydrodynamics is one of the relatively new fields of physics studying the dynamics of magnetic fields in electrically conductive fluids. The implementation using magnetohydrodynamic principles applied to aircraft propulsion systems is so far only in a range of experiments. So far, real applications have occurred only a few times and always only at the level of experiments and prototypes. In my paper, I deal with the application of a magnetohydrodynamic device built into the wing of an airplane. This means should work as a secondary type of drive in cooperation with the primary drive, which is represented by a turbofan motor. The device´s main function is to reduce the fuel requirements of the primary drive and reduce noise and other harmful emissions. The work also includes drawings created in the program AutoCAD, where I designed the location and implementation of a wing magnetohydrodynamic device in the wing of general construction. In this work, I also explore the advantages and disadvantages of using different tips of the primary drive. I am also researching the current state of the problem where I am analyzing the Japanese project of the YAMATO-1 semi-catamaran with magnetohydronymous propulsion and a prototype of an ion-powered crawler from IMT scientists. I also examine in detail all the theoretical knowledge concerning magnetohydrodynamics and wing design. Finally, I compare the advantages and disadvantages of using this tool as well as other technical issues related to construction. This work can serve as a basis for further future research into the application of magnetohydrodynamic principles in aviationItem Design optimization of a compressor stage with counter-rotating rotors(University of Zilina, 2021) Šajbanová, Kristína; Čerňan, JozefThe paper deals with the design optimization of the compressor stage with counter-rotating rotors, especially in order to create a model which, due to its parameters in real operation, would achieve the maximum possible values of efficiency. The primary goal of this work is to create a design of a compressor stage with counter-rotating rotors from a theoretical point of view. The compressor stage model is created using Inventor modelling software and the subsequent design evaluation and optimization is based on airflow analysis of the compressor stage using Ansys Discovery Live software. The secondary goal is to point out the existence and application of innovative and progressive technology of rapid prototyping in the world of aircraft component production and at the same time to emphasize its benefits in comparison with conventional production techniques applied in the initial stages of aircraft component production.Item Design of a bladeless engine compressor based on magnetohydrodynamics(University of Zilina, 2021) Stachová, Jana; Čerňan, JozefThis article is a technical analysis focusing on the design of a bladeless compressor based on magnetohydrodynamics and the possibilities of its use. The aim of this work is to design new solutions in the field of aircraft compressors and to provide a comprehensive overview of scientific information on the topic. Emphasis is also placed on acquainting the reader with the basic principles of magnetohydrodynamics and the possibilities of its application in the field of aircraft propulsion units. The work is a combination of professional research of scientific information in the field of plasma and magnetohydrodynamics and a practical part whose goal is to create new design of a bladeless compressor using scientific observation and modelling methods. This design was also examined in the work using the method of comparison, which aimed to examine the design and its behaviour in different configurations. The main goal was to combine essential and key information from the researched area and apply it in a completely new way in designing new solutions in issued areaItem Possible modifications of the automobile piston petrol engine for aircraft propulsion: cooling, starting and ignition system(University of Zilina, 2021) Malíková, Zuzana; Čerňan, JozefThe main goal of our work was to design a possible modification of the automobile piston petrol engine for aircraft propulsion and subsequently its implementation. The paper can be divided into four main units. The first part is aimed on the history and development of automobile and aircraft piston engines. We focused on their construction and gradual improvement of performance. The second unit is dedicated to theoretical knowledge of the cooling, starting and ignition systems. In the cooling system, we mainly described air cooling and the required components needed for that process. In the starting system, we paid attention to the necessity of starting gears, their types and uses. We described mainly electric starters and then we attached a diagram of the starting system. In the ignition system, we described the structural elements required for the process of igniting a mixture of fuel and air. In the following section, we described the engine used for aeroconversion, its parameters and the reason for its selection. In the last part we deal with the practical part of the paper. We created the component models needed for the complete construction of these systems, which were created in the computer program Autodesk Inventor Professional 2021. We prepared the cooling system for more efficient air cooling by adding deflectors, in the starting system we used a starter with a reducer to increase torque and reduce fuel consumption and in the ignition system, we proposed a modification of the flywheel made of dural material, which would reduce the overall weight of the engine. The result of our work is a finished design for aeroconversion of a flat four-cylinder engine. The