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| 1 | CFD-simulation of a circulating fluidized bed riser显示文摘In the current work,a model of the fluid mechanics in the riser of a circulating fluidized bed(CFB)has been implemented using computational fluid dynamics(CFD).The model developed shall be used in future as the basis of 3D-reactor model for the simulation of large scale CFB combustors.The two-fluid model(TFM)approach is used to represent the fluid mechanics involved in the flow.The computational implementation is accomplished by the commercial software FLUENT.Different closure formulations are tested on a simplified geometry.Two different turbulence formulations,namely the swirl modified RNG k–εmodel and the Realizable k–εmodel,are tested in combination with two different approaches to solid phase turbulence,namely the dispersion and per phase approach.One focus of the current work is put on the study of different drag correlations.Besides the drag correlations by Syamlal et al.[Syamlal,M.,Rogers, W.,&O’Brien,T.J.(1993).MFIX documentation theory guide.Technical Report DOE/METC-94/1004,U.S. Department of Energy(DOE).Morgantown Energy Technology Center:Morgantown,WV]and Gidaspow [Gidaspow,D.(1994).Multiphase flow and fluidization.New York:Academic Press]the EMMS model has been used to determine the momentum exchange between the two phases.The resulting formulation is then used to simulate a 1-m×0.3-m cold CFB setup and is validated by experimental results[Schlichthrle, P.(2000).Fluid dynamics and mixing of solids and gas in the bottom zone of circulating fluidized beds. Unpublished doctoral dissertation,Technische Universitaet Hamburg-Harburg,Shaker Verlag:Aachen]. | Ernst-Ulrich Hartge Lars Ratschow Reiner Wischnewski Joachim Werther | 2009 | Particuology2009，7，4： | 39 |
| 2 | 再发性低血糖致幼鼠脑损伤的实验研究显示文摘目的探讨再发性低血糖幼鼠脑Caspase-3表达及神经元变性的动态变化。方法将48只15日龄C57BL/6野生型小鼠,分为正常对照组(n=8)及低血糖组(n=40),再分为低血糖后12h,24h,48h,72h组,每组10只)。低血糖组给予短效胰岛素腹腔注射3次,每次剂量为5U/kg。采用免疫组化方法观察小鼠脑内caspase-3表达的动态变化;FJB染色观察小鼠脑内神经元变性的时程及分布情况。结果再发性低血糖后12h幼鼠脑内caspase-3表达即增多,24h达高峰,至72h仍高于正常对照组;开始阳性染色主要位于细胞质,以后逐渐向细胞核转移,caspase-3表达最强的部位是海马齿状回,皮质次之,海马CA1区仅见少量caspase-3阳性细胞。再发性低血糖后12h,脑内即可见FJB阳性细胞,24h及48hFJB阳性细胞逐渐增多,至72h阳性细胞最多,染色最强;从分布上看,纹状体内FJB阳性细胞数最多(尤以枕部皮质与纹状体交界处为著),皮质次之,海马回仅见少量FJB阳性细胞。结论再发性低血糖可致幼鼠脑损伤,神经元凋亡与坏死并存,易损部位为海马齿状回、枕部皮质与纹状体交界处,以选择性神经元死亡为主。 | 辛颖 WERTHER GA RUSSO VC | 2006 | 中国现代医学杂志2006，16，5： | 6 |
| 3 | Simulation-supported measurements in large circulating fluidized bed combustors显示文摘The concept of simulation-supported measurement is suggested for the elucidation of processes occurring in the combustion chambers of large-scale circulating fluidized bed combustors where the desired information cannot be obtained by direct measurements.The concept is illustrated with the example of secondary air injection where the way the air is released,the penetration depth and the evenness of air distribution over the cross-sectional area of the combustion chamber are of interest.The measured information consists of lateral profiles of oxygen concentrations measured with gas sampling probes at two ports which were located 5 and 9 m,respectively,above the level of secondary air injection.The simulation is carried out on the basis of a 3D semi-empirical fluid-mechanical model of the circulating fluidized bed which is combined with models of gas and solids mixing,fuel distribution,devolatilization and combustion of char and volatiles.The combination of the simulation with the measurements yields a clear picture of the mechanism of secondary air injection,its penetration into the combustion chamber and its effect on the local combustion processes.The results confirm the usefulness of the concept of simulation-supported measurement for this application. | Joachim Werther Ernst-Ulrich Hartge Lars Ratschow Reiner Wischnewski | 2009 | Particuology2009，7，4： | 5 |
