The Experts below are selected from a list of 33 Experts worldwide ranked by ideXlab platform
Chang Sik Lee - One of the best experts on this subject based on the ideXlab platform.
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Spray and Combustion Characteristics of Biodiesel∕Diesel Blended Fuel in a Direct Injection Common-Rail Diesel Engine
Journal of Engineering for Gas Turbines and Power, 2008Co-Authors: Hyun Kyu Suh, Hyun Gu Roh, Chang Sik LeeAbstract:The aim of this work is to investigate the effect of the Blending ratio and pilot injection on the spray and combustion characteristics of biodiesel Fuel and compare these factors with those of diesel Fuel in a direct injection common-rail diesel engine. In order to study the factors influencing the spray and combustion characteristics of biodiesel Fuel, experiments involving exhaust emissions and engine performance were conducted at various biodiesel Blending ratios and injection conditions for engine operating conditions. The macroscopic and microscopic spray characteristics of biodiesel Fuel, such as injection rate, split injection effect, spray tip penetration, droplet diameter, and axial velocity distribution, were compared with the results from conventional diesel Fuel. For biodiesel blended Fuel, it was revealed that a higher injection pressure is needed to achieve the same injection rate at a higher Blending ratio. The spray tip penetration of biodiesel Fuel was similar to that of diesel. The atomization characteristics of biodiesel show that it has higher Sauter mean diameter and lower spray velocity than conventional diesel Fuel due to high viscosity and surface tension. The peak combustion pressures of diesel and Blending Fuel increased with advanced injection timing and the combustion pressure of biodiesel Fuel is higher than that of diesel Fuel. As the pilot injection timing is retarded to 15deg of BTDC that is closed by the top dead center, the dissimilarities of diesel and Blending Fuels combustion pressure are reduced. It was found that the pilot injection enhanced the deteriorated spray and combustion characteristics of biodiesel Fuel caused by different physical properties of the Fuel.
Hyun Kyu Suh - One of the best experts on this subject based on the ideXlab platform.
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Spray and Combustion Characteristics of Biodiesel∕Diesel Blended Fuel in a Direct Injection Common-Rail Diesel Engine
Journal of Engineering for Gas Turbines and Power, 2008Co-Authors: Hyun Kyu Suh, Hyun Gu Roh, Chang Sik LeeAbstract:The aim of this work is to investigate the effect of the Blending ratio and pilot injection on the spray and combustion characteristics of biodiesel Fuel and compare these factors with those of diesel Fuel in a direct injection common-rail diesel engine. In order to study the factors influencing the spray and combustion characteristics of biodiesel Fuel, experiments involving exhaust emissions and engine performance were conducted at various biodiesel Blending ratios and injection conditions for engine operating conditions. The macroscopic and microscopic spray characteristics of biodiesel Fuel, such as injection rate, split injection effect, spray tip penetration, droplet diameter, and axial velocity distribution, were compared with the results from conventional diesel Fuel. For biodiesel blended Fuel, it was revealed that a higher injection pressure is needed to achieve the same injection rate at a higher Blending ratio. The spray tip penetration of biodiesel Fuel was similar to that of diesel. The atomization characteristics of biodiesel show that it has higher Sauter mean diameter and lower spray velocity than conventional diesel Fuel due to high viscosity and surface tension. The peak combustion pressures of diesel and Blending Fuel increased with advanced injection timing and the combustion pressure of biodiesel Fuel is higher than that of diesel Fuel. As the pilot injection timing is retarded to 15deg of BTDC that is closed by the top dead center, the dissimilarities of diesel and Blending Fuels combustion pressure are reduced. It was found that the pilot injection enhanced the deteriorated spray and combustion characteristics of biodiesel Fuel caused by different physical properties of the Fuel.
Hyun Gu Roh - One of the best experts on this subject based on the ideXlab platform.
