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Simulation of ultrasonic wave in the composite aircraft structures
Cimrhanzl, Jan ; Koštial, Rostislav (referee) ; Šplíchal, Jan (advisor)
V této diplomové práci jsou popsané SHM metody používané v letectví a dále jsou udělány MKP simulace šíření ultrazvoukových vln v celokompozitním tenkostěnném materiálu používaném u leteckých konstrukcí. Pro simulaci byla zvolena SHM metoda nazývaná pitch-catch. Simulace byla provedena na dvou různých kompozitových materiálech a každý z nich byl testován třemí různými konfiguracemi s trhlinou a jednou konfigurací bez trhliny. Jako prepocessor byl použit MSC.Patran a jako post processory byli použity MSC.Nastran a MSC.Dytran, jejichž výsledky byli na závěr porovnány. Simulace prokázali, že rychlost šíření a amplituda vln šířících se v simulovaném panelu je trhlinami ovlivněna. Při konfiguracích s trhlinami rychlost šíření i amplituda vln byli menší, než v případě bez trhliny. Jako vhodnější post processor při MKP simulacích se ukázal MSC.Nastran, jehož výsledky byli přesnější a zárověň bylo i snažší správně odečítat hodnoty dat z grafů pro podrobnější pozorování šíření vln.
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Methodology of temperature measurement behind jet engine
Koutný, Martin ; Koštial, Rostislav (referee) ; Matějů, Jiří (advisor)
This thesis is focused on temperature measurement behind jet engine. The theoretical part introduces chosen ways of temperature measurement. The practical part is divided into design (and later assembly) of the measuring stand, methodology of measurement and the measurement itself. The main outcome are heat maps gained by measuring temperatures behind TJ – 42 jet engine.
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Development in pure jet engine and production survey
Štefanovič, Peter ; Koštial, Rostislav (referee) ; Šplíchal, Miroslav (advisor)
The main object of this bachelor thesis is a comprehensive review of jet engines. The thesis briefly explains the broad issue of gas turbines in terms of their operation and various advantages and disadvantages. Then it presents particular application areas. At the beginning it notes the history and introduction of jet engines to the significant field of aviation. The main part focuses also on the current manufacturing of individual types of engines with technical data. In the last section there are classified provisional steps which could affect or improve some parameters. In the end of the bachelor thesis trends and developments are suggested.
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Analysis of multicopter design concepts
Zeman, Petr ; Koštial, Rostislav (referee) ; Dvořák, Petr (advisor)
The main objective of this thesis is to design multicopter with very high flight endurance compared with commonly achieved performances. The beginning is devoted to description of the commonly used terms and components on multicopters with MTOW up to 20kg. This part is followed by detecting dependencies of parameters between themselves from parametric analysis commercially available platforms. Subsequently are investigated factors affecting the efficiency of the propulsion unit like motor location on the arm and the voltage of the battery. Next is done comparison in terms of efficiency of configuration with one motor per arm and two motors in coaxial arrangement. In research the coaxial configuration one part is dedicated to the determination of the efficiency at different speeds of two motors and different directions of propeller rotation relative to each other. Subsequently is determined reference characteristic for efficiency of propulsion units with different weights. Especially in connection with the next part is here shown comparison of Li-Ion and Li-Po battery. The last part is about design multicopter based on previous findings.
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OSD data system design of small transport aircraft for training of maintenance personnel
Plačková, Veronika ; Jiří, Duda (referee) ; Koštial, Rostislav (advisor)
This master’s thesis describes the area of operational suitability data that is established as part of the aircraft type certificate. The thesis first chapters are describing OSD, its origin and implementation. The thesis also analyzes all regulations that are connected with this matter and are focusing on the training of maintenance certifying staff. A part of this thesis deals with the description of aircraft Evektor EV-55 Outback, for which is created the educational material, and a description of its fuel system. The concept of educational material for maintenance certifying staff theoretical type rating training and an example of final test are at the end of the thesis.
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Evaluation of advantages and disadvantages of aircraft automatic systems
Vrána, Michal ; Koštial, Rostislav (referee) ; Horpatzká, Michaela (advisor)
This bachelor’s thesis deals with civil airplane automatic systems. The first part analyses historical development of flight control systems and automatic system together with philosophy, which is implemented in modern airliners. In the next part, we evaluate advantages and disadvantages together with list and description of modern avionic systems, which participate on automatic flight. In the last part, selected airplane incidents and accidents are analysed, focusing on influence of automation with incidental human factor.
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