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Corrigendum to “Virtual experimentation through 3D full-loop simulation of a circulating fluidized bed” [Particuology 6 (2008) 529-539]

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Particuology 2009年第5期7卷 419页

作者： Nan Zhanga,b,Bona Lua,b,Wei Wanga,Jinghai Lia a state key laboratory of multiphase Complex Systems,Institute of Process engineering,Chinese Academy of Sciences,Beijing 100190,China b Graduate University of the Chinese Academy of Sciences,Beijing 100049,China State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 China Graduate University of the Chinese Academy of Sciences Beijing 100049 China

The authors regret that the below errors were present in the above-mentioned article when originally published.

关键词： Virtual experimentation through 3D full-loop simulation of a circulating fluidized bed Corrigendum to Particuology 6

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Experimental study on premixed combustion of dimethyl ether-hydrogen-air mixtures

Experimental study on premixed combustion of dimethyl ether-...

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7th International Conference on Modeling and Diagnostics for Advanced Engine Systems, COMODIA 2008

作者： Chen, Gen Huang, Zuohua Chen, Chaoyang Miao, Haiyan Wang, Xibin Jiang, Deming State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an 710049 China

The premixed flames of DME-hydrogen-air premixed mixture were studied by the outwardly expanding flame and schlieren photography. The influences from equivalence ratio, hydrogen addition and initial pressure on the flame speed and combustion characteristics are analyzed. The results show that the flame speed, the laminar burning velocity and the mass burning rate increase with the increase of hydrogen addition. Increasing the ratio of hydrogen to DME will shorten the combustion duration. In the case of small hydrogen addition, the Markstein length decreases with the increase of equivalence ratio, and this reveals that lean mixture has better flame front stability than of rich mixture. In the case of large hydrogen addition, the Markstein length increases with the increase of equivalence ratio, and this indicates that rich mixture has better flame front stability than that of lean mixture. The initial pressure has larger influence on the combustion pressure than that from hydrogen addition. The flame development duration decreases with the increase of hydrogen addition and/or with the increase of equivalence ratio. Addition of hydrogen into DME can improve the ignitability of the mixtures and fasten the combustion. Copyright © 2008 by the Japan Society of Mechanical Engineers.

关键词： Hydrogen

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Simulation of supercritical water gasification of organic wastes with neural network model

Simulation of supercritical water gasification of organic wa...

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17th World Hydrogen Energy Conference 2008, WHEC 2008

作者： Zhang, Qinming Wang, Shuzhong Chen, Chongming Gong, Yanmeng Xu, Donghai State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an 710049 China

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An experimental study of premixed laminar methane/oxygen/argon flames doped with hydrogen at low pressure with synchrotron photoionization

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Chinese Science Bulletin 2008年第8期53卷 1262-1269页

作者： WANG JinHua HU ErJiana HUANG ZuoHua MA ZhiHao TIAN ZhenYu WANG Jina LI YuYana State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an 710049 China National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei 230029 China

Laminar premixed stoichiometric methane/hydrogen/oxygen/argon flames were investigated with tun- able synchrotron vacuum ultraviolet (VUV) photoionization and molecular-beam sampling mass spec- trometry techniques. The methane/hydrogen fuel blends with hydrogen volumetric fraction of 0, 20%, 40%, 60% and 80% were studied. All observed flame species, including stable intermediates and radi- cals in the flames, were detected by measuring photoionization mass spectra and photoionization effi- ciency (PIE) spectra. Mole fraction profiles of major species and intermediates were derived by scan- ning burner at some selected photon energies near ionization thresholds. The influence of hydrogen addition on mole fraction of major species and intermediates was analyzed. The results show that the major species mole fraction of CO, CO2 and CH4 decreases with the increase of hydrogen fraction. The mole fraction of intermediates measured in this experiment decreases remarkably with the increase of hydrogen fraction. This would be due to the increase of H and OH radicals by hydrogen addition and the high diffusivity and activity of H radical promoting the chemical reaction. In addition, the increase of H/C ratio with the increase of hydrogen fraction also leads to the decrease of the mole fraction of car- bon-related intermediates and contributes to the decrease of unburned and incomplete combustion products.

关键词：甲烷氢混合火焰同步加速器 MBMS

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No new physics in single-phase fluid flow and heat transfer in mini-and micro-channels-is it a conclusion?

