检索结果-内蒙古大学图书馆

Experimental research on absorption characteristics of CO2, SO2 and NOx in compound solution of MDEA and DMSO

Kung Cheng Je Wu Li Hsueh Pao/Journal of engineering Thermophysics 2016年第1期37卷 116-119页

作者： Li, Lian Hu, Bin Li, Na Zhou, Qu-Lan State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an710049 China North China Power Engineering CO. LTD of China Power Engineering Consulting Group Beijing100120 China

Compound solution of N-methyl-diethanolamine and dimethyl sulfoxide were selected to remove CO2, SO2 and NOx simultaneously in an experimental systems of micro bubbling bed. With suitable absorbent formula, the influence of gas flow rate, reaction temperature and solution pH value were discussed on the removal rate of CO2, SO2 and NOx 200 mL compound solution acted the best with a temperature of 40℃ and a gas flow rate of 1 L/min. The solution pH value dropped in the reaction and higher initial value of pH brought stronger absorption ability. © 2016, Science Press. All right reserved.

关键词： flow of gases

来源：评论

学校读者我要写书评

暂无评论

Origin of Granular Capillarity Revealed by Particle-Based Simulations

引用

Physical Review Letters 2017年第21期118卷 218001-218001页

作者： Fengxian Fan Eric J. R. Parteli Thorsten Pöschel Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering University of Shanghai for Science and Technology Jun Gong Road 516 200093 Shanghai China Institute for Multiscale Simulation Friedrich-Alexander-Universität Erlangen-Nürnberg Nägelsbachstraße 49b 91052 Erlangen Germany Department of Geosciences University of Cologne Pohligstraße 3 50969 Cologne Germany

When a thin tube is dipped into water, the water will ascend to a certain height, against the action of gravity. While this effect, termed capillarity, is well known, recent experiments have shown that agitated granular matter reveals a similar behavior. Namely, when a vertical tube is inserted into a container filled with granular material and is then set into vertical vibration, the particles rise up along the tube. In the present Letter, we investigate the effect of granular capillarity by means of numerical simulations and show that the effect is caused by convection of the granular material in the container. Moreover, we identify two regimes of behavior for the capillary height Hc∞ depending on the tube-to-particle-diameter ratio, D/d. For large D/d, a scaling of Hc∞ with the inverse of the tube diameter, which is reminiscent of liquids, is observed. However, when D/d decreases down to values smaller than a few particle sizes, a uniquely granular behavior is observed where Hc∞ increases linearly with the tube diameter.

关键词： Classical mechanics Complex systems Wetting Dry granular materials

来源：评论

学校读者我要写书评

暂无评论

The effects of Na+ and Cl-ions on the oil-water interface: a molecular dynamics study

The effects of Na+ and Cl-ions on the oil-water interface: a...

引用

2016年大连国际微纳流体和微流控芯片大会(2016 International Conference of Microfluidics, Nanofluidics and Lab-On-A-Chip

作者： Boyao Wen Chengzhen Sun Bofeng Bai State Key Laboratory of Multiphase Flow in Power Engineering Xi''an Jiaotong UniversityXi ''an Shaanxi 710049 China

Ions at the oil-water interface is a ubiquitous phenomenon which plays a important role in many industrial processes, such as extraction separation, nanoparticle assembly, enhanced oil recovery, *** the petroleum industry, due to the long-term interaction with solids and crude oil, the water including formation water, injection water and aqueous solution dissolves lots of ions, such as Na+, K+, Ca2+, Mg2+, Cl-, SO42-, *** migration of charged ions in the bulk phase or interface between oil and water has a significant influence on the molecudar packing of active species at the interface, zeta potential of oil droplets and microstructure and strength of interfacial film by changing the interfacial tension, interface viscosity and electrical repulsion of charged ganglia, thus affecting the stability of crude oil emulsions and the oil displacement in porous ***, more detailed knowledge of how ions affect the properties of oil-water interface is required.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Towards efficient solar-to-hydrogen conversion: Fundamentals and recent progress in copper-based chalcogenide photocathodes