modified engine is suitable for ultralight aircraft.Item Modification possibilities of automotive power plant for aviation purposes: fuel system and turbocharger system(University of Zilina, 2021) Pukač, Andrej; Čerňan, JozefThe objective of this article is to develop and demonstrate modification of automotive engine for aviation purposes. Automotive engine in aircraft has its pros and cons, but It can be good economical alternative to power plants such as Rotax engines which can be expensive, especially in Ultralight category where the rules of certification are different than for CS-LSA or CS-23 category aircraft. In first part I analyse actual state of real engine and describe operational problems, which shall be improved for better operation in aircraft. In second part I demonstrate practical solutions of turbocharger system and fuel system. In these systems I tried to use the most modern technologies which however will be reliable enough for aviation use, where the safety is priority number one.Item Design of lubrication system, design of motor bed, selecting of propeller for aircraft piston engine(University of Zilina, 2021) Suk, Michal; Čerňan, JozefI will briefly address the three orientations of my paper in this scientific article. I will not go into details in the article. In the first part I will briefly describe the design procedure of a piston engine lubrication system, the requirements that a lubrication system should meet with respect to different types of piston engines and their focus, elements of the lubrication system and the properties of oils as lubricating fluids.In the next part I will describe the types and constructions of aircraft engine beds, technical requirements for aircraft engine beds and individual loads that the aircraft engine bed must withstand. In the last part I will focus on aircraft propellers. I will explain the basic principle of the propeller, the individual rules for selecting a propeller for a piston engine, safety requirements for an aircraft propeller and the dividing of basic types of aircraft propellers for aircraft piston engines.Item System optimization demonstrator for aircraft propulsion technology using fuel cells(University of Zilina, 2021) Uhlár, Erik; Čerňan, JozefIn order to help accelerate transition to sustainable and eco-friendly personal transportation in a single engine piston aircraft category we’ve developed a simulation software platform of hydrogen powered aircraft for further research and development. Measurements were carried out on a real reference airplane Cessna 172 R and were crosschecked with an airplane flight manual as well as a computer flight simulation. We also focused on a software-based safety and economy optimization by components usage ratio improvement and inflight energy production and transfer limitations.Item Ignition systems of combustion piston engine and possibility of its optimization(University of Zilina, 2021) Vorlíček, Marek; Čerňan, JozefThis paper explains the basic definition of ignition, combustion and description of the ignition system functionality. The ignition systems are divided according to established criteriums into the most used types and descriptions of each ignition system components. It focuses on ignition timing and circumstances that affect it and how they influence the observed parameters. I am using ignition timing as an instrument for the observation and optimization of ignition. These practices are tested on piston engine in the practical part of this paper. It describes the modification of the timing curve, measuring of engine power and comparison between each curve. It is an analysis of engine performance under different conditions. The most efficient timing curve is chosen and further evaluated. The used engine for this paper was a rebuild from a car engine used in Trabant 601, VEB Automobilwerke automobile.Item POHONNÉ JEDNOTKY AKROBATICKÝCH LIETADIEL(Žilinská univerzita v Žiline, 2020) Dvoran, Filip; Čerňan, JozefThis paper aims to familiarize the reader with modifications of the engine parts of a light-sport aircraft necessary for aerial acrobatics. Modifications relating to the performance, operational capability, and resistance to the negative effects of the gravitational acceleration of acrobatic maneuvers to which the aircraft is subjected. First of all, the necessity of modification for the aircraft and its principle of operation is explained in the individual chapters. The secondary objective of the work is to introduce the design possibilities offered by manufacturing companies operating on the market, with the intention of the best product selection in the construction of acrobatic aircraft, with special requirements. The intention is to point out the factors that have to be taken into account when selecting products with their subsequent comparison in terms of technology used by the company for the best performance of the aircraft. The last chapter deals with the issue of aviation electrification, its use in aerobatic sports, and the advantages that the electric motor brings.Item MOŽNOSTI ZVYŠOVANIA VÝKONU LETECKÝCH PIESTOVÝCH MOTOROV A ICH VÝVOJ(Žilinská univerzita v Žiline, 2020) Goldschmidt, Jakub; Čerňan, JozefThe purpose of this paper is to refer to possibilities of increasing the power of the aircraft piston engine. In the first part of this thesis I analyze and point out, what in general aircraft piston engine is, what parts the engine is consisted of, and what types of piston engine we know. Further, it is focused on the types of these engines as well as the differences between them. At the core of this thesis I describe the possibilities for increasing the short-term power, or long-term power of the engines, their history and also their advantages and disadvantages.