Department of Aerospace Engineering, Thesis

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Thesis (631)

Has File(s)
Yes (606)
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Author
Abdulrahim, Anas (2)
Avcıoğlu, Sevil (2)
Ayan, Erdem (2)
Baş, Onur (2)
Cengiz, Kenan (2)

Subject
Aerospace engineering. (59)
Airplanes (48)
Aerodynamics. (42)
Aeronautics. (40)
Computational fluid dynamics. (37)

Date Issued
1987 - 1989 (9)
1990 - 1999 (75)
2000 - 2009 (156)
2010 - 2019 (341)
2020 - 2022 (50)

Item Type
Master Thesis (567)
Ph.D. Thesis (64)

Recent Submissions

EFFECTS OF INFLOW BOUNDARY LAYER ON THE WAKE CHARACTERISTICS OF A RADIALLY NON-UNIFORM POROUS DISC Abdulrahim, Anas; Uzol, Oğuz; Perçin, Mustafa; Department of Aerospace Engineering (2022-1-03) This thesis study presents the results of an experimental investigation focusing on the effects of inflow boundary layer on the wake characteristics of a porous disc (disc diameter-to-boundary layer height is 0.2) with rad...
DEVELOPMENT OF AN INDOOR REACTIVE NAVIGATION METHOD USING SPHERICAL IMAGES Şahin, Yiğit; Koku, Ahmet Buğra; Department of Aerospace Engineering (2021-12-29) An algorithm for visual topological localization and navigation is proposed. Landmark detection and tracking is performed in successive frames to determine angular changes between repetitive and salient features. This angu...
Experimental and analytical investigation of the size effect on the strength of open hole composite laminates Gezer, Ali; Çöker, Demirkan; Department of Aerospace Engineering (2021-12-10) In this thesis, we investigate the effect of size on the strength of open hole composite laminates using experimental and analytical approaches. The size effect consists of the effect of thickness and hole size while keepi...
ADJOINT-BASED AERODYNAMIC SHAPE OPTIMIZATION OF A STRAKE-DELTA WING CONFIGURATION Yutük, Kaan; Tuncer, İsmail Hakkı; Department of Aerospace Engineering (2021-11-8) Modern fighter aircraft compulsorily demand high maneuverability capability, which is mainly provided by an improved aerodynamic performance at high angles of attack. This is achieved by mostly employing strakes and canard...
DELAYED DETACHED-EDDY SIMULATION BASED PREDICTIONS OF BOUNDARY LAYER TRANSITION AND CAVITY FLOW NOISE Yalçın, Özgür; Özyörük, Yusuf; Department of Aerospace Engineering (2021-11-1) This dissertation investigates the boundary layer transition as well as the cavity flow noise prediction capabilities of a high-order in-house solver using various Delayed Detached-Eddy Simulation (DDES) frameworks. Before...
An experimental and numerical investigation of spray atomization in liquid-propellant rocket engines Gülmez, Senem; Kahveci, Harika Senem; Department of Aerospace Engineering (2021-9-10) Since the liquid rocket engines have been widely used in various flight applications, improving the efficiency and stability of those engines have become important. To achieve efficient combustion in the chamber, the injec...
Static and dynamic aeroelastic analysis of a very light Aircraft Demirer, Halime Gül; Kayran, Altan; Department of Aerospace Engineering (2021-9-10) Aircraft design processes need to ensure that the aircraft is aeroelastically stable within its operational envelope. This thesis presents an overview of the static aeroelastic, flutter and gust response analysis of a very...
Numerical prediction of aerodynamic stability derivatives of a projectile Yayla, Koray; Özyörük, Yusuf; Department of Aerospace Engineering (2021-9-07) Prediction of aircraft aerodynamic stability derivatives is crucial for evaluating its flight dynamic characteristics. By using the open source SU2 software, steady and unsteady Reynolds-Averaged Navier-Stokes analyzes are...
Development of a design method for subsonic intakes with improved aerodynamic performance and reduced radar signature Ünlü, Tezcan; Eyi, Sinan; Department of Aerospace Engineering (2021-9-2) In this thesis, a design method for a subsonic intake with high aerodynamic performance and reduced radar signature is developed. Intakes are key components of aircrafts’ propulsion systems that create open ended cavities ...