引用

Nanophotonics 2016年第4期5卷 468-491页

作者： Chen, Yubin Feng, Xiaoyang Liu, Maochang Su, Jinzhan Shen, Shaohua International Research Center for Renewable Energy State Key Laboratory of Multiphase Flow in Power Engineering Xi'An Jiaotong University Shaanxi710049 China

Photoelectrochemical (PEC) water splitting for hydrogen generation has been considered as a promising route to convert and store solar energy into chemical fuels. In terms of its large-scale application, seeking semiconductor photoelectrodes with high efficiency and good stability should be essential. Although an enormous number of materials have been explored for solar water splitting in the last several decades, challenges still remain for the practical application. P-type copper-based chalcogenides, such as Cu(In, Ga)Se2 and Cu2ZnSnS4, have shown impressive performance in photovoltaics due to narrow bandgaps, high absorption coefficients, and good carrier transport properties. The obtained high efficiencies in photovoltaics have promoted the utilization of these materials into the field of PEC water splitting. A comprehensive review on copper-based chalcogenides for solar-to-hydrogen conversion would help advance the research in this expanding area. This review will cover the physicochemical properties of copper-based chalco-genides, developments of various photocathodes, strategies to enhance the PEC activity and stability, introductions of tandem PEC cells, and finally, prospects on their potential for the practical solar-to-hydrogen conversion. We believe this review article can provide some insights of fundamentals and applications of copper-based chalco-genide thin films for PEC water splitting. © 2016 Y. Chen et al.

关键词： Photocathodes

来源：评论

学校读者我要写书评

暂无评论

Research on droplets growth of Marangoni condensation during the time-series process

引用

Journal of Physics: Conference Series 2017年第1期925卷

作者： Y Li J Wang K Xia N Chen J Yan State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'lan 710049 P.R. China

In this paper, the condensate droplets growth of Marangoni condensation during the time-series process was experimentally studied. The photographs taken in the experiments were handled by image processing method. The droplets coverage ratio was introduced to analyse the growth process. As the time-series process went on, the condensate droplets coverage ratio increased fast at first, and then increased slowly until reaching a stable state. The droplets coverage ratio increased with the increase in the vapor-to-surface temperature difference and decreased with the increase in the ethanol vapor concentration.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Simulation and experimental study of phase isolation induced by a static cyclone device in a vertical upward pipe

引用

International Journal of Energy for a Clean Environment 2015年第1-4期16卷 139-156页

作者： Wang, Shuai Wang, Dong Niu, Pengman Zhang, Xingkai State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an710049 China

The study puts forward a forced way to realize phase isolation by using a static cyclone device and provides a basis for a systematic study of the phase-isolation phenomenon for an oil-water two-phase flow in a vertical upward pipe. An optimized style of the static cyclone device was chosen to simulate the phase-isolation characteristics that are influenced by various flow parameters (density, viscosity, velocity, oil diameter, etc.). It is observed that the phase-isolation characteristics are well approaching the ideal condition with the oil superficial velocity below 0.20 m/s and water superficial velocity between 0.25 and 0.8 m/s. The experimental results, which agree well with the simulation, also show that the static cyclone device can successfully be used to realize phase isolation. The phase-isolation method may provide an innovative approach to the measurement of phase holdup, the process of water reinjection, and the heat and mass transfer rates of a multiphase flow. © 2015 by Begell House, Inc.

关键词： Two phase flow

来源：评论

学校读者我要写书评

暂无评论

Experimental Research on Macroscopic and Microscopic Characteristics of Ethanol-Fatty Acid Methyl Ester Blends Sprays 1

引用

2016中国汽车工程学会年会暨展览会

作者： Li Junge Yu Xiaocao Liu Bin Hu Tiegang Wang Xibin Powertrain Engineering R&D Center Changan automobile Co.Ltd State Key Laboratory of Multiphase Flows in Power Engineering Xi'an Jiaotong University

ISBN: (数字)9789811035272

ISBN: (纸本)9789811035265;9789811098963

Spray characteristics of Ethanol- Fatty Acid Methyl Ester Blends under common- rail injection condition were experimental investigated,by the high speed photography and particle/droplet image analyses(PDIA).The results show that spray cone angle and project area is increased with the increase of ethanol percentage and ambient *** mean diameter(SMD) increases with the increased axial distance at the same radial *** sharply decreases with the increased injection pressure,the average amplitude is 2μ*** of FAME decreases about 3μm after mixing *** characteristics of Ethanol-Fatty Acid Methyl Ester Blends and diesel are similar,thus the engine is rarely modified while fueled with FAME/Ethanol blends.

