Theses (Department of Vehicles Engineering)

Állandó link (URI) ehhez a gyűjteményhez

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

Theses collection of the Department of Vehicles Engineering. The collection was started in 2023.

At the University of Debrecen, in accordance with the 2022 amendment to the 2011 Higher Education Act, student theses are only accessible from devices connected to the University's Eduroam WiFi network or from a university IP address.

“The thesis or diploma work of a student who has successfully passed the final examination shall be stored in full in the academic system of the higher education institution, and a record shall be maintained thereof. The stored theses and diploma works – with the exception of parts classified as confidential in accordance with the relevant legislation – must be made accessible and searchable without restriction through the academic system.” Further info on the National Higher Education Act in Hungarian: Felsőokt. tv. (új) - 2011. évi CCIV. törvény a nemzeti felsőoktatásról - Hatályos Jogszabályok Gyűjteménye.

Böngészés

Megjelenítve 1 - 20 (Összesen 45)

Korlátozottan hozzáférhető
Crashworthiness in The Safety of Small Aircraft
Saleh, Mahmoud Gamal Khalil Esmail; Kertész, József; DE--Műszaki Kar
This thesis investigates crashworthiness in small aircraft, identifying significant gaps in safety standards compared to commercial aviation. Due to their lightweight design and limited cabin space, small planes are highly vulnerable during crashes. Experimental tests compared traditional aluminum alloys with advanced composites like carbon fiber and aramid, demonstrating superior impact absorption and cabin protection from the latter. Structural reinforcements such as crushable zones and reinforced fuselages improved survivability. Additionally, energy-absorbing seats combined with advanced restraint systems significantly reduced forces on occupants. Based on these findings, the study recommends adopting composites, structural reinforcements, and enhanced seating systems as standard in small aircraft design, along with updates to crashworthiness regulations.
Korlátozottan hozzáférhető
Analysis of TECNAM P2006t Variable Pitch Propeller System
Uzdil, Mehmet Kaan; Zsolt, Tiba; DE--Műszaki Kar
Comprehensive analysis of Tecnam P06T types propeller system. Explanation of how variable pitch system work and areas of use. Comparing the system with other propulsion systems in the industry. Manufacturing, testing and maintenance proccesses of the system
Korlátozottan hozzáférhető
Application of Crew Resource Management in Commercial Aviation
Mülayım, Tuana; Geza, Husi; DE--Műszaki Kar
This work aimed to deeply analyze the application of Crew Resource Management. It intends to support the development of CRM via covering crew resource management as broadly and comprehensively as possible, including research, information, and reflections on all aspects of crew resource management; in doing so, it aims to examine this subject more comprehensively and in greater detail than it is currently addressed, as well as to provide resources for future studies.With the information, facts, research, analyses, and opinions in this work, it is intended to give a visionary aspect.This thesis analyzes the application of CRM in commercial aviation while exploring the role of it in enhancing aviation safety, assesses its background and its position in commercial aviation.
Korlátozottan hozzáférhető
Augmented Reality and Artificial Intelligence in the field of Aviation
Mendygaliyev, Nurlan; Erdei, Timotei; DE--Műszaki Kar
This thesis focuses on the implementation of artificial intelligence and augmented reality in the field of aviation, focusing on human fatigue detection systems. An overview of existing appliances in various spheres, including aviation, is given and analyzed. A basic human fatigue detection system based on real-time object detection was developed. However, it lacks accuracy due to one-step detection procedure, which is crucial in aviation, where high standards of safety are vital. Overall, there are promising opportunities for such technologies to enhance aviation safety, and therefore they should be applied first in flight simulators for testing.
Korlátozottan hozzáférhető
Human Factors and Analysis of Aviation Education Content of Commercial Pilots
Sana, Muhammad Raheel; Geza, Husi; DE--Műszaki Kar
An analysis about the importance of human factors in aviation, how they correlate to safety culture and how their incorporation in training program could lead to better performing and well versed pilots.
Korlátozottan hozzáférhető
Investigation of Noise Reduction Techniques in Aircraft Engines
Manono, Allan Nyaanga; Husi, Geza; DE--Műszaki Kar
