• M1 ve M2 aydınlatma sınıfı yollar için geliştirilen bir COB LED’li yol aydınlatma armatür modelinin optik tasarımı 

  Yiğit Ünlü, Duygu; Şahin, Necmettin (Ankara Hacı Bayram Veli Üniversitesi, 2023)

  Geleneksel yol aydınlatma teknolojileriyle karşılaştırıldığında, ışık yayan diyotlu (LED’li) yol aydınlatma armatürleri; yüksek enerji verimliliği, daha uzun çalışma ömrü ve daha iyi ışık dağılımı gibi potansiyel avantajlara ...

• Experimental investigation of the heat transfer characteristics of a pulsating impinging jet on a flat surface 

  Akdağ, Ünal; Akçay, Selma; Karabayır, M. Levent (Gazi Üniversitesi, 2023)

  In this research, cooling of the target surface consisting of a flat plate with constant heat flux using a pulsating impinging jet is investigated experimentally. In the investigations, the jet Reynolds number (Rej), Prandtl ...

• The optical design of a COB LED road lighting fixture model developed for M1 and M2 lighting class roads 

  Yiǧit Ünlü, Duygu; Şahin, Necmettin (Gazi Üniversitesi, 2023)

  In this study, the optical design and analysis of a road lighting fixture model with COB LED suitable for M1 and M2 lighting class roads was carried out. In the design phase, Cree-XLamp-CXA1830 LED was preferred as the ...

• Investigation of the mechanical, tribological and corrosive properties of epoxy composite coatings reinforced with recycled waste tire products 

  Karabörk, Fazliye (BME-PT and GTE, 2022)

  Reaxys Chemistry database information Indexed keywords SciVal Topics Metrics Abstract The present work aims at evaluating the mechanical and anti-corrosion behaviour of epoxy coatings modified by recycled waste ...

• The optical design of a led-reflector module for road illumination 

  Yiğit Ünlü, Duygu (LLC Editorial of Journal ""Light Technik"", 2022)

  In recent years, there has been a trend towards energy-efficient, long-lasting, environmentally friendly, and technology-compatible LED road luminaires. In this study, the optical design and analysis of the LED road luminaire ...

• Parameter estimation study of polymer electrolyte membrane fuel cell using artificial hummingbird algorithm 

  Çelik, Muhammet; Soylu, Selim (SAGE Publications Ltd, 2022)

  This study represents a comprehensive investigation of the performance of Artificial Hummingbird Algorithm for parameter estimation for Polymer Electrolyte Membrane Fuel Cell. With this purpose, four commercial fuel cell ...

• Heat transfer enhancement in a square channel with a set of triangular prisms: an experimental study 

  Akdağ, Ünal; Yükseltürk, Melike; Palancıoğlu, Hakan; Çalışkan, Sinan (Taylor and Francis Ltd., 2022)

  In this study, heat transfer behavior in a channel adapted with a set of equilateral triangular prisms was investigated experimentally in a turbulent flow regime, with a range of Reynolds numbers corresponding to 1x104<Re<8x104. ...

• Numerical analysis of thermal and hydraulic performance of pulsating nanofluid flow over cam-shaped tube bundles 

  Akçay, Selma; Akdağ, Ünal (Institute for Ionics, 2022)

  In this study, the hydraulic and thermal performance of laminar pulsating nanofluid flow over a cam-shaped tube bundle was investigated. Numerical solutions were carried out with the ANSYS Fluent software. As a working ...

• Improvement of anti-corrosion performance (surface and near the cut edge) and mechanical properties of epoxy coatings modified with nano, micro and hybrid ZnO particles 

  Kabaoğlu, Emre; Karabörk, Fazliye; Balun Kayan, Didem; Akdemir, Ahmet (SAGE Publications Ltd, 2023)

  Composites were formed by incorporating nano, micro and hybrid-ZnO particles into the epoxy matrix at the same loading levels (3%) and applied at 90 μm thickness on the galvanized steel substrate using a film applicator ...

• Change on tetragonality of L10 phase with homogenization time on Ni50Mn29Sb21 shape memory heusler alloy 

  Eskil, Murat; Aldaş, Kemal (Springer, 2022)

  In this study, the effects of homogenization heat treatment on microstructural and magnetic properties of the Ni50Mn29Sb21 shape memory Heusler alloy was investigated. Ni–Mn–Sb alloy system may be an important candidate ...

