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Performance, emission and combustion characteristics of CI engine fuelled with diesel and hydrogen

R. Senthil KUMAR,M. LOGANATHAN,E. James GUNASEKARAN

Frontiers in Energy 2015, Volume 9, Issue 4,   Pages 486-494 doi: 10.1007/s11708-015-0368-4

Abstract: Hydrogen (H ) is being considered as a primary automotive fuel and as a replacement for conventional fuels. Some of the desirable properties, like high flame velocity, high calorific value motivate us to use hydrogen fuel as a dual fuel mode in diesel engine. In this experiment, hydrogen was inducted in the inlet manifold with intake air. The experiments were conducted on a four stroke, single cylinder, water cooled, direct injection (DI), diesel engine at a speed of 1500 r/min. Hydrogen was stored in a high pressure cylinder and supplied to the inlet manifold through a water-and-air-based flame arrestor. A pressure regulator was used to reduce the cylinder pressure from 140 bar to 2 bar. The hydrogen was inducted with a volume flow rate of 4l pm, 6l pm and 8l pm, respectively by a digital volume flow meter. The engine performance, emission and combustion parameters were analyzed at various flow rates of hydrogen and compared with diesel fuel operation. The brake thermal efficiency (BTE) was increased and brake specific fuel consumption (BSFC) decreased for the hydrogen flow rate of 8l pm as compared to the diesel and lower volume flow rates of hydrogen. The hydrocarbon (HC) and carbon monoxide (CO) were decreased and the oxides of nitrogen (NO ) increased for higher volume flow rates of hydrogen compared to diesel and lower volume flow rates of hydrogen. The heat release rate and cylinder pressure was increased for higher volume flow rates of hydrogen compared to diesel and lower volume flow rates of hydrogen.

Keywords： hydrogen     brake thermal efficiency     crank angle     compressed ignition (CI)    

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Reliability analysis of kinematic accuracy for the elastic slider-crank mechanism

TUO Yaofei, CHEN Jianjun, ZHANG Chijiang, CHEN Yongqin

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 2,   Pages 214-217 doi: 10.1007/s11465-007-0037-3

Abstract: This paper deals with the static and dynamic output kinematic accuracy of a group of elastic slider-crankThe results obtained reveal the following facts: with the increase of the crank s rotating speed, the

Keywords： output kinematic     group     slider-crank     kinematic accuracy     displacement    

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Precise semi-analytical inverse kinematic solution for 7-DOF offset manipulator with arm angle optimization

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 3,   Pages 435-450 doi: 10.1007/s11465-021-0630-x

Abstract: However, finding the analytical solution of an EMM on the basis of arm angle parameterization is difficultFirstly, the analytical inverse kinematic solution is established based on joint angle parameterizationerror is corrected using a numerical method through the analytical inverse solution based on joint angleLastly, case solutions confirm that this method has high precision, and the arm angle parameterizationmethod is superior to the joint angle parameterization method in terms of parameter selection.

Keywords： 7-DOF redundant manipulator     inverse kinematics     semi-analytical     arm angle     link offset    

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Evaluating the material strength from fracture angle under uniaxial loading

Jitang FAN

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 2,   Pages 288-293 doi: 10.1007/s11709-018-0480-8

Abstract: Shearing fracture angle is smaller than 45° under uniaxial compression and greater than 45° under uniaxialmaterial strength under uniaxial compression and tension is developed by correlating the shearing fracture angleis quantitatively illustrated by a function for analyzing the material strength from shear fracture angle

Keywords： strength     fracture     mechanics    

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Computation of the protein molecular mechanism using adaptive dihedral angle increments

Mikel DIEZ, Victor PETUYA, Mónica URIZAR, Erik MACHO, Oscar ALTUZARRRA

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 1,   Pages 104-108 doi: 10.1007/s11465-013-0360-9

Abstract:

Protein motion simulation is still a troublesome problem yet to be solved, especially due to its high computational requirements. The procedure presented in this paper makes use of the proteins’ real degrees of freedom (DOFs). The procedure makes no use of any intermediate energy minimization processes that may alter the motion path or result in very high computational cost requirements. In order to reduce the computational cost, presented algorithms make use of the balls and rods approach for protein structure modelization. Also, structures are normalized in order to minimize inaccuracies introduced by experimental methods, providing a more efficient but still accurate structure for motion simulation.

