Theses (Department of Vehicles Engineering)

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https://hdl.handle.net/2437/360725

Theses collection of the Faculty of Engineering.

Böngészés

Megjelenítve 1 - 20 (Összesen 31)

Korlátozottan hozzáférhető
A comparative analysis of Instrument Landing System and Ground-Based Augmentation System Landing System for aircraft landing guidance
Azjargal, Gombo-Ochir; Géza, Husi; DE--Műszaki Kar
Achieving a successful aircraft landing demands reliable and safe approach guidance, particularly under low visibility conditions. Although various aircraft landing guidance systems coexist in aviation, this thesis concentrates on a comparative analysis of the Instrument Landing System (ILS) and the Ground-Based Augmentation System Landing System (GLS) from multiple perspectives. The fundamental principles of each system are explained in detail to provide distinction between their operational and technical characteristics as well as their working mechanisms. Core differences and similarities between ILS and GLS are subsequently compared in terms of accuracy, reliability, safety, and economic considerations. Furthermore, a case study is presented to illustrate the current application of both systems, followed by future trends in landing guidance technologies. Through this comparative analysis, the thesis provides a comprehensive understanding of ILS and GLS, including their distinctions and potential contributions to aviation.
Korlátozottan hozzáférhető
Aircraft Maintenance
Al Masoud, Hamza; Menyhárt , József; DE--Műszaki Kar
The thesis looks at key areas of aircraft maintenance and engineering organizations, emphasizing the importance of Total Productive Maintenance (TPM) in aviation. It dives into ideas for improving maintenance operations to increase aircraft availability and dependability. The research focuses on the relevance of landing gear within this paradigm, recognizing their important role in aircraft safety and functionality. By using TPM concepts, the study hopes to improve overall efficiency, minimize downtime, and extend the Mean Time Between Failures (MTBF). The thesis conducts a thorough investigation of the dynamic linkages between engineering organizations, TPM implementation, MTBF extension, and the critical function of landing gears in maintaining aircraft operational integrity. This research aims to give significant insights into the complexities of airline maintenance management.
Korlátozottan hozzáférhető
An overview of PW150A engine, its design, and performance
Momes, Erick Japhet; Kostyák, Ferenc; DE--Műszaki Kar
This thesis aimed at describing the operational details of a turboprop engine, focusing on the PW150A. Different sections of the engine design have been illustrated with their key components. The engine performance has been studied and its calculated value presented, some of the data are assumed due to their sensitive nature that they are kept confidential by the manufacturer. The possible upgrades will be focusing on improving the material used in the design and also lowering emission.
Korlátozottan hozzáférhető
Beyond the skies: The historic evolution of jet engines
Nassar, Seif; Géza, Husi; DE--Műszaki Kar
In my thesis, the beginning of the jet engine and the pioneer inventors are discussed. the contrebution of Hans Von Ohain and Sir Frank Whittle, and their efforts were illustrated briefly with their impact on the industry. The pre-jet era was described when reciprocating engines were prevalent on aircraft designs. Early jet designs such as Turbojets and pulse jets were explained, and the impact on fuel economy presented by further developments giving birth to Turbofan engines was emphasized. Supersonic propulsion jets were explained, such as Ramjets and Scramjets, and a comparison between them was made. A scientific thrust calculation of an Ideal Ramjet engine is presented with a calculation sample. Airlines future expectations from engine manufacturers was discussed with three examples of the most advanced engines in the making or already in service.
Korlátozottan hozzáférhető
CORRELATION BETWEEN HUMAN FACTORS AND AVIATION ACCIDENTS, AND MANUFACTURERS AND CIVIL AVIATION AUTHORITIES' ROLES IN MITIGATING THEM
Hossain Safkat, Mohaimanul; Geza, Husi; DE--Műszaki Kar
This thesis explores the critical role of human factors in aviation accidents and examines the efforts of manufacturers and civil aviation authorities to mitigate these risks. It categorizes human factors into errors, psychological and physical issues, and organizational flaws, highlighting their significant impact on aviation safety. The study evaluates current safety measures, including Crew Resource Management (CRM), Safety Management Systems (SMS), and Threat and Error Management (TEM), while identifying gaps in implementation. It emphasizes the importance of proactive regulatory frameworks, continuous training, and fostering a culture of safety awareness. The research offers insights into enhancing aviation safety and reducing accidents by analyzing roles and regulations from organizations like the FAA, EASA, and ICAO.
