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Recent Submissions

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...
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...
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...
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-...
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...
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...
Investigation of failure mechanisms in dual-phase steels through cohesive zone modeling and crystal plasticity frameworks Aydiner, Ilbilge Umay; Tatlı, Berkehan; Yalçinkaya, Tuncay (2024-03-01) Dual-phase (DP) steels are characterized by their good formability and interesting material properties, which primarily originate from their unique composition, combining the ductile ferrite phase with the hard martensite ...
Comparison of Linear and Nonlinear Twist Extrusion Processes with Crystal Plasticity Finite Element Analysis Şimşek, Ülke; Davut, Kemal; Miyamoto, Hiroyuki; Yalçınkaya, Tuncay (2024-03-01) The mechanical characteristics of polycrystalline metallic materials are influenced significantly by various microstructural parameters, one of which is the grain size. Specifically, the strength and the toughness of polyc...
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...
Phase field modeling of fatigue crack growth retardation under single cycle overloads Waseem, Sarim; Erdoğan, Can; Yalçınkaya, Tuncay (2024-02-01) A zone-based crack retardation model that responds to single cycle overloads is applied to a phase field fatigue framework. Fatigue crack growth is incorporated through the degradation of fracture toughness in the phase fi...
High-fidelity simulations of low-velocity impact induced matrix cracking and dynamic delamination progression in CFRP beams Batmaz, Onur Ali; Bozkurt, Mirac Onur; Gürses, Ercan; Çöker, Demirkan (2024-02-01) A high-fidelity finite element model is constructed to simulate the low-velocity line-impact experiments conducted by Bozkurt and Coker on [05/903]s CFRP beams. The simulations utilize a user-implemented three-dimensional ...
High-speed observation of dynamic delamination failure in tapered composite laminates under tensile loading Bozkurt, Mirac Onur; ÖZEN, EMİNE BURÇİN; Yavuz, Burak Ogun; Parnas, Kemal Levend; Çöker, Demirkan (2024-01-01) This article presents high-fidelity observations of the time evolution of unstable delamination growth in tapered composite beams under tensile loading via ultra-high-speed camera in conjunction with digital image correlat...
Adjoint based aerodynamic shape optimization of a semi-submerged inlet duct and upstream inlet surface Küçük, Umut Can; Tuncer, İsmail Hakkı (2024-01-01) Aerodynamic performance of a semi-submerged inlet exposed to a significant amount of boundary layer ingestion is optimized using the open-source flow and adjoint solver SU2. Pressure recovery is taken as the objective func...
Distributed Robust Formation Control of Heterogeneous Multi-UAVs with Disturbance Rejection Imran, Imil Hamda; Kurtuluş, Dilek Funda; Memon, Azhar M.; Goli, Srikanth; Kouser, Taiba; Alhems, Luai Muhammad (2024-01-01) This paper investigates the formation control of multiple heterogeneous quadrotor unmanned aerial vehicles (UAVs). The research focuses on developing a distributed robust formation control strategy to effectively manage th...
Computationally Efficient Attitude Estimation for Small Satellites Using Integrated Measurements Benli, Dogukan; Söken, Halil Ersin (2024-01-01) Every year, computer processors are becoming more powerful and efficient. This progress allows for using less power for computing or more complex models for embedded systems, especially in aerospace. Nevertheless, computat...
Unsteady aerodynamics over NACA0005 airfoil for ultra-low Reynolds numbers Kouser, Taiba; Kurtuluş, Dilek Funda; Aliyu, Abdulrahman; Goli, Srikanth; Alhems, Luai M.; IMRAN, Imil Hamda; Memon, Azhar (2024-01-01) Numerical simulation for a two-dimensional NACA0005 is performed for angle of attack α = 0° − 15° in present study. The Reynolds numbers 1000, 2000 and 5000 are considered. Simulations show that...
Designing restorative landscapes for students: A Kansei engineering approach enhanced by VR and EEG technologies Karaca, Elif; Çakar, Tuna; Karaca, Mehmet; Hüseyin Miraç Gül, Hasan (2024-01-01) This study explores the alignment of specific landscape features within school environments with the core elements of Attention Restoration Theory (ART) that includes Coherence, Fascination, Compatibility, and Being Away. ...
Three-dimensional flow evaluation of monarch butterfly wing Comez, Fadile Yudum; Sengil, Nevsan; Kurtuluş, Dilek Funda (2024-01-01) The current study aims to examine the flow field around a monarch butterfly wing at different angles of attack. A fully opened forewing configuration for the monarch butterfly wing has been selected for analysis at a maxim...
Enhancing Aircraft Safety through Advanced Engine Health Monitoring with Long Short-Term Memory Yıldırım, Süleyman; Rana, Zeeshan A. (2024-01-01) Predictive maintenance holds a crucial role in various industries such as the automotive, aviation and factory automation industries when it comes to expensive engine upkeep. Predicting engine maintenance intervals is vita...
Experimental study on efficient propulsion system for multicopter UAV design applications Goli, Srikanth; Kurtuluş, Dilek Funda; Alhems, Luai M.; Memon, Azhar M.; Imran, Imil Hamda (2023-12-01) The usage of multicopter unmanned aerial vehicles (UAVs) has increased for various military and civilian purposes. The choice of propulsion system of such a vehicle is crucial to fulfill the intended mission requirements. ...

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