水下排气气泡运动特性及其数值模拟研究

:2004202212.:(19642),,;,(430074).E2mail:[e-mail](,430074):,.,,,,,,.:;;:TV131.3+2:A:167124512(2004)1020049202MovementcharacteristicofexhaustbubbleinwateranditsnumericalsimulationJiangYankunAbstract:Apracticalmathematicsmodelingforbubblemovementinthefieldofengineeringwasbuiltbyanalyzingapparentforcesofexhaustbubbleinwater.Thebubblemovementcharacteristicswereobtainedbysolvingtheequation.Theresultsshowedthatthebubblesmovedupwardsinalittletimeafterdeviatingexhaustport;theuprightorientationvelocityachievedalessfluctuantfixedvalue;thelevelorientationve2locityachievedzero.Keywords:exhaustbubble;water;movementmodeling;numericalsimulationJiangYankunAssoc.Prot.;CollegeofEnergy&PowerEng.,HuazhongUniv.ofSci.&Tech.,Wuhan430074,China.,[1].,,,.,,,,,.,.1,,.4,1.1a.Ff,.Ff=V(L-g)gVLg,,V,(0.005m),,V=4r3/3=4(db/2)3/3,db;L;g.b.FG,.FG=mg,,m,m=Vg.3210()Vol.32No.10200410J.HuazhongUniv.ofSci.&Tech.(NatureScienceEdition)Oct.2004c.FD,,,.FD=CLfw2,,C;f;w,w=ds/d.d.FI,,FI=-m(d2s/d2).,d2s/d2.2,,.x(y)FIx-FDx=0;zFf-FG-FDz+FIz=0.,:-m(d2x/d2)-CLfz(dx/d)2=0;VLg-FG-CLfx(dz/d)2-md2z/d2=0,,fxx;fzz.RKF[2],,,;,,.g9.8m/s2,C0.15,L1000kg/m3,g29.74kg/m3,db=0.004m,x1.74m/s,y2.06m/s,z0m/s,,,t0.1s,1s,10s50s.41.14t/sw/ms-1/mmwxwywzxyz0.10.05200.05200.4070334010.00050.00050.40704441100.00010.00010.406956407500.00000.00000.4069662035x,y,z,,0.1sx,zx2y2z,2.,x,y0;z,,,0.42m/s;yx,0;,,.,x,y,zxy,20.1s,;z.,,,,.,,.,,,.[1]DomenicoC,DamianoV,RobertoB,etal.Astudyoncoalescenceandbreakagemechanismsinthreedifferentbubblecolumns.ChemicalEngineeringScience,1999,54(21):47674777[2],,.Runge2Kutta.,1996,20(1):434705()32