Korlátozottan hozzáférhető
COVID 19 IN AVIATION - IMPACTS, COMPARATIVES AND SOLUTIONS
Gomes Pereira, Henrique; Husi, Géza; DE--Műszaki Kar
The thesis "COVID-19 in Aviation: Impacts, Comparatives, and Solutions" explores the severe effects of the COVID-19 pandemic on aviation, particularly in Brazil and Europe. It highlights drastic declines in passenger traffic and financial losses. The study examines technological advancements like HEPA filtration and UV disinfection systems used to enhance safety. It contrasts the responses of Brazil and Europe, noting Europe's support measures and Brazil's growth potential in the low-cost airline sector. The thesis emphasizes the industry's resilience and the importance of innovative solutions for future crisis management.
Korlátozottan hozzáférhető
Design of a partial cowling attached to a Propfan Engine to aid in noise reduction
Ekochu, Luke; Abdullah, Masuk; DE--Műszaki Kar
The Propfan engine, a revolutionary design that combines the benefits of turbofan and turboprop engines, has been revived in the aviation industry after being abandoned 40 years ago. Engineers eliminated the cowling on a turbofan engine and attached propellor blades, creating a highly fuel-efficient and powerful engine but causing noise. This issue and regulatory issues made it difficult to use. Modern technology has improved methods to reduce noise, including propeller blade design and computational fluid dynamics. Partial cowlings, a concept tested on turbofan engines, have not been fully explored for propfans. This paper investigates the potential benefits of partial cowlings in propfan engine design and performance, aiming to improve their perception among stakeholders in the aviation industry. The study aims to test the effect of partial cowlings on propfan engine performance and design.
Korlátozottan hozzáférhető
Dynamics of Subsonic Airflow and Integration of a Home Simulator Setup
Uygun, Alim; Erdei, Timothy István; DE--Műszaki Kar
I have written basics of wings in my thesis as literature review and I also searched and added simulation side of pilot training and my HeadTrack which I built it in my home with my equipments and my own budget.
Korlátozottan hozzáférhető
Enhancing Sustainability in Aviation
Shedeed, Mohamed; József, Menyhárt; DE--Műszaki Kar
The thesis explores sustainable aviation's pursuit to reduce carbon emissions, focusing on technology, air traffic management, and socio-economic aspects. It questions the inherent sustainability of aviation, comparing it with other transportation modes. Solutions for aviation sustainability encompass airport infrastructure improvements, sustainable ground vehicles, and innovative use of aircraft airframes for energy generation. Initiatives to raise passenger awareness and facilities promoting sustainability are highlighted, addressing time wastage issues associated with air travel. The thesis concludes by discussing sustainable aviation fuel options, emphasizing the potential for decarbonization and increased efficiency in reducing greenhouse gas emissions.
Korlátozottan hozzáférhető
Environmental and sustainable aspects of aviation: emission of pollutants and particles, sustainable aviation fuel and electromobility
Baigalmaa, Baljingarma; Bellér, Gábor; DE--Műszaki Kar
Aircraft operations contribute to climate through a series of complex processes, including the emission of greenhouse gas (GHG), particulate matter, and contrail formation. Global aviation is responsible for approximately 2.4 percent of annual anthropogenic carbon dioxide emissions and has contributed 4 percent to global warming to date. In 2015, the Paris Agreement was established with the long-term ambition of limiting the temperature rise to 2 Celsius degrees this century. In response, the aviation sector has begun making the shift toward more sustainable practices to reach carbon net zero by 2050. Among various measures and mitigation strategies, sustainable aviation fuel and electrification of aircrafts have become focus areas. However, some of the emissions and sustainable implications of these solutions are overlooked by the industry. The present work provides brief reviews on them.
Korlátozottan hozzáférhető
Evaluating the development of the Airbus A320 aeroplane
Majtényi, Boldizsár; Husi, Géza; DE--Műszaki Kar
The Airbus A320 program is one of the most successful commercial aircraft programs in the history of aviation. This thesis offers a comprehensive examination of the program. Trough the history and context, with a particular focus on the significant turning points in its evolution is also discussed in this study. The fly-by-wire technology, composites, and sophisticated aerodynamics are only some of the breakthroughs and technologies that are investigated in this research. In the thesis, the difficulties in engineering that arose throughout the production of the airplane are analysed, as are the strategies that were utilized to find answers to those difficulties. Further discussion analyses the topics such as the utilization of modern materials and its impact on the aviation industry, including its economic benefits. In conclusion, the thesis offers an assessment of both the present standing of the A320 program and its potential in the years to come. This thesis, in its whole, makes a contribution to a deeper understanding of the A320 program and the impact it has had on the aviation industry.
