Detailed measurements of dynamic stability derivatives under roll oscillations for standard dynamic model in Ankara wind tunnel

Nacaklı, Yavuz


Experimental evaluation of “ball rubber bearings” at different temperatures
Erdal, Serkan; Caner, Alp; Department of Civil Engineering (2010)
Rubber material used in seismic isolation systems has a tendency to stiffen in cold climate conditions. Structural responses of rubber based seismic isolation bearings are known to be temperature dependent. The main focus of this research is to investigate the temperature related behavior shifts at a certain type of a rubber based seismic isolation system. This research is a complementary study to a recent experimental study on a newly developed seismic isolator called “Ball Rubber Bearing” (BRB). BRBs can ...
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Özdemir, Merve; Yozgatlıgil, Ahmet; Department of Mechanical Engineering (2017)
Solar thermal and biomass combustion systems can be hybridized via a Rankine cycle to have a continuous electricity generation and lower CO2 footprint. Disadvantages of these two renewable technologies can be overcome by hybridization. In this work; we develop a simulation model for Rankine cycle based, solar-biomass hybrid power plants using the ASPEN PLUS software. Solar parabolic collectors and biomass combustion are arranged in parallel to produce steam for power generation. Using the simulation model; ...
Individual differences in learning with hypermedia: effects of students cognitive styles, computer competency levels, and prior knowledge levels on learning strategies
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Hipermedya İle Öğrenmede Kişisel Farklılıklar: Bilişsel Stillerin, Bilgisayar Kullanım Yeterliği ve Ön Alan Bilgisi Düzeylerinin Öğrenme Stratejileri Üzerine Etkisi - Bu çalışma, öğrencilerin, bilişsel stilleri, bilgisayar kullanımı yeterlik düzeyleri ve ön alan bilgilerinin eğitim amaçlı bir hipermedya programındaki öğrenme stratejileri üzerindeki etkilerini incelemektedir. Bu amaçla, Web destekli bir öğrenme ortamındaki 111 öğrenciden 16 sı bilişsel stilleri, bilgisayar kullanımı yeterlik düzeyleri ve ön ...
Numerical investigation of circulating fluidized bed riser hydrodynamics for concentrating solar thermal receiver applications
Bilyaz, Serhat; Tarı, İlker; Department of Mechanical Engineering (2015)
Various heat transfer fluids and thermal storage materials are considered for concentrating solar power systems to improve the storage capability of the system which compensates the fluctuating behavior of the solar resources. Solid particles can be a good alternative since they have high sensible heat capacity. In addition, they are cheap, environmentally benign and chemically and mechanically stable at high temperatures. In this thesis, hydrodynamics of circulating fluidized bed solar receiver was numeric...
Quantitative electrostatic force measurement in AFM
JEFFERY, Steve; Oral, Ahmet; Pethica, John B. (2000-04-02)
We describe a method for measuring forces in the atomic force microscope (AFM), in which a small amplitude oscillation(similar to 1 Angstrom(p-p)) is applied to a stiff(similar to 40 N/m) cantilever below its first resonant frequency, and the force gradient is measured directly as a function of separation. We have used this instrument to measure electrostatic forces by applying an ac voltage between the tip and the sample, and observed a variation in contact potential difference with separation. We also sho...
Citation Formats
Y. Nacaklı, “Detailed measurements of dynamic stability derivatives under roll oscillations for standard dynamic model in Ankara wind tunnel,” M.S. - Master of Science, Middle East Technical University, 2003.