| 4 | Reactive gas-solids flows in large volumes—3D modeling of industrial circulating fluidized bed combustors显示文摘A model is presented for the simulation of reactive gas-solids flows in large industrial reactors. Circulating fluidized bed (CFB) combustors with several thousands of cubic meters reaction volume are probably the largest reactors of this type. A semi-empirical modeling approach has been chosen to model the three-dimensional concentration distributions of gas and solids components and temperatures inside the combustion chamber of such boilers. Two industrial CFB boilers are investigated in detail: the 105 MWe Duisburg combustor in Germany and the 235 MWe Turów combustor in Poland. The semi-empirical model approach is described first. Then the model is used to show how the three-dimensional concentration and temperature fields are formed by the interaction of several local phenomena. Good agreement between simulation and measurements has been achieved. | Reiner Wischnewski Lars Ratschow Ernst-Ulrich Hartge Joachim Werther | 2010 | Particuology2010，8，1： | 5 |
| 5 | 葡萄糖转运蛋白-1和-3在缺氧缺血性脑损伤新生大鼠脑内表达的变化及意义显示文摘目的探讨缺氧缺血性脑损伤(H IBD)后脑内负责葡萄糖转运的两个重要蛋白质葡萄糖转运蛋白-1(GLUT-1)与葡萄糖转运蛋白-3(GLUT-3)表达的变化,揭示H IBD后脑内能量衰竭的发病机制。方法将30只7日龄W istar大鼠随机分为正常对照组(n=5)、假手术对照组(n=5)和H IBD组(n=20)。H IBD组大鼠模型的制备参照R ice。方法结扎右侧颈总动脉后8%低氧暴露1 h。假手术对照组只分离右侧颈动脉,不予结扎和缺氧。缺氧缺血后1,3,5,10 d各处死5只H IBD大鼠,免疫组化方法检测大鼠脑内GLUT1及GLUT3表达,并与对照组和假手术组比较。结果正常新生大鼠脑内微血管即可见GLUT1表达。H IBD后1 d,缺血侧半球GLUT1表达略有增加,3 d达高峰,至5 d时仍高于正常,10 d基本恢复正常水平。H IBD后1 d,GLUT3表达无明显变化,3 d时GLUT3表达已明显减少,5 d时进一步减少,10 d时仍显著低于对照组。GLUT3表达减少最显著的部位为海马CA1区。结论H IBD后脑内GLUT1和GLUT3的表达异常可导致脑能量代谢途径改变,加重缺氧缺血后神经元的损伤及影响损伤神经元的修复。 | 辛颖 Vince RUSSO George WERTHER | 2005 | 中国当代儿科杂志2005，7，6： | 4 |
| 6 | Sewage sludge combustion显示文摘 | J. Werther T. Ogada | 1998 | Progress in Energy and Combustion Science1998，，1： | 2 |
| 7 | Mucin-associated sialosyl-Tn antigen expression in gastric cancer correlates with an adverse outcome显示文摘 | Werther JL MacMurray SR Bruckner H | 1994 | Br J Cancer1994，69，3： | 1 |
| 8 | Des(1-3) IGF-1 potently enhances differentiated cell growth in olfactory bulb organ culture显示文摘 | RUSSO VC WERTHER GA | 1994 | Growth Factors1994，11，： | 1 |
| 9 | Sewage sludge combustion 显示文摘 | Werther J Ogada T | 1999 | Prog Energy Combust Sci1999，25，： | 1 |
| 10 | Persistent hyperinsulinaemic hypoglycaemia of infancy: 15 years' experience at the Royal Children's Hospital (RCH), Melbourne 显示文摘 | Ismail D Werther G | 2005 | Pediatr Endocrinol Metab2005，18，11： | 1 |
| 11 | Solublevascular endothelial growth factor levels in patients with primarycolorectal carcinoma : the Danish RANX05 colorectal Cancer StudyGroup显示文摘 | WERTHER K CHRISTENSEN I J BRUNNER N | 2000 | Eur J Surg Oncol2000，26，7： | 1 |
| 12 | Catalyst attrition in fluidized-bed systems 显示文摘 | Werther J Reppenhagen J | 1999 | AIChE Journal1999，45，9： | 1 |
| 13 | NOxand N2O emission characteristics from fluidized bed combustion of semidried munlcipal sewage sludge显示文摘 | Sanger M Werther J OgadaT | 2001 | Fuel2001，80，2： | 1 |
| 14 | Combustion characteristics of wet sludge in a fluidized bed-Release and combustion of the volatiles显示文摘 | Ogada T Werther J | 1996 | Fuel1996，75，5： | 1 |
| 15 | Catalyst attrition incyclones显示文摘 | EPPENHAGEN J WERTHER J | 2000 | Powder Technology2000，113，12： | 1 |
| 16 | Combustion of agricultural residues显示文摘 | Werther J Saenger M | 2000 | Progress in Energy and Combustion Science2000，26，： | 1 |
| 17 | General framework for consistent sampling in Hilbert spaces 显示文摘 | Eldar Y C Werther T | 2005 | Int J Wavelets Multi Inf Pro2005，3，3： | 1 |
| 18 | Sewage sludge combustion 显示文摘 | J Werther Togada | 1999 | Progress in Energy and Combustion Science1999，，25： | 1 |
| 19 | Persistent hyperinsulinaemic hypogly- eaemia of infancy: 15 years' experience at the Royal Chil- dren's Hospital (RCH), Melbourne 显示文摘 | Ismail D Werther G | 2005 | J Pediatr Endoerinol Metab2005，18，11： | 1 |
| 20 | Structure Driven Strategy and Virtual Organization Design显示文摘 | William B Werther JR | 1993 | Business Horizon1993，，3： | 1 |
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