Browsing Makine Mühendisliği Bölümü Makale Koleksiyonu by Issue Date
Now showing items 1-20 of 26
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A micro-damage investigation on a low-alloy steel tested using a 7.62-mm AP projectile | [Raziskava mikropoškodb malolegiranega jekla po preizkusu s kroglo AP 7,62 mm]
(INST ZA KOVINSKE MATERIALE I IN TEHNOLOGIE, 2011)Low-alloy steels have been widely used as an armor material in defense systems due to their superior mechanical and weldability properties. In this study, microdamage formation in an AISI 4140 steel, which was hit by 7.62-mm ... -
Effect of the martensite volume fraction on the machining of a dual-phase steel using a milling operation
(INST ZA KOVINSKE MATERIALE I IN TEHNOLOGIE, 2011)Dual-phase steels are attractive because of their good combination of strength and ductility. However, an increase in the martensite content will decrease the steel's machinability significantly. Therefore, optimum cutting ... -
Investigation on the rheological behavior of Al-Fe-V-Si/Alumina composite powders
(REDAKCIA KOVOVE MATERIALY,, 2012)In this paper, the rheological properties of the feedstocks of Al-Fe-V-Si and Al-Fe-V-Si composites reinforced with alumina were investigated. The feedstocks, containing four different types of powder (Al-Fe-V-Si, Al-Fe-V-Si ... -
Investigation on the behaviour of the functionaly gradient material consisting of boron carbide and aluminum alloy
(INST ZA KOVINSKE MATERIALE I IN TEHNOLOGIE, 2012)In the current study the effect of different temperatures on the aging behaviour of a functionally gradient material was investigated to observe the variation of hardness with respect to the aging time. To do this, the ... -
Experimental detemination of convective heat transfer coefficient during open sun and green- house drying of apple slices
(EDP SCIENCES., 2016)A small scale greenhouse type dryer was designed and tested. Convective heat transfer coefficient of apple slices was identified under open sun at natural convection mode and in greenhouse drying at natural and forced ... -
Thermodynamic analysis of bi- evaoparator ejector refrigeration cycle using R744 as natural refrigerant
(YILDIZ TECHNICAL UNIV., 2016)Researchers have been focused on refrigerant R744 because it is a natural refrigerant and its Global Warming Potential value is 1. However, coefficient of performance (COP) of refrigeration systems that use R744 as refrigerant ... -
Novel packing materials for open liquid desiccant system
(ELSEVIER SCIENCE BV, 2016)The objective of this study is to design and test a liquid dehumidification system that can operate with a maximum performance under atmospheric conditions without any mass transfer problems. For this purpose, polycarbonate ... -
Thermodynamic analysis of a refrigeration system with double evaporators and ejector
(GAZI UNIV,, 2016)In this study, theoretical investigations of double evaporator refrigeration system and with adding an ejector to the current system were carried out using energy and momentum equations. The relative increase in COP with ... -
Structural design and analysis of a servo crank press
(ELSEVİER, 2016)Due to precision, flexibility, simplicity in construction, easy control, higher speed and lower energy consumptions, servo presses have recently become popular in metal forming applications. Servo press technology combines ... -
Sıvı desikant nem alma sisteminin tasarımı ve performansının geliştirilmesi
(GAZİ ÜNİV., 2017)Bu çalışmada, mekanik nem alma sistemlerinin yerine kullanılabilecek bir sıvı desikant nem alma sisteminin tasarımı yapılarak termodinamik analizi yapılmıştır. Tasarlanan ve imalatı yapılan açık sıvı nem alma sisteminin ... -
An experimental study on a bus air conditioner to determine its conformty to design and comfort condition
(Yildiz Technical University Press, 2017)The air conditioning system for a bus should be selected considering a number of parameters, including passenger capacity, local climatic conditions, and fuel consumption. It is possible to determine whether a selected air ... -
Absorbsiyonlu (LiBr-su) nem alma sisteminin ısıl performans değerlerinin deneysel olarak araştırılması
(ÇUKUROVA ÜNİV., 2017)Bu çalışmada,mekanik nem alma sistemlerinin yerine kullanılabilecek, nem alma ve rejenerasyon kolonlarında, daha önce kullanılmamış, polikarbonatdolgu malzemesi kullanılan bir açık sıvı nem alma sisteminin deneysel ... -
Sıvı desikant nem alma sisteminin tasarımı ve performansının geliştirilmesi
(GAZİ ÜNİV., 2017)Bu çalışmada, mekanik nem alma sistemlerinin yerine kullanılabilecek bir sıvı desikant nem alma sisteminin tasarımı yapılarak termodinamik analizi yapılmıştır. Tasarlanan ve imalatı yapılan açık sıvı nem alma sisteminin ... -
Energy and exergy analysis of a combined refrigeration and waste heat driven organic rankine cycle System, thermal Science
(VINCA INST NUCLEAR SCI., 2017)Energy and exergy analysis of a combined refrigeration and waste heat driven organic Rankine cycle system were studied theoretically in this paper. In order to complete refrigeration process, the obtained kinetic energy ... -
Numerical investigation of flow and heat transfer in communicating converging and diverging channels
(Yildiz Technical University, 2018)Fluid flow and heat transfer in communicating converging and diverging channel has been numerically investigated. Channels are assumed to be at constant wall temperature and the flow is assumed to be steady state and ... -
Energy and exergy analysis of an organic Rankine-Brayton combined cycle
(GAZI UNIV, 2018)In this study, thermodynamic analysis of reheat and intercooled Brayton cycle combined with organic Rankine cycle (ORC) using waste heat from intercooler in Brayton cycle as heat source is presented. The effects of different ... -
Performance improvement potentials of low global warming potential refrigerants for intercity bus air conditioning system
(Serbian Society of Heat Transfer Engineers, 2018)In this study, theoretical investigation of two evaporator ejector refrigeration system was carried out based on energy and exergy analysis using R134a and low global warming potential refrigerants (namely R1234yf and ... -
The numerical study of heat transfer enhancement using Al2O3-water nanofluid in corrugated duct application
(Yildiz Technical University, 2018)Heat transfer enhancement in channel flow is investigated in the present study by using corrugated duct in lieu of smooth duct. In this regard, periodic different cavities are applied on the duct walls using the same aspect ... -
Optimization of the pool boiling heat transfer in the region of the Isolated bubbles using the ABC algorithm
(ISFAHAN UNIV TECHNOLOGY, 2019)The region of the isolated bubble regime, in which the bubbling starts, is a very significant process for boiling heat transfer. In this study, Artificial Bee Colony algorithm (ABC), which is mainly based on the searching ... -
Modeling of heat transfer coefficient in solar greenhouse type drying systems
(MDPI, 2019)As a sustainable energy source, solar energy is used in many applications. A greenhouse type dryer, which is a food drying system, directly benefits from solar energy. Convective heat transfer coefficient (h(c)) is an ...