关键词： fatty acid methyl ester ethanol particle/droplet image analyses spray characteristics

来源：评论

学校读者我要写书评

暂无评论

Lattice Boltzmann simulation of the deformation and breakup of a droplet impinging on a circular cylinder

Lattice Boltzmann simulation of the deformation and breakup ...

引用

第二届全球华人水动学学术会议

作者： Fan Yang Yuhang Fu Wanyu Chen Yonghua Yan Xueyan Guo Ren Dai School of Energy and Power Engineering University of Shanghai for Science and Technology Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering

The deformation and breakup behavior of a 2D droplet impinging on a solid cylinder was presented by using a multicomponent lattice Boltzmann method（LBM） with pseudopotential *** impact of Bond number（Bo）,surface wettability and the size of the cylinder on the behavior of the droplet were taken into *** show that the behaviors of the droplet can be classified into three types:1) staying on the top of the cylinder;2) breaking up into two daughter droplets and merging again;3)breaking up without the merging *** critical-Bond numbers(Bo and Bo) are defined to classify the three *** is found that Bo increases with the increase of contact angle,while Bo does the *** the size of the cylinder was increased,Bo increases respectively;however,Bo doesn't show such relation with the cylinder *** also shows that it is an effective way to control the evolution of the droplet by setting the wettability of the cylinder surface properly.

关键词： Multicomponent lattice Boltzmann method deformation and breakup of droplet wettability critical Bond number

来源：评论

学校读者我要写书评

暂无评论

First principles investigation of quantum emission from hBN defects

arXiv

引用

arXiv 2017年

作者： Tawfik, Sherif Abdulkader Ali, Sajid Fronzi, Marco Kianinia, Mehran Tran, Toan Trong Stampfl, Catherine Aharonovich, Igor Toth, Milos Ford, Michael J. School of Mathematical and Physical Sciences University of Technology Sydney UltimoNSW2007 Australia Department of Physics GC University Faisalabad Allama Iqbal Road Faisalabad38000 Pakistan International Research Centre for Renewable Energy State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an Shaanxi710049 China School of Physics University of Sydney NSW2006 Australia

Hexagonal boron nitride (hBN) has recently emerged as a fascinating platform for room-temperature quantum photonics due to the discovery of robust visible light single-photon emitters. In order to utilize these emitters, it is necessary to have a clear understanding of their atomic structure and the associated excitation processes that give rise to this single photon emission. Here we perform density-functional theory (DFT) and constrained DFT calculations for a range of hBN point defects in order to identify potential emission candidates. By applying a number of criteria on the electronic structure of the ground state and the atomic structure of the excited states of the considered defects, and then calculating the Huang-Rhys (HR) factor, we find that the CBVN defect, in which a carbon atom substitutes a boron atom and the opposite nitrogen atom is removed, is a potential emission source with a HR factor of 1.66, in good agreement with the experimental HR factor. We calculate the photoluminescence (PL) line shape for this defect and find that it reproduces a number of key features in the the experimental PL lineshape. Copyright © 2017, The Authors. All rights reserved.

关键词： III-V semiconductors

来源：评论

学校读者我要写书评

暂无评论

Characterization of Soot Based on Variable Laser-induced Spectroscopy

Characterization of Soot Based on Variable Laser-induced Spe...

引用

Progress in Electromagnetic Research Symposium

作者： Yanfeng Zhang Jun Chen Huinan Yang Mingxu Su Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering School of Energy and Power Engineering University of Shanghai for Science and Technology

ISBN: (纸本)9781509060948

Laser-induced incandescence (LII) is a non-intrusive method of measuring time-resolved soot particle volume fraction and primary particle sizes. We also can know the component by increasing the laser energy to the regime of laser-induced breakdown spectroscopy (LIBS). More model analysis and experiments should be studied to understand the LII/LIBS.

关键词： Soot laser-induced breakdown spectroscopy LASER ENERGY Pattern analysis Filament lamps primary particulates laser-induced

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：