Keywords： kinematics     serial robot     proteins     folding     molecular mechanism    

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CFD simulation on shell-and-tube heat exchangers with small-angle helical baffles

Minhua ZHANG,Fang MENG,Zhongfeng GENG

Frontiers of Chemical Science and Engineering 2015, Volume 9, Issue 2,   Pages 183-193 doi: 10.1007/s11705-015-1510-x

Abstract: This paper focused on the small-angle helical baffles that have been merely reported in open literatureThese baffles are noncontinuous helical baffles with a helix angle of 10° to 30°, and their shapes are

Keywords： heat transfer     pressure drop     helical baffle     CFD    

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Effects of Boundary Condition and Helix Angle on Meshing Performance of TI Worm Gearing

SUN Yue-hai, DUAN Lu-qian, WANG Shu-ren, ZHANG Ce

Frontiers of Mechanical Engineering 2006, Volume 1, Issue 1,   Pages 90-95 doi: 10.1007/s11465-005-0006-7

Abstract: (TI) worm gearing, the authors introduced boundary condition into contact line analysis.With helix angleIf the helix angle is equal to or slightly smaller than the bigger angle, which makes two meshing boundary

Keywords： preferable     inexistence     Results     validity     boundary condition    

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Industrial-scale investigations on effects of tertiary-air declination angle on combustion and steam

Xiaoguang LI, Lingyan ZENG, Hongye LIU, Yao LI, Yifu LI, Yunlong ZHAO, Bo JIAO, Minhang SONG, Shaofeng ZHANG, Zhichao CHEN, Zhengqi LI

Frontiers in Energy 2021, Volume 15, Issue 1,   Pages 132-142 doi: 10.1007/s11708-020-0803-z

Abstract: Industrial-scale experiments were conducted to study the effects of tertiary air declination angle (TDA

Keywords： supercritical down-fired boiler     industrial-scale experiment     tertiary air declination angle     coal combustion    

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A Miniature Meta-Optical System for Reconfigurable Wide-Angle Imaging and Polarization-Spectral Detection

Fei Zhang,Minghao Liao,Mingbo Pu,Yinghui Guo,Lianwei Chen,Xiong Li,Qiong He,Tongtong Kang,Xiaoliang Ma,Yuan Ke,Xiangang Luo,

Engineering doi: 10.1016/j.eng.2023.07.008

Abstract: Wide-angle imaging and spectral detection play vital roles in tasks such as target tracking, object classificationAs a proof-of-concept demonstration, the simultaneous implementation of wide-angle imaging and polarization-spectral

Keywords： Metasurfaces     Reconfigurable     Imaging     Spectral    

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Micro-angle tilt detection for the rotor of a novel rotational gyroscopewith a 0.47’’ resolution Article

Hai LI, Xiao-wei LIU, Rui WENG, Hai-feng ZHANG

Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 5,   Pages 591-598 doi: 10.1631/FITEE.1500454

Abstract: displacement measurement of the proof mass of vibratory gyroscopes, but it did not achieve high resolutions in angleIn this paper, a differential capacitive detection structure is presented to measure the tilt angle ofRate table test results of the gyroscope show that the smallest resolvable tilt angle of the rotor isless than 0.47’’ (0.00013 ), and the nonlinearity of the angle detection structure is 0.33%, which can

Keywords： Micro-angle detection     Differential capacitive structure     Rotational gyroscope     Structure optimization    

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Effect of placement angles on wireless electrocoagulation for bipolar aluminum electrodes

Zhenlian Qi, Jinna Zhang, Shijie You

Frontiers of Environmental Science & Engineering 2018, Volume 12, Issue 3, doi: 10.1007/s11783-018-1034-y

Abstract: In this study, the impact of placement angle of bipolar aluminum electrode on WEC was investigated toprovide a detailed analysis on the correlations between the bipolar electrode placement angle and bipolar

Keywords： Bipolar electrochemistry     Wireless electrocoagulation     Placement angle    

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Synthesis and properties of polybenzazoles containing flexible methylene in backbone

XU Xiaohui, LIU Xiaoyun, ZHOU Chengjun, ZHUANG Qixin, HAN Zhewen

Frontiers of Chemical Science and Engineering 2008, Volume 2, Issue 4,   Pages 412-416 doi: 10.1007/s11705-008-0073-5

Abstract: The structures of polybenzazoles were characterized by means of FT-IR, H NMR and Wide-angle X-ray diffraction

Keywords： condensation     Wide-angle     absorption     excellent     diffraction    

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Effect of UAV prewetting application during the flowering period of cotton on pesticide droplet deposition

Weixiang YAO, Xianju WANG, Yubin LAN, Ji JIN

Frontiers of Agricultural Science and Engineering 2018, Volume 5, Issue 4,   Pages 455-461 doi: 10.15302/J-FASE-2018232

