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Recent submissions

Makale Koleksiyonu: Recent submissions

Now showing items 101-120 of 433

Numerical calculation of stress concentration of various subsur-face and undercutting pit types

Ekşi, Seçil (CARL HANSER VERLAG, 2018)

In this study, the stress concentration effect of single subsurface (D type) pit types and undercutting (Etype) pit types with various pit depth and diameter has been investigated with respect to uniaxial loading by ...
Experimental investigation of optimum thermal performance and pressure drop of water-based Al2O3, TiO2 and ZnO nanofluids flowing inside a circular microchannel

Adnan Topuz; Engin, Tahsin; A. Alper Ozalp; Beytullah Erdogan; Serdar Mert; Alper Yeter (SPRINGER, 2018)

This paper presents thermal performance and pressure drop characteristics of water-based nanofluids flowing through a horizontal circular microchannel under the constant surface temperature condition, experimentally. Al2O3 ...
Evaluation of mixed mode-I/II criteria for fatigue crack propagation using experiments and modeling

Oguzhan Demir; Ayhan, Ali Osman; İriç, Sedat; Huseyin Lekesiz (ELSEVIER SCIENCE INC, 2018)

In this study, in-plane mixed mode-I/II fatigue crack growth simulations and experiments are performed for the Al 7075-T651 aluminum alloy which is widely used in the aerospace industry. Tests are carried out under different ...
Study of the Mechanical Properties of Nano Silver Nitrate Filled Polypropylene Composites

Özel, Ahmet; Ünal, Hüseyin; Mimaroğlu, Abdullah (WILEY-V C H VERLAG GMBH, 2018)

In this investigation, the mechanical properties of silver nitrate nanoparticles filled polypropylene composite is evaluated. The silver nitrate particles are added to the matrix by 1, 3, 5, and 10% by weight. The composite ...
Numerical and experimental investigations of the effects of the second injection timing and alcohol-gasoline fuel blends on combustion and emissions of an HCCI-DI engine

Ali Turkcan; Mustafa Deniz Altinkurt; Coşkun, Gökhan; Mustafa Canakci (ELSEVIER SCI LTD, 2018)

In this study, experimental and numerical investigations of a homogeneous charge compression ignition (HCCI) combustion engine were performed using alcohol-gasoline fuel blends and two-stage direct injection (TSDI) strategy. ...
Assessment of single-serpentine PEM fuel cell model developed by computational fluid dynamics

Eker Kahveci, Elif; Taymaz, İmdat (ELSEVIER SCI LTD, 2018)

In this study, a three-dimensional, single-phase model has been established to investigate the performance of proton exchange membrane fuel cell (PEMFC) with serpentine flow fields. The model was operated in the temperature ...
IOP Conference Series-Earth and Environmental Science

E. E. Kahveci; Taymaz, İmdat (IOP PUBLISHING LTD, 2018)

In this study it was experimentally investigated the effect of mass flow rates of reactant gases which is one of the most important operational parameters of polymer electrolyte membrane (PEM) fuel cell on power density. ...
Experimental and numerical studies on the folding response of annular-rolled Al tube

O. H. Mete; M. Yalcin; Genel, Kenan (ELSEVIER SCI LTD, 2018)

It is important to increase energy absorption of a tube under axial loading without using any reinforcement material. Also, such a process results directly in an increase of specific energy absorbing (SEA) capability of ...
Modelling the superplastic deformation process of 2024 aluminium alloys under constant strain rate: use of finite element technique

Mimaroğlu, Abdullah (ELSEVIER SCI LTD, 2003)

In recent years, there is a considerable interest in the application of superplastic forming for the fabrication of complex parts in the aircraft and automobile industries. In this field, the existing analytical theory is ...
Numerical and experimental investigations of the effects of the second injection timing and alcohol-gasoline fuel blends on combustion and emissions of an HCCI-DI engine

Coşkun, Gökhan (2018)
Experimental and Stochastic Reactor Modeling Results of an HCCI Engine Fueled with Primary Reference Fuel

Yaşar, Halit; Usta, Emel; Demir, Ümmühan (AMER CHEMICAL SOC, 2018)

