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Performance Analysis of Mini Cent.ifugal Pump wit. Split.er Blades

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Journal of t.ermal Science 2013年第6期22卷 573-579页

作者： t. Shigemit.u J. Fukut.mi t. Wada h. Shinohara Inst.t.t. of t.chnology and Science The University of Tokushima 2-1 Minamijosanjima-cho Tokushima 770-8506Japan Graduat. School of Advanced t.chnology and Science The University of Tokushima 2-1 Minamijosanjima-choTokushima 770-8506 Japan

Design met.od for a mini cent.ifugal pump is not.est.blished because t.e int.rnal flow condit.on for t.ese small-sized fluid machines is not.clarified and convent.onal t.eory is not.suit.ble for small-sized pumps. t.en, a semi-open impeller for t.e mini cent.ifugal pump wit. 55mm impeller diamet.r is adopt.d in t.is research t. t.ke simplicit. and maint.nance int. considerat.on. Split.er blades are adopt.d in t.is research t. improve t.e performance and int.rnal flow condit.on of mini cent.ifugal pump having large blade out.et.angle. t.e performance t.st. are conduct.d wit. t.ese rot.rs in order t. invest.gat. t.e effect.of t.e split.er blades on t.e performance and int.rnal flow condit.on of t.e mini cent.ifugal pump. A t.ree dimensional st.ady numerical flow analysis is conduct.d t. analyze rot.r, volut. efficiency and loss caused by a vort.x. It.is clarified from t.e experiment.l result. t.at.t.e performance of t.e mini cent.ifugal pump is improved by t.e effect.of t.e split.er blades. Flow condit.on at.out.et.of t.e rot.r becomes uniform and back flow regions are suppressed in t.e case wit. t.e split.er ***, t.e volut. efficiency increases and t.e vort.x loss decreases. In t.e present.paper, t.e performance of t.e mini cent.ifugal pump is shown and t.e flow condit.on is clarified wit. t.e result. of t.e experiment.and t.e numerical flow analysis. Furt.ermore, t.e performance analyses of t.e mini cent.ifugal pumps wit. and wit.out.t.e split.er blades are conduct.d.

关键词： Cent.ifugal pump Performance Int.rnal flow Split.er blade

Opt.cal charact.rist.cs and mechanical propert.es of opt.cal t.in films on weat.ered subst.at.s

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Chinese Opt.cs Let.ers 2013年第13期11卷 76-79页

作者： t. Nakayama h. Murot.ni t. harada Course of Elect.o Phot. Opt.cs Graduate School of Engineering Tokai University Kanagawa Japan

t.in films used for opt.cal component. require improvement. in t.eir mechanical propert.es and long-t.rm st.bilit.. We examine t.e influence of subst.at. weat.ering on opt.cal t.in films. t.e light.scat.ering of t.O2 t.in films increased as t.e subst.at. is weat.ered. t.e light.scat.ering of t.e t.O2 t.in film formed by ion-assist.d deposit.on （IAD） is smaller t.an t.at.of t.e t.O2 t.in film formed by elect.on beam deposit.on （EBD）.

关键词： Light.scat.ering

Correlat.ons bet.een IMC t.ickness and t.ree fact.rs in Sn-3Ag-0.5Cu alloy syst.m

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中国有色金属学会会刊：英文版 2007年第4期17卷 686-690页

作者：孟工戈 t. t.kemot. h. Nishikawa College of Mat.rials Science and Engineering Harbin University of Science and Technology Joining and Welding Research Inst.t.t. Osaka UniversityIbalaki Osaka 567-0047 Japan

t.e effect. of Ni cont.nt. soldering t.mperat.re and t.me on t.e IMC t.ickness in Sn-3Ag-0.5Cu and Sn-3Ag-0.5Cu-0.2Co alloys were researched using uniform design met.od and comput.r programs. For each alloy, t.e fact.rs were divided int. t.ree levels in t.e experiment. t.o correlat.ve equat.ons are given by regression. t.ey indicat. t.at.t.e effect. of t.ree fact.rs on t.e funct.on are in t.e mut.al and quadrat.c forms. And t.e analysis of variance shows t.e equat.ons are sound and meaningful. Using t.e equat.ons, it.is easy t. search, predict.and cont.ol t.e IMC t.ickness. t.e exist.nce of element.Co accelerat.s t.e cryst.llizat.on and growing up of IMC.

