Department of Aerospace Engineering, Article

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Recent Submissions

Post heat treatment optimization of cold spray additive manufactured Inconel 718 Karakas, Aptullah; Ataee, Arash; Rathi, Amit; Fenercioglu, Tevfik Ozan; Erdoğan, Can; Yalçınkaya, Tuncay (2025-12-01) The cold spray technique has recently emerged as an additive manufacturing method for producing free-standing parts, in addition to its use in repair and coating applications. Manufacturing relatively hard alloys such as I...
Investigation of Variable Taper Angle Design in Highly Tapered Laminates for Delaying Delamination Ergin, Fırat; Kayran, Altan (2025-03-01) Specific requirements in aircraft components may necessitate the use of high taper angles in the thickness transition region of composite laminates, leading to early delamination initiation at the thin side of the taper re...
A Data-Driven Approach for the Prediction of Reynolds Number Effects on Wind Turbine Airfoil Aerodynamic Polars Özgören, Ahmet Can; Uzol, Oğuz (2025-03-01) This study presents a data-driven approach to extrapolate and predict Reynolds number effects on wind turbine airfoil polars. For this purpose, a database is created using experimentally obtained aerodynamic coefficients f...
Comparative Aerodynamic Analysis and Parallel Performance of 2D CFD Simulations of a VAWT Using Sliding Mesh Interface Method Önel, Hüseyin Can; Adam, Ali Ata; Sezer Uzol, Nilay (2025-02-01) With rapid advancements in computer hardware and numerical modeling methods, Computational Fluid Dynamics (CFD) has gained prominence in simulating complex flows. As parallel computation becomes an industry standard, the c...
Artificial neural network for the evaluation of electric propulsion system in unmanned aerial vehicles Goli, Srikanth; Kurtuluş, Dilek Funda; Waqar, Muhammad; Imran, Imil Hamda; Alhems, Luai M.; Kouser, Taiba; Memon, Azhar M. (2025-01-01) In the domain of unmanned aerial vehicles (UAVs), evaluating electric propulsion systems is pivotal for enhancing performance and efficiency. This study employs a scaled conjugate gradient (SCG) algorithm to train an artif...
Surrogate model based optimization of variable stiffness composite wingbox for improved buckling load with manufacturing and failure constraints Inci, Hasan; Kayran, Altan (2025-01-01) The buckling load of a wingbox is maximized by applying different automatic fiber placement (AFP) strategies on the skins of the wing having NACA 4412 airfoil profile. Specifically, the effect of single, dual and three reg...
Modeling of the Stress Path-Dependent Strain Ratcheting Behaviour of 304L Stainless Steel Through Crystal Plasticity Frameworks Açar, Sadık Sefa; Yalçınkaya, Tuncay (2025-01-01) This study investigates the strain ratcheting behavior of 304L stainless steel under complex stress-controlled cyclic loading conditions employing crystal plasticity models in the DAMASK framework. Strain ratcheting, a phe...
Design optimization of a fluidic thrust vectoring system based on coanda effect using meta-models Kara, Emre; Kurtuluş, Dilek Funda (2024-12-30) In this study, parametric optimization is employed to identify optimal output parameters for physical components of HOMER nozzle type fluidic thrust vectoring (FTV) system. Optimization study is conducted on seven output p...
Design Optimization of a Novel Flush Boundary Layer Diverter Kucuk, Umut Can; Tuncer, İsmail Hakkı (2024-12-01) A novel boundary layer diverter is designed and optimized for increasing the performance of a typical semi-submerged inlet ingesting large amounts of boundary layer flow. A conceptual diverter configuration based on the pr...
Relative position estimation using modulated magnetic field for close proximity formation flight Shibata, Takuma; Söken, Halil Ersin; Sakai, Shin-ichiro (2024-12-01) This paper presents a method to estimate relative position vectors between spacecraft equipped with magnetic coils and magnetic field sensors for close proximity operation. Filters can segregate a magnetic field with a par...
