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    COMPARISON OF TRAFFIC DENSITIES AT DIFFERENT SIGNALIZATION TIMINGS IN ROUNDABOUTS
    (2018) Uludamar, Erinç; Tüccar, Gökhan
    The increasing number of vehicles triggers traffic jam which is one of the most important problems that occursin crowded cities. Signalization timing has a crucial role in controlling traffic flow and decreasing loss of time incity traffic. In order to reduce queue length and vehicle delays in traffic, the estimation of traffic concentration atdifferent signalization timings plays an important role. Traffic simulation tools such as RODEL, SIDRA, andVISSIM are used to understand the behavior of vehicles in traffic. In this study, VISSIM program was used todemonstrate queue lengths, vehicle delays and vehicular emission formations in a roundabout at differentsignalization timings. The study has been evaluated on a real case study to verify the differences between currentand proposed states. A roundabout in Adana (Turkey) was selected which is located at the city center with oversaturated traffic density for a case study. The model indicated that increment of the green time period of thesouth road from 22 seconds to 28 seconds resulted in improved queue lengths, vehicle delays and emissionformations of the vehicles which were around the roundabout.
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    Design and Analysis of Hydraulic Truck Unloading Platforms
    (2017) Uludamar, Erinç; Tüccar, Gökhan
    Dampersiz kamyonların yükünün boşaltılmasının en verimli yolundan birisi Hidrolik Kamyon Boşaltma Platformlarının (HKBP) kullanılmasıdır. HKBPler dizayn edilirken platformun güvenilirliği ve malzeme maliyeti göz önünde alınmalıdır. Bu sebeple, bu çalışmada, üç farklı HKBP tasarımı farklı operasyon pozisyonlarındaki gerilme dağılımları ve maliyeti düşünülerek karşılaştırılmıştır. CATIA V5 ve ANSYS Workbench yazılım programları üç boyutlu modellerin hazırlanması ve bu modellerin gerilme analizleri için kullanılmıştır. Yapısal analiz sonuçları en yüksek von-Mises gerilme dağılımlarının 93,41 MPa ve 210,29 MPa arasında olduğunu göstermiştir. Yapıda kullanılan malzemeler gerilme dağılımlarına göre seçilmiştir. Malzeme maliyeti karşılaştırılmış ve sonuçları da sunulmuştur. Ayrıca platform yapısının von-Mises gerilmelerinin yatay pozisyonda 45o eğik pozisyona göre daha yüksek olduğu bulunmuştur
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    Design and Finite Element Analysis of a Foldable and Single-Arm Wheelchair Lift for M-Class Vehicles
    (2019) Uludamar, Erinç
    Commercially, many types of lifts and ramps are available to help the wheelchair users getting on and offthe vehicles. In this study, a foldable wheelchair lift, which has a single arm was analysed by FiniteElement Method according to specified maximum carrying mass of 300 kg in Directive 2001/85/EC.Examination was carried out on the manufactured wheelchair lift to validate the result of Finite ElementAnalysis. Initial analyses have shown that the lift is insufficient to be safe. Hence a modification wasperformed on the lift. After the modification, maximum von-Mises stress was calculated as 300.15 MPain the cantilever beam of the platform which is produced by S355JR quality steel. The largest deformationwas measured as 82.4 mm and 78.3 mm on the manufactured lift and on the model, respectively. Modalanalysis indicates the result of the first eight modes occurred in low frequencies.
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    Editorial: The future prospects of alternative fuels
    (Frontiers Media SA, 2024) Uludamar, Erinç; Şanlı, Bengi; Ranjitha, J.; Raja Ahsan Shah, Raja Mazuir; Ilin?i?, Petar
    [No abstract available]
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    Effects of titanium-based additive with blends of butanol and diesel fuel on engine characteristics
    (Inderscience Enterprises Ltd., 2018) Yaşar, Abdulkadir; Keskin, Ali; Yildizhan, Şafak; Uludamar, Erinç; Ocako?lu, Kasim
    In this study, the effects of metal titanium dioxide and butanol additives on engine performance, combustion, emissions, vibration and noise characteristics were investigated experimentally. The experiments were conducted at various partial load conditions with diesel engine having variable compression ratio. Engine was fuelled with diesel fuel and butanol-diesel blends with titanium dioxide (TiO2)-based additive. The results revealed that the properties of the blend fuels with the additive did not change significantly compared to diesel fuel. Specific fuel consumption (SFC) values of the engine were improved with increment of alcohol ratio, especially at higher engine loads. Carbon monoxide (CO) and particulate matter emission values with blend fuels decreased up to 36.17% and 36.53%, respectively. Nitrogen oxide emission increased at low engine loads. Of all test fuels, engine noise and vibration values of B5T25 and B5T50 usually decreased, whereas those values of the other test fuels increased. Copyright © 2018 Inderscience Enterprises Ltd.