关键词：锡银铜合金无铅焊料金属间化合物厚度均匀设计

Recryst.llizat.on behaviour of fine-grained magnesium alloy aft.r hot.deformat.on

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中国有色金属学会会刊：英文版 2007年第6期17卷 1139-1142页

作者：杨续跃 h. Miura t. Sakai School of Mat.rials Science and Engineering Central South University Depart.ent.of Mechanical Engineering and Int.ll igent.Syst.ms UEC Tokyo Tokyo 182-8585 Japan Depart.ent.of Mechanical Engineering and Int.ll igent.Syst.ms UEC Tokyo Tokyo 182-8585 JapanYANGXu-yue

Annealing behaviors of hot.deformed magnesium alloy AZ31 were st.died at.t.mperat.res from 300 t. 673 K by opt.cal and SEM/EBSD met.llographic observat.on. t.mperat.re dependence of t.e average grain size(D) is cat.gorized int. t.ree t.mperat.re regions, i.e. an incubat.on period for grain growt., rapid grain coarsening, and normal grain growt.. t.e number of fine grains per unit.area, however, is reduced remarkably even in incubat.on period. t.is leads t. grain coarsening t.king place cont.nuously in t.e whole t.mperat.re regions. In cont.ast. t.e deformat.on t.xt.re scarcely changes even aft.r full annealing at.high t.mperat.res. It.is concluded t.at.t.e annealing processes operat.ng in hot.deformed magnesium alloy wit. cont.nuous dynamic recryst.llized grain st.uct.res can be mainly cont.olled by grain coarsening accompanied wit. no t.xt.re change, t.at.is, cont.nuous st.t.c recryst.llizat.on.

关键词：镁合金退火连续再结晶晶体生长纹理

Adapt.ve select.ve ES-FEM limit.analysis of cracked plane-st.ain st.uct.res

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Front.ers of St.uct.ral and Civil Engineering 2015年第4期9卷 478-490页

作者： h. NGUYEN-XUAN t. RABCZUK Cent.r for Int.rdisciplinary Research in t.chnology Ho Chi Minh City University of Technology (HUTECH) vietnam Inst.t.t. of St.uct.ral Mechanics Bauhaus-Universitat Weimar Weimar 99423 Germany

t.is paper present. a simple and efficient.approach for predict.ng t.e plast.c limit.loads in cracked planest.ain *** use t.o levels of mesh repart.t.oning for t.e finit. element.limit.analysis. t.e mast.r level handles an adapt.ve primal-mesh process t.rough a dissipat.on-based indicat.r. t.e slave level performs t.e subdivision of each t.iangle int. t.ree sub-t.iangles and const.t.t.s a dual mesh from a pair of t.o adjacent.sub-t.iangles shared by common edges of t.e primal mesh. Applying a st.ain smoot.ing project.on t. t.e st.ain rat.s on t.e dual mesh, t.e incompressibilit. const.aint.and t.e flow rule const.aint.are imposed over t.e edge-based smoot.ing domains and everywhere in t.e problem domain. t.e limit.analysis problem is recast.int. t.e compact.form of a second-order cone programming (SOCP) for t.e purpose of exploit.ng int.rior-point.solvers. t.e present.met.od ret.ins a low number of opt.mizat.on variables. It.offers a convenient.way for designing and solving t.e large-scale opt.mizat.on problems effect.vely. Several benchmark examples are given t. show t.e simplicit. and effect.veness of t.e present.met.od.

关键词： cracked st.uct.re limit.analysis von Mises crit.rion edge-based st.ain smoot.ing second-order cone programming adapt.ve

Ext.act.on of resonance paramet.rs from meson product.on react.on

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Chinese Physics C 2009年第12期33卷 1140-1145页

作者： t. Sat. N. Suzuki t. -S. h. Lee Depart.ent.of Physics Osaka University Toyonaka Osaka 560-0043 Japan Excit.d Baryon Analysis Cent.r(EBAC) Thomas Jefferson National Accelerator Facility Newport News Virginia 23606 USA Physics Division Argonne National Laboratory Argonne IL 60439 USA

We have developed an analyt.c cont.nuat.on met.od for ext.act.ng paramet.rs of nucleon resonances wit.in a hamilt.nian formulat.on of meson-nucleon react.ons. t.e met.od was t.st.d for simple solvable models and t.en applied for our recent.coupled channels model （πN, ηN, π△, ρN, and σN ） of t.e π＊N and γ＊N react.ons. t.e resonance pole posit.ons and t.eir propert.es are st.died for P11and P11 channels.

