The Experts below are selected from a list of 191316 Experts worldwide ranked by ideXlab platform
Hongsheng Zhang - One of the best experts on this subject based on the ideXlab platform.
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Experimental investigation on wall film ratio of diesel, butanol/diesel, DME/diesel and gasoline/diesel blended fuels during the spray wall Impingement process
Fuel Processing Technology, 2017Co-Authors: Hanzhengnan Yu, Xingyu Liang, Xiuxiu Sun, Gequn Shu, Hongsheng ZhangAbstract:Spray wall Impingement in the early injection period has been proved be unavoidable in the diesel engine using early injection strategy. The formation of wall film directly affects fuel/air mixture formation, combustion, exhaust emissions and oil quality. In this study, experiments were carried out to investigate the wall film ratio of pure diesel, butanol/diesel, DME (Di Methyl Ether)/diesel and gasoline/diesel blended fuels. The variations of wall film ratio with different injection pressures, Impingement distances, Impingement angles and blending ratios were compared under both dry wall and wet wall conditions. For both dry wall and wet wall conditions, with increasing injection pressure and blending ratio, wall film ratio decreased, which is the opposite trend to Impingement distance and Impingement angle variations. Some dimensionless numbers also have been introduced in order to evaluate the effect of each impact factor on the variation of wall film ratio. Results showed that Impingement momentum is the major impact factor on wall film ratio when varying the injection pressure or Impingement distance. Impingement flow mass is the major impact factor when varying the Impingement angle. For different blending ratios, the wall film ratio is mainly influenced by surface tension, followed by viscosity and saturated vapor pressure. In addition, the equations between the wall film ratio and Weber number of the Impingement droplet were derived for each test fuel.
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Experimental investigation on wall film distribution of dimethyl ether/diesel blended fuels formed during spray wall Impingement
Energies, 2016Co-Authors: Hanzhengnan Yu, Yuesen Wang, Xingyu Liang, Gequn Shu, Xu Wang, Hongsheng ZhangAbstract:© 2016 by the authors; licensee MDPI. Dimethyl ether (DME)/diesel blended fuels are used to improve the emissions caused by spray wall Impingement during the early injection period. However, experimental results have showed that the spray wall Impingement still cannot be avoided due to the engine structure and low density of the in-cylinder charge at the early injection timing. Furthermore, the wall film formed in the spray wall Impingement process directly affects fuel/air mixture formation, combustion, exhaust emissions and oil quality subsequently. In this paper, the wall film distribution of DME/diesel blended fuels formed during the spray wall Impingement process has been experimentally investigated. The variations of wall film distribution, wall film area and average thickness with different injection pressures, Impingement distances, Impingement angles and blending ratios have been discussed under both dry wall and wet wall conditions. Results showed that the wall film distribution styles were mainly determined by the spray Impingement momentum. The variation of the wall film area and average thickness were affected by three factors including the Impingement momentum, wall film mass and fuel properties. Correlation analysis was introduced in order to evaluate the effect of each impact factor on the variation of wall film area and average thickness.
Hanzhengnan Yu - One of the best experts on this subject based on the ideXlab platform.
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Experimental investigation on wall film ratio of diesel, butanol/diesel, DME/diesel and gasoline/diesel blended fuels during the spray wall Impingement process
Fuel Processing Technology, 2017Co-Authors: Hanzhengnan Yu, Xingyu Liang, Xiuxiu Sun, Gequn Shu, Hongsheng ZhangAbstract:Spray wall Impingement in the early injection period has been proved be unavoidable in the diesel engine using early injection strategy. The formation of wall film directly affects fuel/air mixture formation, combustion, exhaust emissions and oil quality. In this study, experiments were carried out to investigate the wall film ratio of pure diesel, butanol/diesel, DME (Di Methyl Ether)/diesel and gasoline/diesel blended fuels. The variations of wall film ratio with different injection pressures, Impingement distances, Impingement angles and blending ratios were compared under both dry wall and wet wall conditions. For both dry wall and wet wall conditions, with increasing injection pressure and blending ratio, wall film ratio decreased, which is the opposite trend to Impingement distance and Impingement angle variations. Some dimensionless numbers also have been introduced in order to evaluate the effect of each impact factor on the variation of wall film ratio. Results showed that Impingement momentum is the major impact factor on wall film ratio when varying the injection pressure or Impingement distance. Impingement flow mass is the major impact factor when varying the Impingement angle. For different blending ratios, the wall film ratio is mainly influenced by surface tension, followed by viscosity and saturated vapor pressure. In addition, the equations between the wall film ratio and Weber number of the Impingement droplet were derived for each test fuel.