No new physics in single-phase fluid flow and heat transfer ...

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1st ASME Micro/Nanoscale Heat Transfer International Conference, MNHT08

作者： Wen-Quan, Tao Gui-Hua, Tang Ya-Ling, He Zhuo, Li State Key Laboratory of Multiphase Flow School of Energy and Power Engineering Xi'an Jiaotong University Xi'an 710049 China

ISBN: (纸本)0791842924

First the flow friction characteristics of nitrogen and helium in stainless steel microtubes, glass microtubes, square glass microchannels, and rectangular silicon microchannels are tested. The data in glass microtubes with diameters from 50 to 201 microns and in square glass channels with characteristic diameters from 52 to 100 microns show that the friction factors are in good agreement with the conventional predictions. The friction factors in stainless-steel tubes with diameters from 119 to 300 microns are much higher than the conventional ones. The results for two of the four silicon microchannels with characteristic diameters from 26-60 microns are in good agreement while those of the other two channels are larger. This discrepancy is resulted from the large relative surface roughness. Smaller friction factors in glass microtubes with diameters from 10 to 20 microns are obtained due to the rarefaction effect. Second the flow friction experimental data for deionized water flow in glass microtubes with diameters from 50 to 530 microns show that friction factors and transition Reynolds numbers are in good agreement with the conventional predictions. However, the friction factors in stainless steel microtubes with diameters from 50-1570 microns are much higher than the conventional predictions. This discrepancy is attributed to the large surface relative roughness or denser roughness distribution. Numerical simulations considering electroviscous effect are carried out. The simulation results show that the electroviscous effect does not play a significant role in the friction factor for channel dimensions of the order of microns though it does affect the velocity profile and hence it could be neglected in engineering applications for channel dimensions of the order of microns. Third the measured local Nusselt number distribution of deionized water along the axial direction of the stainless steel tubes of 373-1570 microns with uniform heat flux do not accord with th

关键词： Glass

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EXPERIMENTAL STUDY ON GAS-LIQUID TWO-PHASE flowS IN AN AREATION TANK BY USING IMAGE TREATMENT METHOD

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Journal of Hydrodynamics 2008年第5期20卷 650-655页

作者： CHENG Wen LIU Wen-hong HU Bao-wei WAN Tian State Key Laboratory of Multiphase Flow in Power Engineering Xi＇an Jiaotong University Xi＇an 710049 China Environment Research Institute Xi＇an University of Technology Xi＇an 710048 China Environment Research Institute Xi＇an University of Technology Xi＇an 710048 China

Particle Image Velocimetry （PIV） technique was employed to study experimentally gas-liquid two-phase flow in an aeration tank. In terms of the PIV principles, an algorithm of PIV based on the Fast Fourier Transformation （FFT） was worked out. The PIV program was developed and verified, and then was used to measure three kinds of states in the testing device. The program was also used to calculate and analyze the related parameters. The experimental data indicate that the bubbles in testing device have the longest resident time and stronger turbulent intensity for the gas-liquid two-phase flow in a special case （Case 3）, resulting in great increase of the oxygen transferring speed and efficiency, whereby providing the basis for the selection design of aeration tank.

关键词： gas-liquid two-phase flow Particle Image Velocimetry （PIV） Fast Fourier Transformation （FFT） aeration tank

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New method of investigating catalyzed combustion characteristics of pulverized coal: referenced DTA

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Ranliao Huaxue Xuebao/Journal of Fuel Chemistry and Technology 2009年第3期37卷 282-288页

作者： Gong, Xu-Zhong Guo, Zhan-Cheng Wang, Zhi State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 China Graduate University of Chinese Academy of Sciences Beijing 100049 China Key Laboratory of Recycling and Ecological Metallurgy University of Science and Technology Beijing Beijing 100083 China

A new method of investigating catalytic combustion characteristics of pulverized coal was introduced using synthetical thermal analyzer, that is, the referenced DTA. Ignition temperatures of anthracite with K2CO3, Fe2O3, CaCO3 and CeO2 addition were 319°C, 410°C, 400°C and 405°C respectively determined by the referenced DTA. The ignition temperatures decreased by catalysts were observed directly from the reference DTA curves. In addition, variations of heat release during pulverized coal combustion were calculated by the referenced DTA curves. The heat releases of anthracite combustion increased by 340.2 J/g, 352.8 J/g, 348.6 J/g and 264.6 J/g, respectively, with K2CO3, Fe2O3, CaCO3 and CeO2 addition. The above results are accordance with those from conventional DTA experiment. However, the referenced DTA is more effective and direct to show catalytic combustion characteristics of pulverized coal.