The oscillating vortex generator: a boundary layer propulsion and flow control device Anılır, Berkan; Kurtuluş, Dilek Funda; Platzer, M. F. (2024-11-29) This paper aims to explore the feasibility of providing boundary layer propulsion and flow control by means of embedded aerofoils that are oscillating in the pure plunge mode. To this end, Navier-Stokes calculations of the...
Numerical and experimental investigations of swirl-stabilized partially premixed flames using natural gas-hydrogen-air mixtures Böncü, Emre; Güleryüz, Dilay; Karaca, Mehmet; Allouis, Christophe Gerard; Gökalp, İskender (2024-10-01) This study uses experimental and numerical techniques to examine natural gas and hydrogen mixtures as fuel with a partially premixed swirl-stabilized burner. Variations in the fuel mixture composition were investigated thr...
Three-dimensional flows in the wake of a non-cavitating and cavitating marine propeller Başkan Perçin, Özge; Fiscaletti, Daniele; Elsinga, Gerrit E.; Van Terwisga, Tom (2024-09-01) Tip-vortex cavitation is among the first forms of cavitation to appear around ship propellers. In the present study, the time-resolved three-dimensional flow field around non-cavitating and cavitating tip vortices in the w...
Bioinspired soft-hard interfaces fabricated by multi-material additive manufacturing: A fracture mechanics investigation using essential work of fracture ALTUNTAŞ, UMUT; Çöker, Demirkan; Yavas, Denizhan (2024-08-01) This study employs the Essential Work of Fracture (EWF) concept to evaluate the interfacial fracture toughness of bioinspired interfaces between soft and hard polymer phases. The experimental framework utilizes a model mat...
A Comparative Study on the Efficiencies of Aerodynamic Reduced Order Models of Rigid and Aeroelastic Sweptback Wings Özkaya Yılmaz, Özge; Kayran, Altan (2024-08-01) This paper presents the effect of wing elasticity on the efficiency of a nonintrusive reduced order model using a three-dimensional sweptback wing. For this purpose, a computationally low-cost but highly accurate nonintrus...
Experimental investigation of momentum ratio and impingement angle effects on spray characteristics of triplet and pentad injectors Gulmez, Senem; Kahveci, Harika Senem (2024-07-01) A comprehensive experimental investigation is conducted to analyze the effects of momentum ratio and impingement angle on impinging spray characteristics of triplet and pentad injectors by using Phase Doppler Anemometry (P...
Effect of flame characteristics on an isolated ethanol droplet evaporating through stagnation methane/air flames: An experimental and numerical study Kaya Eyice, Deniz; Karaca, Mehmet; Halter, Fabien; Gökalp, İskender; Chauveau, Christian (2024-07-01) A single ethanol droplet evaporation through laminar methane/air stagnation flame is investigated at lean, stoichiometric and rich conditions experimentally and numerically. For the droplets having initial diameters of 20-...
A non-iterative boundary element formulation for nonlinear viscoelasticity Akay, Ahmet Arda; Gürses, Ercan; Göktepe, Serdar (2024-06-01) In this study, we propose a non-iterative boundary element method (BEM) of highly nonlinear viscoelasticity in time domain. The computationally attractive iteration-free algorithmic structure is achieved by the linearizati...
FARKLI KİMYASAL YÜZEY İYİLEŞTİRME İŞLEMLERİNİN PİRİNÇ KABUĞU EPOKSİ KOMPOZİT MALZEMELERİN MEKANİK ÖZELLİKLERİNE ETKİSİ Demirtaş, Mehmet Selim; Avcıoğlu, Emir; Güloğlu, Görkem Eğemen (2024-06-01) Bazı tarım ürünlerinin atık kısımlarında bulunan lifli yapılar, polimer matrisli kompozit malzemeler içerisinde takviye veya dolgu malzemesi olarak kullanılmaktadırlar. Pirinç kabuğu da bu yapıdaki tarımsal atıklarına örne...
High Aspect Ratio Composite Wings: Geometrically Nonlinear Aeroelasticity, Multi-Disciplinary Design Optimization, Manufacturing, and Experimental Testing Farsadi, Touraj; Ahmadi, Majid; Şahin, Melin; Haddad Khodaparast, Hamed; Kayran, Altan; Friswell, Michael I. (2024-03-01) In the field of aerospace engineering, the design and manufacturing of high aspect ratio composite wings has become a focal point of innovation and efficiency. These long, slender wings, constructed with advanced materials...

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