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Experimental investigation on wall film distribution of dimethyl ether/diesel blended fuels formed during spray wall Impingement
Energies, 2016Co-Authors: Hanzhengnan Yu, Yuesen Wang, Xingyu Liang, Gequn Shu, Xu Wang, Hongsheng ZhangAbstract:© 2016 by the authors; licensee MDPI. Dimethyl ether (DME)/diesel blended fuels are used to improve the emissions caused by spray wall Impingement during the early injection period. However, experimental results have showed that the spray wall Impingement still cannot be avoided due to the engine structure and low density of the in-cylinder charge at the early injection timing. Furthermore, the wall film formed in the spray wall Impingement process directly affects fuel/air mixture formation, combustion, exhaust emissions and oil quality subsequently. In this paper, the wall film distribution of DME/diesel blended fuels formed during the spray wall Impingement process has been experimentally investigated. The variations of wall film distribution, wall film area and average thickness with different injection pressures, Impingement distances, Impingement angles and blending ratios have been discussed under both dry wall and wet wall conditions. Results showed that the wall film distribution styles were mainly determined by the spray Impingement momentum. The variation of the wall film area and average thickness were affected by three factors including the Impingement momentum, wall film mass and fuel properties. Correlation analysis was introduced in order to evaluate the effect of each impact factor on the variation of wall film area and average thickness.
Gequn Shu - One of the best experts on this subject based on the ideXlab platform.
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Experimental investigation on wall film ratio of diesel, butanol/diesel, DME/diesel and gasoline/diesel blended fuels during the spray wall Impingement process
Fuel Processing Technology, 2017Co-Authors: Hanzhengnan Yu, Xingyu Liang, Xiuxiu Sun, Gequn Shu, Hongsheng ZhangAbstract:Spray wall Impingement in the early injection period has been proved be unavoidable in the diesel engine using early injection strategy. The formation of wall film directly affects fuel/air mixture formation, combustion, exhaust emissions and oil quality. In this study, experiments were carried out to investigate the wall film ratio of pure diesel, butanol/diesel, DME (Di Methyl Ether)/diesel and gasoline/diesel blended fuels. The variations of wall film ratio with different injection pressures, Impingement distances, Impingement angles and blending ratios were compared under both dry wall and wet wall conditions. For both dry wall and wet wall conditions, with increasing injection pressure and blending ratio, wall film ratio decreased, which is the opposite trend to Impingement distance and Impingement angle variations. Some dimensionless numbers also have been introduced in order to evaluate the effect of each impact factor on the variation of wall film ratio. Results showed that Impingement momentum is the major impact factor on wall film ratio when varying the injection pressure or Impingement distance. Impingement flow mass is the major impact factor when varying the Impingement angle. For different blending ratios, the wall film ratio is mainly influenced by surface tension, followed by viscosity and saturated vapor pressure. In addition, the equations between the wall film ratio and Weber number of the Impingement droplet were derived for each test fuel.
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Experimental investigation on wall film distribution of dimethyl ether/diesel blended fuels formed during spray wall Impingement
Energies, 2016Co-Authors: Hanzhengnan Yu, Yuesen Wang, Xingyu Liang, Gequn Shu, Xu Wang, Hongsheng ZhangAbstract:© 2016 by the authors; licensee MDPI. Dimethyl ether (DME)/diesel blended fuels are used to improve the emissions caused by spray wall Impingement during the early injection period. However, experimental results have showed that the spray wall Impingement still cannot be avoided due to the engine structure and low density of the in-cylinder charge at the early injection timing. Furthermore, the wall film formed in the spray wall Impingement process directly affects fuel/air mixture formation, combustion, exhaust emissions and oil quality subsequently. In this paper, the wall film distribution of DME/diesel blended fuels formed during the spray wall Impingement process has been experimentally investigated. The variations of wall film distribution, wall film area and average thickness with different injection pressures, Impingement distances, Impingement angles and blending ratios have been discussed under both dry wall and wet wall conditions. Results showed that the wall film distribution styles were mainly determined by the spray Impingement momentum. The variation of the wall film area and average thickness were affected by three factors including the Impingement momentum, wall film mass and fuel properties. Correlation analysis was introduced in order to evaluate the effect of each impact factor on the variation of wall film area and average thickness.
Xingyu Liang - One of the best experts on this subject based on the ideXlab platform.
