Hallgatói dolgozatok (MK)
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A Műszaki Karon készült szakdolgozatok, diplomamunkák és TDK dolgozatok gyűjteménye.
A Debreceni Egyetemen a hallgatói dolgozatok a 2011-es felsőoktatási törvény 2022. évi törvénymódosításához alkalmazkodva csak az Egyetem által szolgáltatott Eduroam WiFi hálózatra csatlakoztatott eszközről, vagy egyetemi IP címről érhetőek el.
Jelen gyűjteményben a dolgozatok egy része az Egyetem döntése értelmében csak könyvtári számítógépekről hozzáférhetőek. További információ: DEA pontok.
Böngészés
Hallgatói dolgozatok (MK) Szerző szerinti böngészés "Abdullah, Masuk"
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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 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 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 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 Safety Effectiveness in Commercial Aviation: PLS-SEM Analysis of the Impacts of HRM PracticesAbdullah, Masuk; T. Kiss, Judit Gabriella; Husi, Géza; DE--Műszaki KarEnsuring the safety of commercial aviation depends on effective HRM (Human Resource Management) practices. This study explores this critical relationship with particular reference to the aviation industry in Bangladesh. The study uses Partial Least Squares Structural Equation Modeling (PLS-SEM) to look at survey data from Bangladeshi aviation organizations in order to find out how HRM affects the results of safety effectiveness measures. The study draws attention to the importance of strategic decision-making within the HR department, making HRM the cornerstone of aviation safety. They recognize the challenges inherent in the aviation industry, where human error can have catastrophic consequences. The manuscript emphasizes the role of HRM in creating a safety-conscious culture. Recent research indicates that appropriate training and upkeep have a favorable effect on minimizing safety hazards. This investigation delves into the impact of HRM practices on safety performance, with a focus on recruitment, training, job agreements, and career advancement opportunities. The study underscores the significance of sustained career contentment among aviation experts, while its findings underscore how efficient HRM practices can aid in shaping the future, thereby leading to a more secure and proficient commercial aviation sector. Through an analysis of the specific correlation between HRM practices and safety performance, this research offers valuable insights for organizations in Bangladesh's commercial aviation industry, drawn from a survey-based questionnaire.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.