Kahraman Albayrak

E-mail
albayrak@metu.edu.tr
Department
Department of Mechanical Engineering
A COMPARISON OF THE THERMAL PERFORMANCE OF A CONVENTIONAL FIN BLOCK AND PARTIALLY COPPER AND ALUMINUM FOAM EMBEDDED HEAT SINKS
Ataer, S. Kaancan; Yamali, Cemil; Albayrak, Kahraman (2020-01-01)
In this research, the metal foams with 4,8,16 pores/cm, an aluminium foam which has 0.93 porosity and a copper foam which has 0.90 porosity that are integrated into a heat sink with a special geometry were designed and tes...
Kalınlık-Veter Oranının Düşük Ok Açılı Delta Kanat Üzerindeki Akış Yapısına Etkisinin Nümerik İncelenmesi
Cesur, Ismail Sadi; Yavuz, Mehmet Metin; Albayrak, Kahraman (2018-09-12)
Bu çalışmada 35 derece ok açısına sahip delta kanadın kalınlık-veter oranının akış yapısına etkisi nümerik olarak incelenmiştir. Analizler çalışmanın ilk safhalarında kalınlık-veter oranları t/C = 0.0475 ve 0.19, Reynolds ...
Use of artificial neural networks for the prediction of time-dependent air speed variation in metro stations
KOC, Gencer; Sert, Cüneyt; Albayrak, Kahraman (2018-09-01)
In this study, the time-dependent, induced air speeds at critical sections of underground metro stations are assessed using a novel one-dimensional data-driven approach. For this purpose, three artificial neural networks a...
A Fully Implicit Finite Volume Lattice Boltzmann Method for Turbulent Flow
Cevik, Fatih; Albayrak, Kahraman (2017-08-01)
Almost all schemes existed in the literature to solve the Lattice Boltzmann Equation like stream & collide, finite difference, finite element, finite volume schemes are explicit. However, it is known fact that implicit met...
Prediction of the maximum air velocities created by metro trains using an artificial neural network approach
KOC, Gencer; Sert, Cüneyt; Albayrak, Kahraman (2014-09-01)
The maximum air velocity created by a moving train inside a tunnel is obtained using an artificial neural network approach. A neural network model is developed to represent a single train travelling in a single tunnel. A s...
Prediction of Maximum Air Velocities Induced by Metro Trains in Tunnels Using Artificial Neural Networks
Koc, Gencer; Sert, Cüneyt; Albayrak, Kahraman (2014-09-01)
Utilization of neural networks for simulating vehicle induced air velocity in underground tunnels
Koç, G.; Albayrak, Kahraman; Sert, Cüneyt (2012-12-01)
Air velocities induced by underground vehicles in metro tunnels equipped with ventilation shafts are obtained using artificial neural networks. Complex tunnel shaft-systems with any number of tunnels and shafts and with mo...
Experimental investigation of three rotating parachutes
Yagiz, Ozgur Evren; Albayrak, Kahraman; Yidirim, R. Orhan (2006-09-01)
Free convection flow of Newtonian fluid along a vertical plate embedded in a double layer porous medium
Beithou, N; Aybar, HS; Albayrak, Kahraman; Erenay, O (2001-05-01)
Porous medium has got a great interest especially in the recent years, for its wide application in geophysics, petroleum, and air conditioning. Many studies related to porous medium were performed, and most of them are dea...
Oil entrainment in vertical refrigerant piping
Kesim, SC; Albayrak, Kahraman; Ileri, A (2000-12-01)
The aim of this study is to investigate the required refrigerant speed, hence minimum refrigeration load, for carrying the lubricating oil up in vertical sections of refrigerant lines. It is assumed that the downward flow ...
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