Abstract:

Prewetting process can reduce the contact angle between the droplet and the leaf blade, so that theCotton leaves in 0°–30°, 30°–60°, 60°–90° leaf blade angleranges (angle between the leaf blade and the horizontal plane) were examined.It was also found that the mean droplet deposition quantity in each leaf blade angle range increasedFor the leaf blade angle range 60° to 90°, this increase was the most pronounced, with 0.043,

Keywords： aerial spray     cotton     deposition     flowering period     leaf angle     prewetting     UAV    

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Seasonal variations in leaf capturing of particulate matter, surface wettability and micromorphology in urban tree species

Huixia WANG, Hui SHI, Yangyang LI, Ya YU, Jun ZHANG

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 4,   Pages 579-588 doi: 10.1007/s11783-013-0524-1

Abstract: remained non-wettable or highly non-wettable throughout the growing season; the decrease in the contact angle

Keywords： contact angle     particulate matter     retention amount    

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Lamp With Uniform Illuminance Within Large Angle Area

Gu Wei,Lei Wei,Zhang Xiaobing,Yang Guodong,Wu Yongqiang,Fang Qinghua

Strategic Study of CAE 2007, Volume 9, Issue 3,   Pages 71-75

Abstract: object by lamp in the dark environment, the lamp should produce a uniform illuminance in a large view angleThe warp within 90° view angle is ±15% after design compared with 65% before design.

Keywords： uniform illuminance     lamp     mirror    

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Title Author Date Type Operation

Performance, emission and combustion characteristics of CI engine fuelled with diesel and hydrogen

R. Senthil KUMAR,M. LOGANATHAN,E. James GUNASEKARAN

Journal Article

Reliability analysis of kinematic accuracy for the elastic slider-crank mechanism

TUO Yaofei, CHEN Jianjun, ZHANG Chijiang, CHEN Yongqin

Journal Article

Precise semi-analytical inverse kinematic solution for 7-DOF offset manipulator with arm angle optimization

Journal Article

Evaluating the material strength from fracture angle under uniaxial loading

Jitang FAN

Journal Article

Computation of the protein molecular mechanism using adaptive dihedral angle increments

Mikel DIEZ, Victor PETUYA, Mónica URIZAR, Erik MACHO, Oscar ALTUZARRRA

Journal Article

CFD simulation on shell-and-tube heat exchangers with small-angle helical baffles

Minhua ZHANG,Fang MENG,Zhongfeng GENG

Journal Article

Effects of Boundary Condition and Helix Angle on Meshing Performance of TI Worm Gearing

SUN Yue-hai, DUAN Lu-qian, WANG Shu-ren, ZHANG Ce

Journal Article

Industrial-scale investigations on effects of tertiary-air declination angle on combustion and steam

Xiaoguang LI, Lingyan ZENG, Hongye LIU, Yao LI, Yifu LI, Yunlong ZHAO, Bo JIAO, Minhang SONG, Shaofeng ZHANG, Zhichao CHEN, Zhengqi LI

Journal Article

A Miniature Meta-Optical System for Reconfigurable Wide-Angle Imaging and Polarization-Spectral Detection

Fei Zhang,Minghao Liao,Mingbo Pu,Yinghui Guo,Lianwei Chen,Xiong Li,Qiong He,Tongtong Kang,Xiaoliang Ma,Yuan Ke,Xiangang Luo,

Journal Article

Micro-angle tilt detection for the rotor of a novel rotational gyroscopewith a 0.47’’ resolution

Hai LI, Xiao-wei LIU, Rui WENG, Hai-feng ZHANG

Journal Article

Effect of placement angles on wireless electrocoagulation for bipolar aluminum electrodes

Zhenlian Qi, Jinna Zhang, Shijie You

Journal Article

Synthesis and properties of polybenzazoles containing flexible methylene in backbone

XU Xiaohui, LIU Xiaoyun, ZHOU Chengjun, ZHUANG Qixin, HAN Zhewen

Journal Article

Effect of UAV prewetting application during the flowering period of cotton on pesticide droplet deposition

Weixiang YAO, Xianju WANG, Yubin LAN, Ji JIN

Journal Article

Seasonal variations in leaf capturing of particulate matter, surface wettability and micromorphology in urban tree species

Huixia WANG, Hui SHI, Yangyang LI, Ya YU, Jun ZHANG

Journal Article

Lamp With Uniform Illuminance Within Large Angle Area

Gu Wei,Lei Wei,Zhang Xiaobing,Yang Guodong,Wu Yongqiang,Fang Qinghua

Journal Article