Korlátozottan hozzáférhető
Flightpath to a greener future: the use of sustainable aviation fuels in commercial aviation over the next decades
Benitez Luna, Gustavo Adolfo; Géza, Husi; DE--Műszaki Kar
The commercial aviation industry must significantly reduce its environmental impact caused by emissions. The International Civil Aviation Organization (ICAO) has implemented the Carbon Offsetting and Reduction Scheme for International Aviation (CORSIA), consisting of two separate phases and setting voluntary standards for carbon reduction in the aviation sector. To comply with the requirements established by the ICAO, it will be imperative to surpass a 30% threshold for the use of Sustainable Aviation Fuels (SAF) in relation to the total consumption of jet fuel by the year 2040.
Korlátozottan hozzáférhető
From the First to the Future The Technical Development and Future Directions of Global Navigation Satellite Systems Its impact on Civil Aviation Navigation
Filipovic, Aleksandar; Géza, Husi; DE--Műszaki Kar
The invention of Global Navigation Satellite System, GNSS, have entirely transformed the world. These systems include GPS (Global Positioning System), GLONASS (Global Navigation Satellite System), Galileo and Beidou, have become key element in many of widely spread industries, including civil aviation navigation. During the past 4 decades, GNSS has undergone significant technical development, starting from its initial introduction in the 1970s to the current significantly upgraded systems that are being used today. With exponentially improving GNS systems, it has become increasingly important to understand its process of development and its impact on civil aviation navigation. The objective of this thesis work is to provide an overview of general operating principle of GNSS; the first GNSS rated for use during IMC for air operations ; overview and comparison of current GNSS systems and finally future state-of-art GNSS. Additionally, this thesis aims to explore the impact of GNSS on civil aviation navigation, including its challenges, benefits and potential disadvantages and risks.
Korlátozottan hozzáférhető
Future of Aviation-Hybrid and Electric Aircraft
Ridwan, Roufun; Menyhárt, József; DE--Műszaki Kar
With few commercial aircraft in service, the electric aircraft industry is still developing. Creating dependable battery technology for extended flights and infrastructure for maintenance and charging present challenges. The thesis looks at how aviation might alter because of electric aircraft technology. In the rapidly growing aircraft sector, cryogenic superconducting propulsion for hybrid and all-electric aircraft is becoming more and more widespread. HEA is composed of mechanical and electrical parts, with additional energy coming from batteries and combustion-type power sources. With an emphasis on Urban Air Mobility applications and advancements in power electronics converters, electromagnetic design, thermal engines, and control techniques, the aircraft industry is investigating novel propulsion technologies for environmental reasons. Superconducting materials could increase the efficiency and compactness of aircraft electric propulsion in higher-specific-power electric motors. Aviation-compatible battery development is difficult to forecast, but with improvements in cell chemistry and pack design, 500 Wh/kg battery packs may be accessible in the mid-2030s. To develop long-range battery technology and evaluate the impact of electric aviation on local grids, industry, academia, and government must work together.
Korlátozottan hozzáférhető
Human performance and safety in highly automated aviation systems
Goes Barreto, Lua; Menyhárt, József; DE--Műszaki Kar
The primary aim of this research is to examine the evolution of technology and its consequential impact on safety in aviation operations throughout the years. Additionally, the study explores the intersection of human performance safety issues with the adoption of highly automated systems, as well as how individuals adapt to and manage the varying levels of automation in flight operations. Furthermore, it investigates the strategies and approaches employed by the aviation industry to address the challenges arising from technological advancements.
Korlátozottan hozzáférhető
Impact of Hydraulic System Design on Aircraft Weight and Fuel Efficiency
Yadav, Amrita; Abdullah, Masuk; DE--Műszaki Kar
Hydraulic systems are vital in modern aircraft, supporting functions like flight control, landing gear, and braking. However, their high weight impacts fuel efficiency and operational costs. This research explores incorporating lightweight materials such as titanium alloys, aluminum alloys, and fiber-reinforced composites into hydraulic actuator design. These materials exhibit high strength, biocompatibility, and resilience under extreme conditions. Using computational analysis and parametric studies, the study demonstrates that lighter actuators improve fuel efficiency, reduce greenhouse gas emissions, and enhance sustainability. It also evaluates the lifecycle benefits of material substitution, including cost reductions and compliance with low-flammability standards. The findings suggest that material innovations could revolutionize hydraulic systems, improving efficiency and environmental performance in aerospace applications.