FOREBODY OPTIMIZATION OF A JET TRAINER AIRCRAFT USING RESPONSE SURFACE METHODOLOGY WITH GENETIC ALGORITHM Kandemir , Ömer; Tuncer, İsmail Hakkı; Department of Aerospace Engineering (2021-9-1) The aerodynamic design of an aircraft's forebody geometry has a significant impact on its performance and stability. Although most studies on aircraft performance have focused on optimizing wing-like structures, the cont...
Experimental investigation of failure mechanism in cross-ply and fabric curved composite laminates Çevik, Ahmet; Çöker, Demirkan; Department of Aerospace Engineering (2021-8) Laminated curved-shape composite parts which are used in the spar and ribs in aircraft and wind turbine blades are subjected to high interlaminar tensile and shear stresses. These stresses cause delamination and subsequent...
A Study to Evaluate Scales in Some Turbulent Flows in View of Quantic Behavior of Turbulence Using Experimental Results Bekoğlu, Elif; Çelenligil, Mehmet Cevdet; Çıray, Cahit; Department of Aerospace Engineering (2021-8) The knowledge of the energy contents, sizes, and lifetimes of eddies is necessary to understand the structure of turbulent flows. The spectral approach can provide the frequency-dependent energy spectrum, which helps to fi...
Experimental and numerical investigation of fretting failure in lug-bush members under cyclic loading Özen, Emine Burçin; Çöker, Demirkan; Department of Aerospace Engineering (2021-7) In this study, experimental and numerical work to investigate the mechanisms occurring at the contact region of the lug-bush members under cyclic loading are presented. Post-mortem macroscopic and microscopic investigation...
Attitude and Orbit Control of a Solar Sail Spacecraft for Responsive Operational Concept Polat, Halis Can; Tekinalp, Ozan; Department of Aerospace Engineering (2021-6-15) Utilization of the propellant-free thrust capability of Solar Sail Spacecraft (SSS) is addressed. For this purpose, an elliptical orbit with a very low perigee altitude and an apogee altitude high enough to have solar sail...
ESTIMATION OF AERODYNAMIC LOADS OF A PROPELLER THROUGH IMPROVED BLADE ELEMENT AND MOMENTUM THEORY AND PROPELLER DESIGN OPTIMIZATION KAYA, DERYA; Kutay, Ali Türker; Department of Aerospace Engineering (2021-6) This study focuses on accurate prediction of total forces and moments acting on a propeller in all flight conditions through Blade Element and Momentum Theory (BEMT) and design optimization of a UAV propeller. Under vario...
Adjoint Based Aerodynamic Shape Optimization of Subsonic Submerged Intake AHMED, ALI; Tuncer, İsmail Hakkı; Department of Aerospace Engineering (2021-5-04) In this study the aerodynamic shape optimization of subsonic submerged intake is performed. The total pressure at the aerodynamic interface plane and lift are employed as objective functions. Drag is constrained and emp...
Full Envelope Nonlinear Controller Design for a Novel Electric VTOL(eVTOL) Air-taxi via INDI Approach Combined with CA Suiçmez, Emre Can; Kutay, Ali Türker; Department of Aerospace Engineering (2021-5) On-demand urban air mobility (UAM) has become very popular in recent years with the introduction of the electric vertical take-off and landing (eVTOL) aircraft concept. Thanks to the key advantages of electric propulsion (...
Buffet investigation on airfoils Algül, Kezban Gizem; Özgen, Serkan; Department of Aerospace Engineering (2021-4) The aim of the present thesis is to investigate buffet onset characteristics in two-dimensional flow. NACA0012 airfoil was chosen as the geometry in this study since the profile is frequently used for the lifting surfaces ...
Aerodynamic shape optimization of a wing using 3d flow solutions with su2 and response surface methodology Yıldırım, Berkay Yasin; Tuncer, İsmail Hakkı; Department of Aerospace Engineering (2021-4) In this study, the aerodynamic shape optimization of a wing is performed by using 3D flow solutions together with response surface methodology. The purpose of this study is to optimize the aerodynamic shape of a wing to ac...
Kill analysis tool for missiles equipped with proximity fuzes Öztürk, Ece; Kutay, Ali Türker; Department of Aerospace Engineering (2021-3-18) In this thesis study, a developed kill analysis tool for the missiles having proximity fuzes is presented. Some of today’s missiles have proximity fuze, and this type of missiles’ warhead can be detonated not when the miss...

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