关键词： Calcium carbonate

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Preparation and characterization of ZnO/ZnS hybrid photocatalysts via microwave-hydrothermal method

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Frontiers of Environmental Science & engineering 2008年第4期2卷 415-420页

作者： Jinglian ZHAO Liang ZHAO Xinping WANG State Key Laboratory of Multiphase Flow in Power Engineering Department of Environmental EngineeringXi’an Jiaotong UniversityXi’an 710049China Department of Physics and Astronomy Rice UniversityHoustonTX 77005-1657USA

The photocatalytic performance of ZnO/ZnS hybrid nanocomposite was largely higher than that of the mere ZnO or ZnS nanoparticles,but the complicated procedure and misdistribution of final products limited its large-scale *** exploration of a novel synthesis route of ZnO/ZnS hybrid photocatalysts with high catalytic performance is becoming a crucial step for the large-scale application of ZnO/ZnS hybrid photocatalytic *** and characterization of nanosized ZnO/ZnS hybrid photocatalysts were studied in this *** photocatalysts were obtained via microwavehydrothermal crystallization with the help of sodium *** products were characterized by X-ray diffraction(XRD),transmission electron microscopy(TEM),particle size distribution(PSD),and Fourier transformed infrared spectroscopy(FT-IR).The results indicated that so-synthesized ZnO/ZnS samples consisted of the high pure cubic(sphalerite)ZnS and hexagonal ZnO nanocrystallines with a narrow particle size *** possible formation mechanisms of ZnO/ZnS nanocrystallines were mainly attributed to the superficially protective effect of *** photocatalytic experiments demonstrated that the ZnO/ZnS photocatalysts exhibited a higher catalytic activity for the degradation of acid fuchsine than other monocomponents.

关键词： photocatalyst ZnO/ZnS sodium citrate hydrothermal microwave

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Brownian Dynamics Simulation of Microstructures and Elongational Viscosities of Micellar Surfactant Solution

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Chinese Physics Letters 2008年第12期25卷 4469-4472页

作者：魏进家 KAWAGUCHI Yasuo 宇波李凤臣 State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an 710049 Department of Mechanical Engineering Faculty of Science and Technology Tokyo University of Science Noda Chiba 2788-510 Japan Beijing Key Laboratory of Urban Oil and Gas Distribution Technology China University of Petroleum (Beijing) Beijing 102249 School of Energy Science and Engineering Harbin Institute of Technology Harbin 150001

Brownian dynamics simulation is conducted for a dilute surfactant solution under a steady uniaxial elongational flow. A new inter-cluster potential is used for the interaction among surfactant micelles to determine the micellar network structures in the surfactant solution. The micellar network is successfully simulated. It is formed at low elongation rates and destroyed by high elongation rates. The computed elongational viscosities show elongation- thinning characteristics. The relationship between the elongational viscosities and the mierostructure of the surfactant solution is revealed.

关键词： field emission molybdenum dioxide enhancement factor

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Anthracite combustion catalyzed by Ca-Fe-Ce series catalyst

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Ranliao Huaxue Xuebao/Journal of Fuel Chemistry and Technology 2009年第4期37卷 421-426页

作者： Gong, Xu-Zhong Guo, Zhan-Cheng Wang, Zhi State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Acad. of Sci. Beijing 100190 China Graduate University of Chinese Acad. of Sci. Beijing 100049 China Key Laboratory of Recycling and Ecological Metallurgy University of Science and Technology Beijing Beijing 100083 China

The effect of Ca-Fe-Ce series catalyst on the characteristics of anthracite combustion was investigated by thermo-gravimetric analysis. The results showed that there may be a synergetic effect among the components in the composite catalyst and the composite catalyst exhibits better performance than the single one for the anthracite combustion. The combustion characteristics of anthracite are affected by the dispersion of catalyst, heating rate and combustion atmosphere. The catalytic effect is enhanced by increasing the catalyst dispersion. The reduction degree of ignition temperature increases with the increase of heating rate. The ignition temperature decreases significantly with the increase of O2 concentration.

关键词： Thermogravimetric analysis

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