Theses (Department of Vehicles Engineering)
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Theses collection of the Faculty of Engineering.
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Megjelenítve 1 - 20 (Összesen 31)
Tétel Korlátozottan hozzáférhető Morphing Airfoil Design for Enhanced Aerodynamic PerformanceChaafi, Melek; Abdullah, Masuk; DE--Műszaki KarThis 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.Tétel Korlátozottan hozzáférhető Plasma-Induced Vortex Generation For Boundary Layer Control In Short Takeoff AircraftRazzaque, Abdul; Abdullah, Masuk; DE--Műszaki KarThe study investigates the use of dielectric barrier discharge (DBD) plasma actuators for boundary layer control on the NACA 23012 airfoil to enhance the aerodynamic performance of short take-off and landing (STOL) aircraft. STOL aircraft have specific operation requirements, including high lift, drag, and angle of attack (AoA) flow stability. Plasma actuators, which energize the boundary layer with electrohydrodynamic forces, are considered a lightweight, non-intrusive, and dynamically responsive flow control solution. The study uses computational simulations in MATLAB to investigate the baseline aerodynamic behavior of an NACA 23012 airfoil and examines how plasma actuators affect critical aerodynamic parameters. Results show that plasma actuators can improve aerodynamic efficiency and be applied for passive flow separation control without incurring weight penalties associated with traditional boundary layer control methods. Future research should focus on 3D modelling and experimental validation, along with energy efficiency optimization for their application in production scale.Tétel Korlátozottan hozzáférhető Impact of Hydraulic System Design on Aircraft Weight and Fuel EfficiencyYadav, Amrita; Abdullah, Masuk; DE--Műszaki KarHydraulic 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.Tétel Korlátozottan hozzáférhető Investigation into the use of Segmented Control Surfaces in AircraftsBawa, Asulada; Abdullah, Masuk; DE--Műszaki KarThis 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.Tétel Korlátozottan hozzáférhető Simplified Approach to Harnessing Residual Exhaust Heat from Airplane Engines for Electricity GenerationChandran, Aswin; Abdullah, Masuk; DE--Műszaki KarThe aviation sector, contributing to the global economic output, faces significant environmental pressure due to its 2-3% carbon emissions. To increase energy efficiency and sustainability, researchers have explored the use of thermoelectric generator systems (TEGs) to recover waste heat loss in airplane engine exhaust and convert it into electrical energy. The study found efficiencies range between 5% and 10%, with better performance with large temperature gradients. Materials like bismuth telluride show better efficiency, but higher power output may lead to fuel cuts of up to 5%. However, TEG systems face challenges such as weight and space constraints, thermals, and regulatory issues. Advanced materials could mitigate these challenges, and experimental validation with stakeholders is needed. This research lays the groundwork for further research and practical implementation of TEG systems as a transformative solution for sustainable aviation.Tétel Korlátozottan hozzáférhető Design of a partial cowling attached to a Propfan Engine to aid in noise reductionEkochu, Luke; Abdullah, Masuk; DE--Műszaki KarThe 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.Tétel Korlátozottan hozzáférhető Risk and safety management of artificial intelligence in aircraftMaidar , Anudari; Abdullah, Masuk; DE--Műszaki KarThe study explores the use of artificial intelligence (AI) in aviation risk and safety management, focusing on fuzzy dynamic systems. The aviation industry faces challenges due to uncertainties and data fuzziness, making traditional risk assessment methods challenging. The aim is to improve decision-making for aircraft safety, including environmental, pilot, and mechanical health. The main goal is to build an enhanced fuzzy inference system (FIS) with an 85% accuracy rate, utilizing MATLAB computational tools and modular programming. The system's reasoning is clarified through visualization techniques, making it interpretable for stakeholders. This thesis contributes to the growing literature on AI application in aviation, highlighting the potential of fuzzy dynamic systems in safety management.Tétel Korlátozottan hozzáférhető Mountainous Regions and Aviation Safety: Assessing Risks and MitigationTilekmatova, Tinatin; Géza, Husi; DE--Műszaki KarThis 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.Tétel Korlátozottan hozzáférhető CORRELATION BETWEEN HUMAN FACTORS AND AVIATION ACCIDENTS, AND MANUFACTURERS AND CIVIL AVIATION AUTHORITIES' ROLES IN MITIGATING THEMHossain Safkat, Mohaimanul; Geza, Husi; DE--Műszaki KarThis 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.Tétel Korlátozottan hozzáférhető Technical implications of Pareidolia as a Measure of Human Performance Factor in Aviation Pilot Training A case study on Debrecen University Professional Pilot StudentsYilmaz, Halil Eren; Husi, Géza; DE--Műszaki KarThis research aims to determine University, Hungary professional pilot student’s sensitivity and reactions toward pareidolia images as a measure of the Human Performance factor. The study comprised a total of 86 participants, consisting of 22 females and 64 males. All participants completed the pareidolia test, which consisted of three types of stimuli: face images, face pareidolia images, and scramble images. The significant association between stress levels due to flight training and participants' perception of emotion in the face images suggests that stress may influence the interpretation and recognition of facial expressions. The increase of stress levels experienced due to flight training and faculty courses may affect individuals' ability