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Spray and Combustion Characteristics of Biodiesel∕Diesel Blended Fuel in a Direct Injection Common-Rail Diesel Engine
Journal of Engineering for Gas Turbines and Power, 2008Co-Authors: Hyun Kyu Suh, Hyun Gu Roh, Chang Sik LeeAbstract:The aim of this work is to investigate the effect of the Blending ratio and pilot injection on the spray and combustion characteristics of biodiesel Fuel and compare these factors with those of diesel Fuel in a direct injection common-rail diesel engine. In order to study the factors influencing the spray and combustion characteristics of biodiesel Fuel, experiments involving exhaust emissions and engine performance were conducted at various biodiesel Blending ratios and injection conditions for engine operating conditions. The macroscopic and microscopic spray characteristics of biodiesel Fuel, such as injection rate, split injection effect, spray tip penetration, droplet diameter, and axial velocity distribution, were compared with the results from conventional diesel Fuel. For biodiesel blended Fuel, it was revealed that a higher injection pressure is needed to achieve the same injection rate at a higher Blending ratio. The spray tip penetration of biodiesel Fuel was similar to that of diesel. The atomization characteristics of biodiesel show that it has higher Sauter mean diameter and lower spray velocity than conventional diesel Fuel due to high viscosity and surface tension. The peak combustion pressures of diesel and Blending Fuel increased with advanced injection timing and the combustion pressure of biodiesel Fuel is higher than that of diesel Fuel. As the pilot injection timing is retarded to 15deg of BTDC that is closed by the top dead center, the dissimilarities of diesel and Blending Fuels combustion pressure are reduced. It was found that the pilot injection enhanced the deteriorated spray and combustion characteristics of biodiesel Fuel caused by different physical properties of the Fuel.
Seangwook Lee - One of the best experts on this subject based on the ideXlab platform.
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An Experimental Study on the Combustion an Emission Characteristics with Injection Pressure of Biodiesel-Ethanol Blending Fuel in CVC
2010Co-Authors: Dongseop Eom, Kyoung-gyun Park, Yoon-hee Dong, Seangwook LeeAbstract:Ethanol has properties of a lower setting point, higher oxygen contents, lower cetane numbers, and also higher volatility compared to biodiesel. Thus, biodiesel Fuel can be improved in the fluidity of Blending Fuel and exhaust emissions by blended ethanol Fuel. This research aims to understand combustion characteristics of biodiesel-ethanol Blending Fuel inside a constant volume chamber. High speed camera was applied to visualize the physics of development of combustion processes, and combustion pressure and exhaust emissions were measured at several Blending ratios of ethanol and biodiesel Fuel. This information may contribute to improve the performance of biodiesel engine and reduce emissions in future.
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spray and combustion characteristics of biodiesel ethanol Blending Fuel
Transactions of the Korean Society of Automotive Engineers, 2009Co-Authors: Dongseop Eom, Yeonsoo Choi, Yongseok Choi, Seangwook LeeAbstract:Ethanol has properties of a lower setting point, higher oxygen contents, lower cetane numbers, and also higher volatility compared to biodiesel. Thus, biodiesel Fuel can be improved in the fluidity of and exhaust emissions by blended ethanol Fuel. This research aims to understand combustion characteristics of biodiesel-ethanol Blending Fuel inside a constant volume chamber by obtaining some fundamental data in order to improve combustion atmosphere. To understand the physics of combustion, high speed camera was applied to visualize the development of combustion processes, and combustion pressure and exhaust emission were measured at several Blending ratios of ethanol and biodiesel Fuel. This information may contribute to improve the performance of biodiesel engine and reduce emissions in future.
Gang Wang - One of the best experts on this subject based on the ideXlab platform.
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Effects of various co-solvents on the solubility between blends of soybean oil with either methanol or ethanol
Fuel, 2019Co-Authors: Xiyuan Zhang, Zhenlong Geng, Xintong Pang, Xichang Wang, Jing Ji, Gang WangAbstract:Abstract To use the blends of low-carbon alcohols (methanol/ethanol) and soybean oil, a co-solvent seems to be necessary because of the unideal inter-solubility in the binary blends. There is only a few study works on the Blending properties of soybean oil and ethanol with n-butanol as a co-solvent. In fact, more co-solvents should be investigated in order to use the Blending Fuel of soybean oil and low carbon alcohols. Therefore, in the current work, the co-solvents of butanol and its isomers together with polyoxymethylene dimethyl ethers (PODE) and tetrahydrofuran (THF) were used to investigate the effects of co-solvents on the inter-solubility between soybean oil and methanol/ethanol at ambient temperatures of 20 °C, 40 °C and 60 °C. Results show that all of tested co-solvents have the capacity to maintain stable one-phase in the binary systems of methanol/soybean-oil and ethanol/soybean-oil. For butanol isomers, n-butanol is a better co-solvent than that of 2-butanol and iso-butanol. PODE has better solubilization than that of butanol, while THF has the best solubilization in all test co-solvents. With the increase of ambient temperature, the additive amount of all kinds of co-solvents has a significant decrease, especially for the ethanol ternary system. The ternary system with ethanol has better inter-solubility than that of methanol system as using the same co-solvent. By adding methanol/ethanol and co-solvents into soybean oil, the viscosity of Blending Fuel is reduced and can match the conventional diesel Fuel. Meantime, the higher density of PODE and THF has potential to improve engine performance. Finally, it can be concluded that both PODE and THF has better solubilization and Fuel properties in the blends of methanol/ethanol and soybean oil.