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Fractal Characteristics of oil-gas-Water Multiphase Flow

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Journal of Thermal Science 2002年第1期11卷 49-52页

作者： Huanqun Qian Zhihua Hu Hedong Sun Fangde Zhou Xi An Jiao Tong Univ State Key Lab Multiphase Flow Power Engn Xian 710049 Shaanxi Peoples R China

Experiments were conducted with oil-gas-water multiphase flow in a horizontal pipe under different flow patterns. The fractal method was applied to analyze the pressure drop signals measured in the experiments. The fractal dimensions of the signals were calculated. Preliminary results indicated that the fractal dimensions were small and different under different flow patterns. The fractal dimensions could be used to identify the flow patterns of the oil-gas-water multiphase flows.

关键词： oil-gas/air-water correlation dimension fractals flow regime.

Gel formation in extracted organic phase and FT-IR characterization

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Chinese Science Bulletin 1997年第14期42卷 1168-1172页

作者： Shen, YH Wang, DJ Wu, JG BEIJING UNIV COLL CHEM & MOL ENGNSTATE KEY LAB RARE MAT CHEM & APPLICATBEIJING 100871PEOPLES R CHINA

IN the early 1980s, Wu and co-workers indicated that the saponification of acidic extractants,such as di(2-ethylhexyl) phosphoric acid (D2EHPA), 2-ethylhexyl phosphoric acid mono 2-ethylhexylester (PC88A), and naphthenic acid (NA), is a process of the formation of a wa-ter-in-oil (w/o) microemulsion in the organic phase. From then on, the aggregation behav-ior of this sort of extractant and metal-extractant complex in bulk phases has been investigatedfor about twenty years. The microstructure and properties of organic aggregates were ex-

关键词： DMHPA lanthanide extraction gel FT-IR.

Geological emission of methane from the Yakela condensed oil/gas field in Talimu Basin, Xinjiang, China

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Journal of Environmental Sciences 2008年第9期20卷 1055-1062页

作者： Tang Junhong Bao Zhengyu Xiang Wu Gou Qinghong China Univ Geosci Minist Educ Key Lab Biogeol & Environm Geol Wuhan 430074 Peoples R China Hangzhou Dianzi Univ Dept Environm Engn & Sci Hangzhou 310018 Peoples R China Sun Yat Sen Univ Dept Earth Sci Guangzhou 510275 Guangdong Peoples R China

A static flux chamber method was applied to study natural emissions of methane into the atmosphere in the Yakela condensed oil/gas field in Talimu Basin, Xinjiang, China. Using an online method, which couples a gas chromatography/high-temperature conversion/isotope ratio mass spectrometry (GC/C/MS) together, the 13C/12C ratios of methane in the flux chambers were measured. The results demonstrated that methane gases were liable to migrate from deep oil/gas reservoir to the surface through microseepage and p...

关键词： the Yakela condensed oil/gas field methane emission stable carbon isotopes flux chamber

Study on the Tribological Properties of Graphite-like Amorphous Carbon Film under Different Testing Conditions

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稀有金属材料与工程 2012年第S1期41卷 359-365页

作者： Wang Yongjun Li Hongxuan Ji Li Zhao Fei Liu Xiaohong Wu Yanxia Zhou Huidi Chen Jianmin Chinese Acad Sci Lanzhou Inst Chem Phys State Key Lab Solid Lubricat Lanzhou 730000 Peoples R China Chinese Acad Sci Grad Univ Beijing 100049 Peoples R China Henan Univ Sci & Technol Sch Mat Sci & Engn Luoyang 471003 Peoples R China

Graphite-like amorphous carbon film was fabricated by unbalanced magnetron sputtering technique.Raman spectroscopy,atomic force microscopy(AFM)and tribometer were subsequently used to investigate the microstructure and tribological properties of the resultant film.It is found that the deposited carbon film is dominated by sp 2 sites,and the intensity ratio of the D and G peaks is as high as 4.0,which is one order of magnitude larger than that of diamond-like carbon films with high sp 3 content,indicating a more graphite-like structure.However,the as-deposited carbon film exhibits moderately high hardness(13.7 GPa),low internal stress(0.38 GPa)and superior tribological properties with high load bearing capacity(Hertz contact stress about 3.2 GPa)and low wear rate(2.73×10-10 cm3/N.m)in ambient atmosphere.Although it displays a poor wear resistance in water lubricated condition,a superior wear resistance is achieved in oil lubricated condition.Its inherent physical property,the formation of transfer layer and the friction induced chemical reactions may be commonly responsible for its tribological properties.

关键词： magnetron sputtering graphite-like carbon film microstructure tribological properties load bearing capacity

Analysis and Control on Fracture of 20Mn2A High Tensile Steel for Round Link Chain

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Journal of Iron and Steel Research(International) 2011年第S1期18卷 898-902页

作者： CAO Shu-wei 1,2,KANG Yong-lin 1,3,ZHAO Xian-ping 2,YANG Chang-chun 1 (1.School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China 2.Technology Center of Anyang Iron & Steel Group Co.,Ltd.,Anyang 455004,Henan,China 3.State key laboratory for Advanced Metals and Materials,University of Science and Technology Beijing,Beijing 100083,China) Univ Sci & Technol Beijing Sch Mat Sci & Engn Beijing 100083 Peoples R China Anyang Iron & Steel Grp Co Ltd Ctr Technol Anyang 455004 Henan Peoples R China Univ Sci & Technol Beijing State Key Lab Adv Met & Mat Beijing 100083 Peoples R China

Based on the phenomenon of brittle fracture occurred during tensile test for 20Mn2A high strength circular chain used in coal mines,the fracture property is regarded as intercrystalline brittle one after macroscope observation and metallographic examination.It is analysed that the intercrystalline brittle fracture is due to high tempering temperature and limited processing site where final products are piled together after heat treatment,which lead to a lower cooling rate of internal chain,with Si,Mn and P etc elements segregating and enriching in the austenite grain boundary and forming high tempering brittleness.After these circular chains are tempered again for one hour at 670℃,and oil-cooled rapidly,due to the reversibility of high temper brittleness for structural alloy steel,the high temper brittleness can be eliminated and products are completely qualified after tensile inspection.

关键词： high strength circular chain metallographic examination brittle fracture high tempering brittleness improvement measures