In recent years, much research has been performed in order to decrease fuel consumption, noise, and exhaust emission levels in internal combustion engines. In this study, the effects of excess air coefficient on performance ...
Mechanical properties and electrochemical behavior of porous Ti-Nb biomaterials

Yılmaz, Eren; Gökçe, Azim; Fındık, Fehim; Hamit Ozkan Gulsoy; İyibilgin, Osman (ELSEVIER SCIENCE BV, 2018)

Ti-Nb-based alloys - with their superior mechanical properties and biocompatibility - are attractive biomaterials for orthopedic implants. By producing this alloys with a porous structure, it is possible to achieve mechanical ...
An experimental and modeling study to investigate effects of different injection parameters on a direct injection HCCI combustion fueled with ethanol–gasoline fuel blends

Coşkun, Gökhan (2018)
Preparation, characterization and evaluation of bio-based magnetic activated carbon for effective adsorption of malachite green from aqueous solution

Altıntığ, Esra; Muge Onaran; Ahmet Sari; Altundağ, Hüseyin; Pehlivan, Hüseyin; Mustafa Tuzen (ELSEVIER SCIENCE SA, 2018)

The removal feasibility of malachite green (MG) on Magnetic Activated Carbon (Fe3O4-AC) from aqueous solution was investigated. The physicochemical/morphological properties of the prepared novel sorbents were identified ...
Tribological Properties of Nanoclay Reinforced Polyamide-6/Polypropylene Blend

Mimaroğlu, Abdullah; Ünal, Hüseyin; S. H. Yetgin (WILEY-V C H VERLAG GMBH, 2018)

In this study, the tribological performance of polyamide-6 (PA-6), polypropylene (PP), polyamide-6/polypropylene (PA-6/PP) polymer blend, and nanoclay reinforced polyamide-6/polypropylene composite are investigated. Nanoclay ...
A Practical Launcher Thermal Analysis Tool for Three-axis Stabilized GEO Communication Satellites

Murat Bulut; Sözbir, Nedim; A Hacioglu; Mf Unal; Altan, Ozan; M Yorukoglu; Ms Yildiz (IEEE, 2017)

The Practical Launcher Thermal Analysis Tool can be a useful tool for the early design stage of three-axis stabilized GEO communication satellites.
The Effect of Uncertainty Values of Thermal Control System on GEO Satellites

Erkam Arslantas; Murat Bulut; Sözbir, Nedim; A Hacioglu; Mf Unal; Altan, Ozan; M Yorukoglu; Ms Yildiz (IEEE, 2017)

Temperature constantly changing across space hence low and high temperature occurs on geostationary orbit (GEO) communication satellites by the impact of environmental heat loads. Thus, the thermal control analysis becomes ...
IOP Conference Series-Earth and Environmental Science

Ünverdi, Murat; R Renato; A Barnett; T Shamim; K Eguchi (IOP PUBLISHING LTD, 2017)

In this study, the availability of waste heat in a power generating capacity of 47.4 MW in Germencik Geothermal Power Plant has been investigated via binary geothermal power plant. Refrigerant fluids of 7 different single ...
CORROSION RESISTANCE OF AS-PLATED AND HEAT-TREATED ELECTROLESS DUBLEX Ni-P/Ni-B-W COATINGS

Behiye Yuksel; Erdoğan, Garip; Baştan, Fatih Erdem; Yıldız, Raşid Ahmed (INST ZA KOVINSKE MATERIALE I IN TEHNOLOGIE, 2017)

In this study, Ni-P/Ni-B-W dublex coatings were deposited on carbon steel substrates (AISI 1020) using the electroless plating process and their microstructure and corrosion properties were systematically evaluated based ...
Friction and wear behaviour of unfilled engineering thermoplastics

Ünal, Hüseyin; Mimaroğlu, Abdullah (ELSEVIER SCI LTD, 2003)

Friction, wear and fatigue are three most commonly encountered industrial problems leading to the replacement of components and assemblies in engineering. In this investigation we studied and explored the influence of test ...