Zvyšovanie bezpečnosti a kvality v civilnom letectve

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ANALYSIS OF JET ENGINE COMPONENTS HEAT RESISTANCE IMPROVEMENT BY TBC COATING
(Žilinská univerzita v Žiline, 2020) Čerňan, Jozef; Janovec, Michal; Cúttová, Miroslava
The operation of jet engines in aviation is a very challenging task also in view of the high demands on the safety of such an operation. One of the most dangerous phenomena that affects the safe operation of these engines is the unstable work of the compressor. The object of the research in this article is to find appropriate and simple way to improve heat resistance of the MPM-20 experimental engine components, suffered by high thermal load, which resulted in the destruction of its gas turbine. A metallographic and microscopic analysis was carried out on the experimental specimens improved by TBC coating for decreasing of thermal conductivity. The results of experiments with TBC coatings shows decrease of the sample temperature for samples covered with TBC coating comparing to samples withou it. This fact can contribute to the development of new surface treatment of jet engine components with higher heat resistance and better reliability.
FAILURE RATE ANALYSIS IN AIRCRAFT MAINTENANCE PROCEDURES
(Žilinská univerzita v Žiline, 2020) Bugaj, Martin; Pecho, Pavol; Janovec, Michal
An aircraft is a complex object composed of many complicated and interrelated parts, components and systems. Reliability of all parts and systems is very important to aircraft because operation of aircraft can affect flight safe directly. Aircraft failure rate is an important parameter of aircraft operation to maintain the effective level of reliability. The failure rate is the probability of failure at a point in time. When a part, component or system is not functional it can be upgraded through replacement or repair, and the condition of the aircraft is restored to some degree. We can defined several approaches to aircraft maintenance. There are maintenance can be based on condition, which is, items are repaired when they fail. Failure during operation can have serious consequences, so detection of items with a high probability of failure through periodic inspection is a major component of maintenance. This paper analyses how we can define the aircraft failure rate and its impact on operational reliability of aircraft.
KONSPEKT AKVIZÍCIE GEOPRIESTOROVÝCH DÁT PRE VYTVORENIE 3D MODELU REFERENČNÉHO LETISKA
(Žilinská univerzita v Žiline, 2020) Škultéty, Filip; Janovec, Michal
When rendering large scenarios for flight simulators, we encounter similar problems as in the case of scenes for cinematography or computer games. In the case of this work, we solve the rendering of the earth's surface for any camera configuration, and we try to maximize the quality of the rendered images without a visible decrease in the rendering frequency. The article is devoted to the creation of a reference model of the Piešťany airport (LZPP) as a part of the scenery for a certified flight simulator. The presented solution maintains a stable 60 frames per second when rendering the airport surface from any distance and direction.
METHODOLOGY FOR INSPECTION OF RIVETED SAMPLES BY THE ECA METHOD
(Žilinská univerzita v Žiline, 2020) Janovec, Michal; Čerňan, Jozef
The eddy current method is very often used technique of non-destructive testing and evaluation of materials. The method is very suitable for the detection of cracks that result from fatigue or cracking as a result of stress corrosion. Eddy current testing can be performed with minimal part preparation and a high degree of sensitivity. The eddy current method is used for the detection of surface and subsurface failures, corrosion in aircraft structures, holes for fixing various components and thread cracks. The paper describes the application of the eddy current method ECA in the inspection of riveted joints of the produced sample. The riveted sample is made of aluminum sheets and countersunk head rivets. Simulated damages are created around the rivet holes on the riveted specimen. Artificially formed notches simulate cracks around the rivet holes, and aluminum powder is used to simulate corrosion of aluminum sheets. These damages are then scanned with an Olympus OmniScan MX flaw defectoscop and the results of the measurements are evaluated in this article. SAB-067-005-032 and SBB-051-150-032 are used for non-destructive measurements.