Korlátozottan hozzáférhető
Investigation into the use of Segmented Control Surfaces in Aircrafts
Bawa, Asulada; Abdullah, Masuk; DE--Műszaki Kar
This thesis explores the use of segmented control surfaces in modern aircraft for improved aerodynamic performance, redundancy, and adaptability. Using computational and experimental approaches, it demonstrates higher efficiency and structural benefits, particularly for UAV flights and high-performance aircraft. The research addresses challenges in actuation, integration, and certification, focusing on advanced materials and modular design for scalability. Future applications include military, UAV, and commercial aviation, offering advantages like noise reduction, acoustic performance, passenger comfort, and environmental sustainability.
Korlátozottan hozzáférhető
Morphing Airfoil Design for Enhanced Aerodynamic Performance
Chaafi, Melek; Abdullah, Masuk; DE--Műszaki Kar
This thesis investigates the design and evaluation of a morphing airfoil mechanism to improve aerodynamic performance over a wide range of flight regimes. The proposed design uses a cable-driven mechanism attached to a cylindrical actuator and a double-pulley system to achieve the ability to actively change its shape. The application of this mechanism would be increased lift during takeoff, decreased drag during cruise, and improved stability during descent. This study is focused on a NACA0012 airfoil profile, the deflection angle and angle of attack are varied and its effect on aerodynamic forces, pressure distribution and flow characteristics are analysed using computational fluid dynamics (CFD) in Ansys Fluent. Static material choices for the mechanism consist of CFRP (Carbon Fiber Reinforced Polymers) for flexibility / strength ratios for the airfoil outer skin, and Dyneema cables due to their high tensile and fatigue properties. Results show a prodigious effect of morphing mechanism on aerodynamic efficiency, which is possibly used in commercial aircrafts, UAVs and experimental aviation. Despite the auspicious results, including challenges around scale and 3D aerodynamic complexities still to be solved. This work advances the research field of adaptive airfoil technology with implications for future sustainable, efficient aerospace engineering.
Korlátozottan hozzáférhető
Mountainous Regions and Aviation Safety: Assessing Risks and Mitigation
Tilekmatova, Tinatin; Géza, Husi; DE--Műszaki Kar
This study explores the challenges and safety measures associated with aviation in mountainous regions. The thesis aims to identify and mitigate hazards specific to mountainous flying, such as weather-related issues and Controlled Flight Into Terrain (CFIT) incidents. Using an extensive review of existing literature and case studies, the study examines the formation and impact of adverse weather phenomena like turbulence, wind shear, and mountain waves. It highlights the critical role of advanced technologies and instruments, such as Terrain Awareness and Warning Systems (TAWS) and Synthetic Vision Systems (SVS), etc., in enhancing flight safety. The research also emphasizes the importance of specialized pilot training, including mountain ratings and thorough pre-flight preparations, to ensure safe operations in these challenging environments. The study concludes with a case study that illustrates practical applications of the discussed safety measures, reinforcing the necessity of comprehensive preparation and advanced technology in mitigating risks in mountainous aviation.
Korlátozottan hozzáférhető
Plasma Kinetics Revolutionizing the Storage of Hydrogen in Aviation
Shahrear, Mohammad Fahim; József , Menyhárt; DE--Műszaki Kar
The study of the thesis starts with the emissions of green-house gases by the aviation industry and goals to reduce it by 2050. The fuel tanks of modern planes are discussed in order to find suitable position to place our hydrogen tanks. the research then proceeds to discuss different storage techniques of hydrogen. A briefly study is done how conventional hydrogen gas is produced and how to produce hydrogen in carbon neutral way. The main research develops towards comparing three critical hydrogen storage techniques where the comparisons between compressed, cryogenic and solid state hydrogen storage is done. Then the author main idea of using Plasma kinetics storage system of capturing and releasing purest hydrogen is done and the main advantages of the system is done. the low cost infrastructure model of using Plasma Kinetics model is then discussed. At the end of thesis, the challenges, future research and reducing the production cost od Plasma Kinetics hydrogen model is discussed for aviation.

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