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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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    Öğe
    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.