This thesis studies noise reduction techniques for aircraft engines, particularly emphasizing the high-bypass turbofan engines. Aiming to be in line with international efforts to address environmental problems, this study focuses on the persistent issue of aircraft noise pollution in communities that are surrounded by airports. Technology evaluation is systematically performed through a thorough literature review and sound pressure level measurements. The scientific research found that the high bypass ratio (HBP) engines were effective in decreasing noise due to the great airflow mixing and less exhaust velocities. Technological breakthroughs consisting of chevrons, offset nozzles, swept and leaned stators, FFDs and so on are deeply studied. The methods of Chevrons and FFDs were shown to have an immediate impact on the level of noise, with potential reduction of up to 3 effective perceived noise decibels (EPNdB). The research finds that although each technology has its own advantages, the use of the combination of these methods can probably be the most effective approach to reduce airplane engine noise. This integrated approach would be part of meeting tighter regulations on noise and improving the quality of life of adjacent airport communities without compromising engine performance and economy. More studies are suggested to achieve the best settings of these technologies under different engine types and operation conditions
Korlátozottan hozzáférhető
Maintenance of Aircraft
Khan, Mohammed Imroz; Menyhárt , József; DE--Műszaki Kar
Something like aircraft is the heart of air travel, and Flight Maintenance is an arm of aviation safety and operational reliability at cost. With the continuous growth and modernization of the aviation industry, the need for high-quality, ontime, and regulatory-compliant maintenance service has only increased. Thanks to its skilled labor, EASA conformity and relatively low operational costs, Hungary has turned into an up-and-coming Maintenance, Repair and Overhaul (MRO) centre in Central Europe. A Thesis of Aircraft Maintenance in Hungary: Tourism, tourism centres and initiatives, business impact It is especially focused on major MROplayers Aeroplex of Central Europe and Lufthansa Technik Budapest and on the influence of low-cost carriers e.g. Wizz Air on maintenance policy. Using a mixedmethods approach based on the analysis of secondary data, a review of regulatory policies, and simulation-based evaluation, the study identifies supply- side constraints including challenges related to workforce shortages, regulatory burden, and the availability of training programs. The study also looks into prospects related to technology progress, predictive maintenance systems, and global collaboration. The results indicate that although Hungary has the basic ingredients of a competitive aircraft maintenance, repair, and overhaul (MRO) sector, strategicinvestment in training, hardware, and policy support will be needed for this sustainable growth to materialize. Final observations are presented in the form of practical recommendations, which strive to increase the purpose of the country for the needs of the European and global systems of air maintenance
Korlátozottan hozzáférhető
Human factors of pilots in aviation safety
Hossam Anwer Hassan Dagher, Saher; Menyhart , Joszef; DE--Műszaki Kar
Human factors in commercial aviation have become ever more significant over time. It is widely acknowledged that pilots' human factors, not technical issues, are typically at the root of aviation incidents and mishaps. Realizing this need has underscored the significance of creating a specific field of study focused on understanding human potential and constraints so as to design human- machine systems that prioritize efficiency and safety. This knowledge base's primary purpose is to assess and improve the efficiency and safety of aviation operations.
Korlátozottan hozzáférhető
AVIATION SAFETY, IN THE PAST, PRESENT AND FUTURE
ALZUBAIDI, SARAJ; MENYHART, JOZSEF; DE--Műszaki Kar
This thesis explores the evolution of aviation safety from historical foundations to modern and future challenges, emphasizing human factors, technical innovations, and regulatory frameworks. A significant portion focuses on pilot behavior, risk perception, and decision-making, using both historical accident data and theoretical models. I conducted an original student-led survey targeting pilot trainees at PHARMAFLIGHT, analyzing how current flight organizations manage workplace risk and safety procedures. The research identifies a gap between perceived and actual risks among pilots and highlights the critical role of training and corporate culture in influencing pilot decisions. Through scenario-based analysis, I evaluated how pilots respond to conflicting safety, economic, and productivity pressures during high-stakes flight situations. The work concludes by proposing enhanced risk mitigation strategies, combining structural aircraft design, safety-centered training, and system-based decision support tools, reflecting my direct contribution to understanding and improving aviation safety from a student pilot's perspective.
