Department of Aerospace Engineering, Article

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Recent Submissions

The influence of flow forming on the precipitation characteristics of Al2024 alloys
Karakaş, Aptullah; Fenercioğlu, Tevfik Ozan; Yalçınkaya, Tuncay (2021-09-15)
© 2021 Elsevier B.V.Aluminum alloys are heat treated for better specific strength. In certain cases, an intermediate cold work is applied between solution heat treatment and aging. In this study, a specific tube forming te...
Improvement in the spring analogy mesh deformation method through the cell-center concept
Yang, Yosheph; Özgen, Serkan; Kim, Haedong (2021-08-01)
© 2021 Elsevier Masson SASThe mesh deformation method is an important topic in studies involving moving boundary problems. As one of the main approaches, this method has been applied in various related studies. To address ...
2D and 3D simulations of dynamic delamination in curved unidirectional CFRP laminates subjected to moment/axial combined loading
Ata, Tamer Tahir; Çöker, Demirkan (2021-07-15)
© 2021 Elsevier LtdDynamic failure of 30-ply curved unidirectional CFRP laminate under quasi-static moment/axial combined loading used in the experiments of Tasdemir (2018) is investigated numerically. 2D and 3D explicit f...
Investigation of a rotor blade with tip cooling subject to a nonuniform temperature profile
Kahveci, Harika Senem (2021-07-01)
© 2021 by ASME.One of the challenges in the design of a high-pressure turbine blade is that a considerable amount of cooling is required so that the blade can survive high temperature levels during engine operation. Anothe...
Effect of hydrogen jets in supersonic mixing using strut injection schemes
Jeyakumar, S.; Kandasamy, Jayaraman; Karaca, Mehmet; Karthik, K.; Sivakumar, R. (2021-06-28)
© 2021 Hydrogen Energy Publications LLCThe prevalence of complex phenomena associated with the fuel mixing of a supersonic stream in scramjet combustor is inherently occurred due to the short residence time. An efficient i...
Experimental investigation of tip anhedral effects on the aerodynamics of a model helicopter rotor in hover
Uluocak, Sinem; Perçin, Mustafa; Uzol, Oğuz (2021-06-01)
© 2021 Elsevier Masson SASThis study experimentally investigates the effects of tip anhedral on the rotor aerodynamic performance and the tip vortex characteristics in hovering flight. A five-bladed scaled helicopter rotor...
Long term and safe relative orbit design for heterogeneous spacecraft clusters
Yaglioglu, Burak; Tekinalp, Ozan (2021-06-01)
© 2020 COSPARThe problem of obtaining long term relative orbit configurations for spacecraft clusters with realistic operational considerations such as safety, station keeping and inter-spacecraft distances is addressed. T...
A crystal plasticity based finite element framework for RVE calculations of two-phase materials: Void nucleation in dual-phase steels
Yalçınkaya, Tuncay; Çakmak, Serhat Onur; Tekoğlu, Cihan (Elsevier BV, 2021-05-01)
© 2020 Elsevier B.V.A crystal plasticity based finite element (CPFE) framework is developed for performing representative volume element (RVE) calculations on two-phase materials. The present paper investigates the mechani...
Aerodynamic shape optimization of wind turbine blades for minimizing power production losses due to icing
Yirtici, Ozcan; Tuncer, İsmail Hakkı (2021-05-01)
Ice formation on a wind turbine alters the airfoil profiles of the blades and causes degradation in the aerodynamic performance of the wind turbine and the resulting power production losses. Since the blade profile plays a...
Effects of inflow boundary layer on the wake of a radially non-uniform porous disk
Abdulrahim, Anas; Akpolat, M. Tuğrul; Hassanein, Abdelrahman; Perçin, Mustafa; Uzol, Oğuz (2021-05-01)
© 2021 Author(s).This study presents the results of an experimental investigation focusing on the effects of the inflow boundary layer on the wake characteristics of a 0.12 m diameter porous disk with radially non-uniform ...
Numerical investigations on the hydrogen jet pressure variations in a strut based scramjet combustor
Suppandipillai, Jeyakumar; Kandasamy, Jayaraman; Sivakumar, R.; Karaca, Mehmet; Karthik, K. (2021-04-01)
Asymmetric vortex shedding in the wake of an abruptly expanding annular jet
Vanierschot, Maarten; Perçin, Mustafa; van Oudheusden, Bas W. (2021-04-01)
© 2021, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.Abstract: In this paper, the structure of the turbulent wake behind the inner tube of a suddenly expanding annular jet...
Flutter Optimization of a Wing-Engine System with Passive and Active Control Approaches
Asadi, Davood; Farsadi, Touraj; Kayran, Altan (2021-04-01)
In the present study, the flutter performance of a composite thin-walled beam wing-engine system is optimized by implementing two different control approaches: 1) passive open-loop and 2) active closed-loop control. Sequen...
Development of a procedure to model the mechanical behavior of composites with embedded element method by considering the matrix non-linearity
ŞIK, ALP; Gürses, Ercan; SABUNCUOĞLU, BARIŞ (2021-03-01)
Embedded element method is considered to be a reliable and efficient method to analyze the mechanical behavior of composite materials. However, the predicted behavior of individual constituents can be inaccurate in case th...
In-situ investigation of dynamic failure in [0(5)/90(3)](5) CFRP beams under quasi-static and low-velocity impact loadings
Bozkurt, Mirac Onur; Çöker, Demirkan (2021-03-01)
In this paper, experimental work to investigate the failure sequence in cross-ply CFRP beams under quasi-static and low-velocity impact (LVI) loadings is presented. [0(5)/90(3)](s) CFRP beams with thick clustered plies are...
Flutter study of flapwise bend-twist coupled composite wind turbine blades
Farsadi, Touraj; Kayran, Altan (2021-03-01)
Bending-twisting coupling induced in big composite wind turbine blades is one of the passive control mechanisms which is exploited to mitigate loads incurred due to deformation of the blades. In the present study, flutter ...
Numerical investigation of vortical flows over a close-coupled delta canard-wing configuration
Yutuk, Kaan; Tikenogullari, Alp; Tuncer, İsmail Hakkı (2021-02-01)
In this study, vortex dominated flows over a close-coupled canard-wing-body configuration at high angles of attack are studied by using the open-source flow solver, SU2 in a parallel computing environment. Validation studi...
Modeling and numerical simulations of lignite char gasification with CO2: The effect of gasification parameters on internal transport phenomena
Karaca, Mehmet; Kaya, Deniz; Yozgatlıgil, Ahmet; Gokalp, Iskender (Elsevier BV, 2021-02-01)
The purpose of this study is to develop an experimental data-based char particle gasification model in order to assess the effects of particle size, gasification temperature and char generation heating rate on global gasif...
Intersonic shear crack propagation using peridynamic theory
Yolum, Ugur; Çöker, Demirkan; Guler, Mehmet A. (2021-02-01)
Dynamic crack propagation of mode-II cracks is simulated using bond-based Peridynamic Theory (PD) implemented in finite element analysis software ABAQUS. The specimen is a bonded homogeneous Homalite plate with a pre-notch...
Misorientation and grain boundary orientation dependent grain boundary response in polycrystalline plasticity
Yalçınkaya, Tuncay; ÖZDEMİR, İZZET; Tandoğan, İzzet Tarık (2021-02-01)
This paper studies the evolution of intergranular localization and stress concentration in three dimensional micron sized specimens through the Gurtin grain boundary model (J Mech Phys Solids 56:640-662, 2008) incorporated...
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