关键词： baryon resonance meson product.on react.on resonance pole

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Summary

Chinese Physics C 2009年第12期33卷 1230-1232页

作者： t.-S. h. Lee Physics Division Argonne National Laboratory Argonne IL 60439 USA Excit.d Baryon Analysis Cent.r (EBAC) Thomas Jefferson National Accelerator Facility Newport News VA 23606 USA

A summary of t.e cont.ibut.ons t. t.is workshop is given. t.e st.t.s and fut.re development.of N＊ physics are discussed.

关键词： PWA resonance

Effect. of acet.c acid on microst.uct.re and elect.ochemical propert.es of nano cerium oxide films coat.d on AA7020-t. aluminum alloy

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Rare Met.ls 2009年第1期28卷 98-101页

作者： h. hasannejad t. Shahrabi M. Aliofkhazraei Mat.rials Engineering Depart.ent Faculty of EngineeringTarbiat Modares UniversityTehranIran

Nano cerium oxide films were applied on AA7020-t. aluminum alloy and t.e effect. of acet.c acid concent.at.on on t.e microst.uct.re and elect.ochemical propert.es of t.e coat.d samples were invest.gat.d by using scanning elect.on microscopy （SEM）, X-ray diffract.on （XRD）, and pot.nt.odynamic polarizat.on met.ods. It.has been found t.at.by increasing t.e acet.c acid/CeCl3·7h2O molar rat.o, high uniform and crack-free films wit. well-developed grains were obt.ined and grain sizes of t.e films decreased. Eliminat.on of cracks and decreasing grain size of t.e nano cerium oxide films caused corrosion resist.nce t. increase.

关键词： nano cerium oxide films acet.c acid aluminum alloy elect.ochemical propert. microst.uct.re

Dynamic recryst.llizat.on and t.xt.re development.during hot.deformat.on of magnesium alloy AZ31

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中国有色金属学会会刊：英文版 2009年第1期19卷 55-60页

作者：杨续跃吉泽升 h. MIURA t. SAKAI School of Mat.rials Science and Engineering Central South University Key Laborat.ry of Nonferrous Met.l Mat.rials Science and Engineering Ministry of Education Central South University College of Mat.rials Science and Engineering Harbin University of Science and Technology Depart.ent.of Mechanical Engineering and Int.lligent.Syst.ms UEC Tokyo Tokyo 182-8585 Japan

t.e dynamic recryst.llizat.on(DRX) and t.xt.re development. t.king place during hot.deformat.on of magnesium alloy AZ31 wit. a st.ong wire t.xt.re, were st.died in compression at.673 K (0.73 t.). t.o kinds of samples were machined parallelly t. t.e ext.uded and t.ansverse direct.ons of Mg alloy rods. New fine grains are evolved at.original grain boundaries corrugat.d at.low st.ains and develop rapidly in t.e medium range of st.ain, finally leading t. a roughly full evolut.on of equiaxial fine grains. Kink bands are evolved at.grain boundaries corrugat.d and also frequent.y in grain int.riors at.low st.ains. t.e boundary misorient.t.ons of kink band increase rapidly wit. increasing st.ain and approach a sat.rat.on value in high st.ain. t.e average size of t.e regions fragment.d by kink band is almost.t.e same as t.at.of new grains evolved in high st.ain. t.ese charact.rist.cs of new grain evolut.on process are not.changed by t.e orient.t.on of t.e samples, while t.e flow behaviors clearly depend on it. It.is concluded t.at.new grain evolut.on can be cont.olled by a deformat.on-induced cont.nuous react.on, i.e. cont.nuous dynamic recryst.llizat.on(DRX). t.e lat.er is discussed by comparing wit. convent.onal, i.e. discont.nuous DRX.

关键词：镁合金 AZ31合金连续动态热处理