Browsing by Author "Hrúz, Michal"

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Aircraft airfoils
(University of Žilina, 2023) Haluzová, Kristína; Bugaj, Martin; Hrúz, Michal
This work deals with the airfoils of aircraft. First of all, it focuses on the general properties of wings. Furthermore, the work deals with the issue of various types of wing shape and compares individual shapes of airfoils, their properties and gradual development. Next, current wings of commercial aircraft are described, dealing with the materials used, types of winglets, mechanization of the wing and also different uses of the airfoils. The work also describes and compares wings of two famous commercial airliners – Boeing 737-800 and Airbus A320-200. In the end, the work also focuses on various concepts of the wings of the future, and how sustainability affects future development.
Analysis of new progressive diagnistic methods in the area of aircraft maintenance
(University of Zilina, 2021) Supuka, Matej; Hrúz, Michal
In the area of aircraft maintenance, we commonly meet with the problem of corrosion, detection of which is one of the primary obstacles. Implementation of modern sensing techniques has a potential to bring many benefits. The objective of this work is to analyze technologies, their potential applications, and viability of switching to autonomous detection using computer aided sensing. Primary source of information were research articles from science databases such as ResearchGate and ScienceDirect. Available documents were analyzed and subsequently, useful information was extracted. First part deals with theretical knowledge about corrosion, based on which potential technologies were chosen. Those were then described, and their viability was analyzed, based on how well they could achieve our goals. Selected technologies have shown potential, however necessary solutions could not be found to enable fully switching tou autonomous computer detection. Although data acquired show many potential benefits that could arise from partial implementation of these technologies combined fith old fashioned visual inspection.
Design procedure and honeycomb screen implementation to the air transtport department’s subsonic wind tunnel
(University of Zilina, 2020) Hrúz, Michal; Pecho, Pavol; Bugaj, Martin
Wind tunnels are the most widely used tools when comes to validation of Reynold number. Most of wind tunnels use various air straighteners or flow conditioners to achieve as most unified air flow as it’s possible. This article deals with design and creation procedure of air flow straightener – honeycomb screen. Based on mathematical relations and empirical experience defines dimensions and characteristics for subsonic wind tunnel of the Air Transport Department of University of Žilina. Wind tunnel equipped with a suitable screen provides more relevant and accurate data, which are crucial for final validation of results of test objects.
Experimental state of thrust testing of aircraft reciprocating internal combustion engine
(University of Zilina, 2020) Mrva, Matúš; Pecho, Pavol; Hrúz, Michal; Škvareková, Iveta; Bugaj, Martin
The project “Experimental State of Thrust Testing of Aircraft Reciprocating Internal Combustion Engine” is aimed at creating a complex measuring device in order to obtain selected characteristics and parameters of the engine using different types of propellers. In addition to the basic measured parameters such as. thrust, temperature, speed and fuel flow will be a state of the art to test the latest prototype propellers designed for aircraft models. After its construction, the experimental state will be used as a study aid for testing various types of conventional as well as currently developed propellers, engine characteristics and teaching of the whole equipment in the process of teaching, training of aircraft mechanics and for presentation purposes of the University of Žilina.
NÁVRH A KONŠTRUKCIA MODELU DEMONŠTRAČNÉHO AERODYNAMICKÉHO TUNELA
(Žilinská univerzita v Žiline, 2020) Hrúz, Michal; Pecho, Pavol
The paper is focused on the creation of a fully functional demonstrational model of a subsonic wind tunnel with integrated accessories, using low air velocities to perform test analyses. The analyses take place in the form of visual demonstrations of the air flow behavior around various solids and also in the form of computational tasks. The paper describes the use of theoretical knowledge and laws in the field of aerodynamics and their subsequent connection to the design and construction of the model, while its dimensions must meet the strict requirements for subsequent placement. The demonstrational model provides the necessary equipment for research in the aerospace and, in part, automotive industries. It provides conditions for student research and fully covers the teaching processes of Air Transport Department.
Study of reinforcement design h-profile of aircraft wing spar
(University of Zilina, 2020) Pecho, Pavol; Magdolenová, Paulína; Hrúz, Michal; Kováčik, Pavel; Škvareková, Iveta
In today's world, with ever-increasing safety requirements, there is a growing demand to maintain or reduce production costs. In aviation, in addition to factors like weight and related variables such as resistance to vibration, corrosion, temperature and other are also considered. The task of this paper is to analyse unconventional designs of wing beams with respect to the current requirements of the aviation industry. In the article, the authors analyse the possibilities of design modification either by adding ribs to the profile, or by changing the cross-section of the profile itself. In practice, such design changes would increase weight, production time and finances, but also increase strength and thus safety. All proposed changes were subjected to strength analyses by FEM (Finite element method) computer simulations. The article output is the selection of suitable designs for further observation and experimental verification to ensure comprehensive results for the possibility of implementation in practice. Despite the non-traditional shapes of the proposed wing beam cross-sections, the authors assume that traditional beam shapes will be gradually modified more efficiently.
Využití metod vibrační analýzy pro kontinuální sledování technického stavu kritických prvků leteckého turbínového motoru
(University of Žilina, 2024) Mrakvia, Dominik Michael; Hrúz, Michal
The reliable operation of an aircraft turbine engine is critical to the safety, regularity and economy of airline operations. Existing methods for vibration diagnostics of jet engines have provided valuable information on potential problems and have proven to be an important and irreplaceable tool for jet engine maintenance, especially for predictive maintenance. However, real-time vibration diagnostics of critical components of in-service jet engines is only marginally used and its full potential is not being realised. The main objective of this work is to verify the use of vibration analysis methods currently used in the diagnostic processes of continuous condition monitoring of aircraft jet engines and, in addition, new advanced analysis methods in the environment of a newly designed vibrodiagnostic setup for the purpose of simulating selected types of damage to critical parts of an aircraft turbine engine. The first sub-target is to design, develop and verify the functionality of the vibrodiagnostic assembly for data acquisition and subsequent analysis. The second sub-task is to monitor and record vibrodiagnostic data using an accelerometer. The nature of each simulated condition is determined using vibration signal analysis methods. This provides a small-scale analogy to the diagnostic processes of critical elements of an aircraft turbine engine. The thesis also focuses on the potential for innovation in this area, particularly by improving the use of measured data. The results of the analysis are used to develop a proposal for a possible vibration monitoring system for use in engines currently in service.
Wing platforms of supersonic aircraft
(University of Žilina, 2023) Tabernaus, Richard; Bugaj, Martin; Hrúz, Michal
Goal of the paper is to describe various wing designs used in supersonic aircraft and their impact on lift, drag and stability with emphasis on high speed civil transport. Paper describes transonic and supersonic region, where formation of shockwaves is prevalent, and air behaves differently from subsonic region. The paper then describes different wing configurations and planforms affect the formation of lift and drag with emphasis on straight wing, swept wing and delta wing planfroms. It also provides insight into the history and the present research of supersonic flight with emphasis on civil transport.