Güncel Gönderiler: Makine Mühendisliği Bölümü Koleksiyonu
Toplam kayıt 286, listelenen: 241-260
-
Experimental investigation of heat transfer characteristics and wall pressure distribution of swirling coaxial confined impinging air jets
(Pergamon-Elsevier Science Ltd, 2018)In the present study, swirling coaxial confined impinging turbulent air jets issuing from a novel designed nozzle is studied experimentally. Heat transfer characteristics and pressure distribution on the impingement plate ... -
Experimental investigation of flow boiling in single minichannels with low mass velocities
(Pergamon-Elsevier Science Ltd, 2018)Flow boiling characteristics in a single minichannel with the aspect ratio of 2 (1.8 mm width and 0.9 mm height) are studied experimentally. Experiments are conducted for different values of the wall heat flux (in the range ... -
Improving thermal power of a cylindrical solar cooker via novel micro/nano porous absorbers: A thermodynamic analysis with experimental validation
(Pergamon-Elsevier Science Ltd, 2018)In this paper, cylindrical solar cookers with microporous absorbers are experimentally and numerically investigated in terms of thermodynamic performance figures. For a typical spring day in Bayburt, which is a good example ... -
Thermoelectric coolers (TECs): from theory to practice
(Springer, 2019)Thermoelectric coolers (TECs) are solid state units, which provide reliable energy conversion with no noise or vibration. They are also lightweight and do not include any moving parts. the current coefficient of performance ... -
Bor ile yapılan tane inceltmenin Al-30Zn alaşımının mikroyapı ve mekanik özelliklerine etkisi
(Gazi Univ, Fac Engineering Architecture, 2019)In this study, one binary aluminum-zinc (Al-30Zn) alloy and nine ternary aluminum-zinc-boron [Al-30Zn-(0.01-2) B] alloys were produced by permanent mold casting method. Structural properties of the produced alloys were ... -
Room temperature superplaticity in fine/ultrafine grained materials subjected to severe plastic deformation
(Japan Inst Metals & Materials, 2019)Achieving superplasticity at high temperatures and at very low strain rates is considered to be the most important disadvange of superplastic forming processes. Therefore, it is crucial to achieve superplastic behavior at ... -
Prediction of pressure drop for flow boiling in rectangular multi-microchannel heat sinks
(Taylor & Francis Inc, 2019)In this study, two new correlations are developed to predict pressure drop for the flow boiling in micro systems with low mass flux. the correlations developed rely on extensive experimental results. Experiments are conducted ... -
Effect of hydraulic diameter on flow boiling in rectangular microchannels
(Springer, 2019)An experimental study is conducted to investigate the effect of hydraulic diameter on the saturated flow boiling characteristics of deionized water in parallel rectangular microchannels. Experiments have been performed for ... -
A parametric study on thermodynamic performance of a SOFC oriented hybrid energy system
(Pergamon-Elsevier Science Ltd, 2019)In this paper, a parametric study of the performance of a SOFC system for several types of supplied fuels is carried out. A SOFC system which is assisted by some energy resources, namely biomass, solar energy and natural ... -
The mechanical compression performance of ultra-fine grained stainless steel pyramidal lattice core
(Taylor & Francis Inc, 2019)Severe plastic deformation (SPD) techniques are prospective ones having ability for desirable high mechanical properties to be achieved without any chemical change in metals. Equal-channel angular pressing (ECAP), one of ... -
Pressure wave propagation in pressurized thin-walled circular tubes under axial impact
(Pergamon-Elsevier Science Ltd, 2019)The pressurized thin-walled tubes are called as a member of adaptive energy absorbers of which energy absorbing performance can be controlled by variation of internal pressure. in this context, this study numerically ... -
Effect of strontium and magnesium additions on the microstructure and mechanical properties of Al-12Si alloys
(Korean Inst Metals Materials, 2019)In this study, a binary Al-12Si, eight ternary Al-12Si-Sr, and six quaternary Al-12Si-0.1Sr-(0.2-1)Mg alloys were produced by permanent mold casting. It was observed that microstructure of the binary alloy consisted of the ... -
The effect of Total flowrate on the cooling performance of swirling coaxial impinging jets
(Springer, 2019)Thermal management ability of swirling coaxial confined impinging air jets (SCCIAJ) are experimentally studied for different total flowrate. the coaxial structure of the jet is provided by a nozzle which is a cylindrical ... -
Optimised performance of a thermally resistive PV glazing technology: An experimental validation
(Elsevier, 2019)Thermally resistive PV glazing (TRPVG), which is a recently developed technology for low/zero carbon buildings, is in the centre of interest worldwide as a consequence of multifunctional benefits of this novel product such ... -
Sustainable ventilation strategies in buildings: CFD research
(Elsevier, 2019)Developing technology and architectural design techniques have affected the field of architecture to a great extent. As a result, human comfort has become increasingly important in recent years. A natural ventilation cooling ... -
Influence of ventilation strategies on dispersion and removal of fine particles: An experimental and simulation study
(Taylor & Francis Inc, 2020)In this study, effect of inlet/outlet configurations on the dispersion and removal of fine particles are examined experimentally and numerically. Ten different inlet/outlet configurations are tested for three different ... -
Effect of grain refinement with titanium on the microstructure, mechanical and corrosion properties of Al-25Zn alloy
(Gazi Univ, Fac Engineering Architecture, 2020)In this study, one binary Al-25n alloys and eleven ternary aluminum-zinc-titanium alloys, Al-25Zn-0.01Ti, Al-25Zn-0.03Ti, Al-25Zn-0.04Ti, Al-25Zn-0.05Ti, Al-25Zn-0.075Ti, Al-25Zn-0.1Ti, Al-25Zn-0.2Ti, Al-25Zn-0.4Ti, ... -
Effect of different zinc contents on the structural, mechanical and tribological properties of EN AC-48100 (Al-17Si-4Cu-Mg) Alloy
(Gazi Univ, Fac Engineering Architecture, 2020)In this study, Al-17Si-4Cu-0.6Mg-0.2Ti which is based of the EN AC-48100 alloy, Al-17Si-4Cu-0.6Mg0.2Ti-1Zn, Al-17Si-4Cu-0.6Mg-0.2Ti-2Zn, Al- 17Si-4Cu-0.6Mg-0.2Ti-3Zn, Al-17Si-4Cu-0.6Mg-0.2Ti-4Zn and Al-17Si-4Cu-0.6Mg-0.2Ti-5Zn ... -
A review on environmental impacts from aviation sector in terms of life cycle assessment
(Inderscience Enterprises Ltd, 2020)The main objective of this paper is, in terms of LCA (life cycle assessment), to compile and discuss, environmental impacts of aircraft, gas turbine engine and components, and maintenance process and operations in the ... -
Prediction of two-phase heat transfer coefficient of flow boiling in minichannels
(Taylor & Francis Inc, 2020)The present study mainly concentrates on the prediction of two-phase heat transfer coefficient for saturated flow boiling conditions in minichannels. the experimental database has been generated through systematic experiments ...