to accurately perceive and interpret emotional clues in facial expressions, potentially impacting their decision-making abilities in high-pressure aviation contexts.Tétel Korlátozottan hozzáférhető The Impact of human factors on flight safety, including accidents and incidents caused by pilot error, communication breakdown, and automation dependence.Boppani, Pruthvi; Husi, Géza; DE--Műszaki KarThe purpose of this thesis is to examine the impact of human factors on flight safety, with a focus on accidents and incidents caused by pilot error, communication breakdown, and automation dependence. The thesis aims to analyze the underlying causes of these factors, the challenges they present to the aviation industry, and the measures that can be taken to mitigate their effects. The study will draw on relevant literature, case studies, and expert opinions to provide a comprehensive analysis of the issue and offer recommendations for improving flight safety. By identifying the key human factors that contribute to aviation accidents and incidents, this thesis seeks to provide insights that can help aviation professionals develop better safety practices and protocols.Tétel Korlátozottan hozzáférhető POTENTIAL OF THERMOELECTRIC RECUPERATION IN AVIATIONDhupar, Adammy Pratap Singh; Husi, Géza; DE--Műszaki KarThis research aims to determine the introduction of advanced thermoelectric technology in the field of aviation energy in the context of increasing sustainability. It considers environmental problems of the aircraft and the potential contribution of thermoelectric systems. Statement of the problem results in research question, which has found the answer by investigating passenger prioritization and determining the possible benefits and limitations of thermoelectric use. The results demonstrate the perspective of possible greener aviation devotion the discussed concerns. Nevertheless, the technical and regulatory issues are to be resolved to implement the proposed solutions. Thus, the thesis offers a perspective of using the waste thermal energy for making aviation closer to sustainability.Tétel Korlátozottan hozzáférhető Future of Aviation-Hybrid and Electric AircraftRidwan, Roufun; Menyhárt, József; DE--Műszaki KarWith 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.Tétel Korlátozottan hozzáférhető A comparative analysis of Instrument Landing System and Ground-Based Augmentation System Landing System for aircraft landing guidanceAzjargal, Gombo-Ochir; Géza, Husi; DE--Műszaki KarAchieving 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.Tétel Korlátozottan hozzáférhető Plasma Kinetics Revolutionizing the Storage of Hydrogen in AviationShahrear, Mohammad Fahim; József , Menyhárt; DE--Műszaki KarThe 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.Tétel Korlátozottan hozzáférhető COVID 19 IN AVIATION - IMPACTS, COMPARATIVES AND SOLUTIONSGomes Pereira, Henrique; Husi, Géza; DE--Műszaki KarThe 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.Tétel Korlátozottan hozzáférhető From the First to the Future The Technical Development and Future Directions of Global Navigation Satellite Systems Its impact on Civil Aviation NavigationFilipovic, Aleksandar; Géza, Husi; DE--Műszaki KarThe 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.Tétel Korlátozottan hozzáférhető Dynamics of Subsonic Airflow and Integration of a Home Simulator SetupUygun, Alim; Erdei, Timothy István; DE--Műszaki KarI 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.Tétel Korlátozottan hozzáférhető The Rise of Hybrid Aircraft in Sustainable AviationAfify, Karim; Menyhárt, József; DE--Műszaki KarHybrid aircraft represent a significant innovation in aviation by combining conventional gas turbine engines with electric or hydrogen-based propulsion systems. These aircraft offer the potential to transform the aviation sector, significantly reducing environmental impact by lowering greenhouse gas emissions and noise pollution. Hybrid propulsion systems improve fuel efficiency and operational flexibility, making air travel more sustainable. The electric motors in hybrid aircraft produce no emissions during operation, while hydrogen-powered systems emit only water vapor, thus reducing the carbon footprint of aviation. Additionally, the quieter electric propulsion systems help mitigate noise pollution near airports and flight paths, benefiting surrounding communities. Energy efficiency is enhanced through the recovery and reuse of energy during descent and braking. However, the development of hybrid aircraft faces challenges, including the need for extensive research and development, as well as adjustments to infrastructure, regulations, and operational protocols. Despite these hurdles, hybrid aircraft offer a promising path toward greener aviation and reduced dependency on nonrenewable energy sources.Tétel Korlátozottan hozzáférhető The effect of multicultural and monocultural environments on Crew Resource Management education deliveryKlyshpayeva, Dana; Husi, Géza; DE--Műszaki KarThe thesis explores the impact of multicultural and monocultural environments on Crew Resource Management (CRM) education delivery. It traces the historical development of CRM, emphasizing the importance of non-technical skills in aviation. Through surveys and interviews with students from different cultural backgrounds, the research reveals that multicultural environments enhance communication, English fluency, and adaptability, while monocultural settings improve teamwork and conflict resolution. However, each environment presents specific challenges, such as social toxicity in monocultural settings and initial adaptation difficulties in multicultural ones. The findings suggest that CRM training programs need to be tailored to address these differences to optimize effectiveness and improve aviation safety. The study offers actionable recommendations for enhancing CRM education.