• Yapıştırma ve çift pim bağlantılı tabakalı kompozit plakalarda pimler arası mesafe değişiminin gerilmelere etkisi 

  Erzincanlı, İlker; Benli, Salih (Uludağ Üniversitesi, 2022)

  Bu çalışmada çift pim bağlantısı uygulanmış ve epoksi yapıştırıcı ile yapıştırılmış cam fiber/epoksi tabakalı kompozit plakada farklı delik eksen pozisyonları için oluşan gerilmeler belirlenmiş ve karşılaştırılmıştır. ...

• An experimental study of the performance of a low-cost paper-based membraneless direct hydrogen peroxide fuel cell 

  Çelik, Muhammet (Mersin Üniversitesi, 2022)

  A paper-based membraneless direct hydrogen peroxide fuel cell was developed and tested under different potassium hydroxide concentrations (1 to 7 mol lt-1, stepping by 2), different hydrogen peroxide concentrations (1, 2, ...

• Eliptik boru demeti üzerinden geçen nanoakışkanların laminer akışının ısı transferine etkisi 

  Akdağ, Ünal; Akçay, Selma (TMMOB Makina Mühendisleri Odası, 2022)

  Bu çalışmada, sabit duvar sıcaklığına sahip eliptik boru demeti üzerinden geçen CuOsu nanoakışkanın laminer akışının ısı transferine ve sürtünme faktörüne etkileri sayısal olarak incelenmiştir. Çalışmada, farklı kesit ...

• Cıvatalı bağlantılarda delik toleransı ve cıvata sıkma torku değişiminin bağlantı dayanımına etkilerinin sayısal olarak incelenmesi 

  Saraç, İbrahim (Gazi Üniversitesi, 2022)

  Çözülebilir bağlantı şekillerinden olan cıvatalı bağlantıların, sitemlerde verimli ve emniyetli bir şekilde kullanılması için farklı parametrelere göre yük altındaki davranışlarının anlaşılması son derece önemlidir. Bu ...

• Environmental impact and energy saving of led lighting in university buildings 

  Yiğit Ünlü, Duygu (Parlar Scientific Publications, 2022)

  Energy saving in lighting has been seen as an important issue in recent years due to the increasing energy demand and global warming. The university building which is big and old construction is one of the major energy ...

• The numerical investigation of the effects of hole tolerance and bolt torque variation on the joint strength in the bolted joints 

  Saraç, İsmail (Gazi Universitesi, 2022)

  It is extremely important to understand the behavior of the bolted joints under load, according to different parameters, for the efficient and safe use of systems. In this study, the effect of hole tolerance and ...

• Investigation of the effects of surface roughness on stress distribution and moment carrying capacity at shrink-fitted joints 

  Saraç, İsmail (John Wiley and Sons Inc, 2022)

  An important design parameter in shrink-fitted joints is the average surface roughness values of the shaft and hub. During assembly, the surface roughness is crushed and the theoretical tightness value decreases between ...

• Failure analysis of simple overlap bonding joints and numerical investigation of the adhered tip geometry effect on the joint strength 

  Saraç, İsmail (Walter de Gruyter GmbH, 2021)

  This study was carried out in two stages. In the first step, a numerical study was performed to verify the previous experimental study. In accordance with the previous experimental study data, single lap joints models were ...

• Investigation effect of zinc nanoparticles on the mechanical and anticorrosion properties of epoxy coatings on stainless steel surface 

  Apsak, Merve; Akdemir, Ahmet; Karabörk, Fazliye; Yazman, Şakir (Gazi Üniversitesi, 2021)

  In this study, effects of zinc nanoparticles (ZNPs) on the mechanical properties of epoxy coatings and anticorrosion behavior on the stainless steel were investigated. The nanocomposites (NCs) were obtained by adding ZNPs ...

• Effects of nano reinforcing/matrix interaction on chemical, thermal and mechanical properties of epoxy nanocomposites 

  Yazman, Şakir; Uyaner, Mesut; Karabörk, Fazliye; Akdemir, Ahmet (SAGE Publications Ltd, 2021)

  This article investigates the impact of addition various types of nanoparticles with different structural, dimensional, and morphological properties on the interphase region formed between the particle/matrix and the curing ...

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