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    Evaluation of effects of compression ratio on performance, combustion, emission, noise and vibration characteristics of a VCR diesel engine
    (International Journal of Renewable Energy Research, 2018) Yildizhan, Şafak; Uludamar, Erinç; Özcanli, Mustafa; Serin, Hasan
    In this study, an experimental study has been evaluated on a variable compression ratio diesel engine to investigate the compression ratio effects on engine performance, combustion, emission, vibration, and noise characteristics. The result of engine characteristics were studied at 12:1, 14:1, and 16:1 compression ratios under partial load condition. Experimental engine was operated with diesel, biodiesel and diesel-biodiesel blends throughout the experiments. Experimental study indicated that compression ratio considerably affects the engine characteristics that measured in this study. It is observed that in the experiments, higher compression ratio results in higher brake thermal efficiency and thus lower specific fuel consumption. Higher compression ratios resulted with higher cylinder pressure and thus improved combustion. Increasing compression ratio improved carbon monoxide emission, however, increased carbon dioxide emission and nitrogen oxides formation. Also, noise and vibration of the engine reduced with the increment of compression ratio. © International Journal Of Renewable Energy Research, 2018.
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    Experimental investigation of noise characteristic of a compression ignition engine
    (2019) Uludamar, Erinç; Özcanlı, Mustafa; Çelebi, Kerimcan; Aydın, Kadir
    Noise is a very important phenomena for passenger comfort in a vehicle. Engine of the vehicles producedisturbing noises in different frequencies. In the application of acoustic, there are different filters to predict thesound pressure level and disturbing noises. The aim of the present study is to investigate the noise characteristicof a compression ignition engine at different weighting filters. In the experiments, the engine was fuelled withlow sulphur diesel and sunflower biodiesel fuels and it run at different engine speeds ranging from 1200 to 2400rpm, with steps of 300 rpm. The results indicated that noise characteristic of compression engine with enginespeed shows different trends at A- weighting filter than C- and Z- weighting filters especially at 1500 rpm.Moreover, in the study, it was cleared that the SPL decrease with the addition of biodiesel fuel regardless of itsratio.
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    Investigation of Seismic Behaviour of a Construction of a Conveyor Line in a Coal Power Plant
    (2023) Uludamar, Erinç; Egüz, Sinan; Çelebi, Kerimcan; Karaahmetli, Sedat
    The conveyor line that carries raw materials from storage area to inside of a facility is the main vessel of a coal power plant. Therefore, this critical line should be designed by considering the many loads likely to be exposed in the field in order for the plant to operate uninterruptedly. In this study, seismic behaviour of a construction of a conveyor line was investigated by using Finite Element Analysis. The structure of coal carrier conveyor line of a coal power plant, operating in Adana, Türkiye was considered as a case study. In the study, the parts of the conveyor line were modelled as 1-D. The modified acceleration history of Golcuk-1999 earthquake was applied on the structure on lateral direction. The results showed that the maximum stress is slightly higher than the elastic limit of the steel and less than the ultimate strength. Although the construction of the conveyor line withstands the applied loads, modification should be carried out to prevent the damage on the construction.
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    Investigations of Effects of Density and Viscosity of Diesel and Biodiesel Fuels on NOx and other Emission Formations
    (2018) Tüccar, Gökhan; Tosun, Erdi; Uludamar, Erinç
    In the present study, effects of fuel properties; such as viscosity and density of different biodiesels on engine exhaust emissions were investigated. Sunflower, corn and canola oils were used as raw materials of biodiesel fuels which were produced via transesterification method. In experiments, pure biodiesels were used as test fuels and diesel was used as reference fuel. The results indicated that viscosity and density of biodiesel fuels went up with a higher proportion of biodiesel. Engine experiments, which were conducted on a Mitsubishi Canter 4D34-2A, four-stroke, four-cylinder diesel engine indicated that carbon monoxide (CO) emission reduced with the utilization of fuels that have higher viscosity and density. On the other hand, carbon dioxide (CO2) and nitrogen oxide (NOx) emission had opposite trend. Both emission values were increased with higher biodiesel ratios.
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    Noise and Exhaust Emission Characteristic of a Diesel Engine Fuelled with Natural Gas and Blends of Biodiesel and Diesel Fuels
    (2019) Uludamar, Erinç; Aydın, Kadir; Özcanlı, Mustafa
    High energy demand of modern society has led to environmental pollution which has become one of the biggest problems for almost all living creatures. Therefore, the effect of the energy sources on emissions has been investigated by researchers for decades. In this research, the effect of natural gas and biodiesel which was produced from corn oil on emissions of a diesel engine was experimentally investigated. In engine experiments, natural gas used at the engine as a secondary fuel while low sulphur diesel fuel and its blend with corn biodiesel (20% and 40% by volume) was used as a primary fuel. According to the results, compared to low sulphur diesel fuel, both natural gas and biodiesel usage improved the noise emission that was distributed from the diesel engine. Biodiesel blends resulted in lower CO emission of 4,05% and 7,63% for CoB20 and CoB40, respectively, whereas introduction of natural gas caused significant rise of the emission. However, increment of CO2 emission caused by biodiesel addition into low sulphur diesel fuel was well compensated by the addition of natural gas. Moreover, 4,08%, 18,00% increment of NOx emissions caused by CoB20 and CoB40 usage was also compensated up to 33,0% by the introduction of natural gas.