Korlátozottan hozzáférhető
Enhancing Safety Measures in Aviation: Challenges, Innovations, and Future Directions
Singh, Mahinder; Menyhárt, József Dr.; DE--Műszaki Kar
The thesis investigates the critical importance of aviation safety and explores historical, current, and emerging challenges in the field. It identifies human factors, regulatory complexity, and technological limitations as persistent threats to safe aviation operations.Safety culture, organizational behavior, and proactive safety management systems are emphasized as vital pillars for mitigating risks.The study highlights the role of international regulatory bodies like ICAO, FAA, and EASA in shaping safety standards and compliance frameworks.Technological advancements such as AI, automation, and predictive analytics are discussed as game changers in modern safety practices.The thesis includes case studies showcasing global best practices and lessons learned from successful safety initiatives.Training and human factors are analyzed as core components in reducing errors and fostering a resilient safety culture. Methodologically, the research uses both quantitative and qualitative approaches to analyze safety data and stakeholder perspectives.Based on findings, the thesis provides actionable recommendations for industry stakeholders to enhance safety performance.It concludes by advocating for a future-focused, collaborative approach to safety that embraces innovation, regulation, and continuous improvement.
Korlátozottan hozzáférhető
Comparative analysis of aircraft wing profiles
Badrakh, Oyunzaya; Telepoczki, Zoltan; DE--Műszaki Kar
The thesis “Comparative Analysis of Aircraft Wing Profiles” explores how different airfoil shapes affect lift and airflow using 2D simulations in MATLAB’s CFDTool. It focuses on the NACA 2412 airfoil tested at various angles of attack to study aerodynamic behavior and stall. The research is grounded in aerodynamic theory, including Bernoulli’s principle and wing geometry. Results showed varying lift performance among profiles and highlighted the limits of simplified simulations. Despite using basic tools, the study offers useful insights for future aerodynamic design and analysis.
Korlátozottan hozzáférhető
Improving Training in Aviation Education System
Agarwal, Aditya; ERDEI, Timotei István; DE--Műszaki Kar
This thesis studies the use of more advance technologies specifically focusing Virtual Reality (VR), Augmented Reality (AR), and Full Flight Simulators (FFS) to improve the effectiveness of the aviation education systems. Inconsistent training standards, skyrocketing costs and the need for resilience in sectoral processes, especially after the COVID-19 pandemic, presents a challenge for global air transport system
Korlátozottan hozzáférhető
Maintenance of Aircrafts: Using Technology Based Solutions, Artificial Intelligence & Blockchain Technology
Kotoor, Nikhil; József, Menyhárt; DE--Műszaki Kar
This thesis seeks to critically examine how combining artificial intelligence (AI), and blockchain technology into the aircraft maintenance will revolutionize safety, efficiency, and reliability in the aviation sector.
Korlátozottan hozzáférhető
Pathways to Sustainable Aviation: Strategies and Comprehensive Analysis
Bas, Muhammed Safa; Kocsis, Dénes László; DE--Műszaki Kar
This thesis explores various strategies for achieving sustainable aviation in response to growing environmental concerns and the aviation industry's contribution to global CO₂ emissions. It evaluates alternative fuels, including biofuels, synthetic fuels, and hydrogen, highlighting their potential and limitations. The study also examines emerging technologies such as electric and hybrid aircraft, as well as unconventional designs like blended wing bodies and bio-inspired structures. In addition to technological innovations, the research emphasizes the importance of operational improvements and the integration of other transport systems, such as high-speed rail, to reduce aviation's environmental impact. The findings suggest that no single solution is sufficient; instead, a combination of approaches is necessary. Collaboration among governments, industry, and researchers is essential to realize a more sustainable and efficient future for air travel.
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
Plasma-Induced Vortex Generation For Boundary Layer Control In Short Takeoff Aircraft
Razzaque, Abdul; Abdullah, Masuk; DE--Műszaki Kar
The 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.
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
Simplified Approach to Harnessing Residual Exhaust Heat from Airplane Engines for Electricity Generation
Chandran, Aswin; Abdullah, Masuk; DE--Műszaki Kar
The 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.
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.

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