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Experimental investigation on wall film ratio of diesel, butanol/diesel, DME/diesel and gasoline/diesel blended fuels during the spray wall Impingement process
Fuel Processing Technology, 2017Co-Authors: Hanzhengnan Yu, Xingyu Liang, Xiuxiu Sun, Gequn Shu, Hongsheng ZhangAbstract:Spray wall Impingement in the early injection period has been proved be unavoidable in the diesel engine using early injection strategy. The formation of wall film directly affects fuel/air mixture formation, combustion, exhaust emissions and oil quality. In this study, experiments were carried out to investigate the wall film ratio of pure diesel, butanol/diesel, DME (Di Methyl Ether)/diesel and gasoline/diesel blended fuels. The variations of wall film ratio with different injection pressures, Impingement distances, Impingement angles and blending ratios were compared under both dry wall and wet wall conditions. For both dry wall and wet wall conditions, with increasing injection pressure and blending ratio, wall film ratio decreased, which is the opposite trend to Impingement distance and Impingement angle variations. Some dimensionless numbers also have been introduced in order to evaluate the effect of each impact factor on the variation of wall film ratio. Results showed that Impingement momentum is the major impact factor on wall film ratio when varying the injection pressure or Impingement distance. Impingement flow mass is the major impact factor when varying the Impingement angle. For different blending ratios, the wall film ratio is mainly influenced by surface tension, followed by viscosity and saturated vapor pressure. In addition, the equations between the wall film ratio and Weber number of the Impingement droplet were derived for each test fuel.
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Experimental investigation on wall film distribution of dimethyl ether/diesel blended fuels formed during spray wall Impingement
Energies, 2016Co-Authors: Hanzhengnan Yu, Yuesen Wang, Xingyu Liang, Gequn Shu, Xu Wang, Hongsheng ZhangAbstract:© 2016 by the authors; licensee MDPI. Dimethyl ether (DME)/diesel blended fuels are used to improve the emissions caused by spray wall Impingement during the early injection period. However, experimental results have showed that the spray wall Impingement still cannot be avoided due to the engine structure and low density of the in-cylinder charge at the early injection timing. Furthermore, the wall film formed in the spray wall Impingement process directly affects fuel/air mixture formation, combustion, exhaust emissions and oil quality subsequently. In this paper, the wall film distribution of DME/diesel blended fuels formed during the spray wall Impingement process has been experimentally investigated. The variations of wall film distribution, wall film area and average thickness with different injection pressures, Impingement distances, Impingement angles and blending ratios have been discussed under both dry wall and wet wall conditions. Results showed that the wall film distribution styles were mainly determined by the spray Impingement momentum. The variation of the wall film area and average thickness were affected by three factors including the Impingement momentum, wall film mass and fuel properties. Correlation analysis was introduced in order to evaluate the effect of each impact factor on the variation of wall film area and average thickness.
Victor M Ilizaliturri - One of the best experts on this subject based on the ideXlab platform.
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complications of arthroscopic femoroacetabular Impingement treatment a review
Clinical Orthopaedics and Related Research, 2009Co-Authors: Victor M IlizaliturriAbstract:Recent developments in hip arthroscopy techniques and technology have made it possible in many cases to avoid open surgical technique for treating pincer-type and cam-type femoroacetabular Impingement and rather treating it arthroscopically. Early reports suggest favorable results using arthroscopic techniques. The frequency of complications reported for hip arthroscopy for all indications is generally less than 1.5%, suggesting the procedure is safe. Little information is available on complications directly related to the arthroscopic treatment of femoroacetabular Impingement. Failure to recognize and treat or incompletely reshape Impingement deformities may be the most frequent cause for a second hip arthroscopy and redebridement of the deformity. There has been no report of avascular necrosis related to the arthroscopic treatment of femoroacetabular Impingement; only one femoral neck fracture after arthroscopic cam remodeling has been reported in a large series of patients. Other clinical concerns include hip dislocation secondary to extensive capsulotomies or overresection of the anterior acetabular rim in the case of pincer Impingement.
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arthroscopic treatment of cam type femoroacetabular Impingement preliminary report at 2 years minimum follow up
Journal of Arthroplasty, 2008Co-Authors: Victor M Ilizaliturri, Liliana Orozcorodriguez, Eduardo Acostarodriguez, Javier CamachogalindoAbstract:Femoroacetabular Impingement is defined as anterior hip abutment between the acetabular rim and proximal femur. When it is secondary to acetabular overcoverage, it is pincer Impingement. When it is secondary to femoral head and neck deformity, it is cam Impingement. Open remodeling of impinging deformities is the standard treatment of this condition. We describe arthroscopic treatment of cam Impingement in 19 patients using standard hip arthroscopy portals by the lateral approach. Sixteen patients improved their symptoms after the procedure; and 3 patients deteriorated, with 1 needing a total hip arthroplasty at 2 years follow-up. We had no cases with postoperative femoral neck fractures or avascular necrosis. Hip arthroscopy can be successfully used to treat cam Impingement. The precautions used in open surgery to preserve femoral neck bone stock and hip vascularity should be followed.
