球体蓄热体的热饱和时间

264Vol.26No.420048JournalofUniversityofScienceandTechnologyBeijingAug.20042003–04–02,24,(No.50144005)1000,[1~4]1R,t0,,t[5~8]ct=1r2tr2tr(1),c(1)=0,0rR,tr=t0.r=R,tr=tt;r=0,tr=0.21=c,t=1rrrtr(2)2.1snsnt1PtP0r=+sn1r2trr2trr=+1r2Pr2ntrnrs2trs=100083.C++TF7771Fig.1SketchmapofgridpartitioningNnPsNVol.26No.4•367•rP2rP+r22tN1tP1rrPr22tP1tS1r.rP2r2rPr22tS1+1+rP2r22rP2+r22tP1rP2r2rP+r22tN1=tP0(3)2.21PnPnt1PtP0r2=+1r2Pr2ntrnrP2trP.rP2=rn2;trr=0(r=0P)tP1tP0r2=r.1+2r2tP12r2tN1=tP0(4)2.31sPR,sPt1RtR0r2=+1r2Rr2RtrRrs2trs.r=Rtr=tttrR=ttR.t1RtR0r2=+1r2RttRrs2tRtSr=rR2rR2ttR1rRr22tR1tS1r2r2rRr2rR2tS1+1+2r2r+2r2rRr2rR2tR1=tR0+2r2rt(5)32.15W/(mK)1630kg/m35.0W/(mK)850J/(kgK)3.5mm,9010001x1x2850950(901000)9001000(901000)12.3.3.32Fig.2FlowchartofcomputinginprogramBi0.1?t0tn10.1?t0t0.1?1Table1Originaldataofheatsaturatingtimeandheatconvectioncoefficient/(Wm2K1)/sx1/%x2/%8509009501000159711815428320.1458.320728811621220.7559.42558719317120.4758.53048607714220.4257.7•368•200441~39001000(901000)58%85095010020%4(1)(2).900100058%85095020%1(NKK).[A].[C].19992,.[A].ProceedingsofBeijingSymposiumonHighTemperatureAirCombustion[C].Beijing,19993.[M].:,19984.[J].,2000,31(4):3115,,.[M].:,20006,.[M].:,19957AJ.[M]..,19848.[M].:,1979HeatSaturatingTimeofSolidSphereRegeneratorLUQingheng,CHENGSusen,YANGTianjunMetallurgicalandEcologicalEngineeringSchool,UniversityofScienceandTechnologyBeijing,Beijing100083,ChinaABSTRACTTheregeneratorintheoutletofareheatingfurnacewasstudied.Aone-dimensionalunsteadystatemodelwassetupandgotdiscretizationthroughfinitedifferencemethod.Aprogramofcomputingtheheatsatu-ratingtimeofthesolidsphereregeneratorwasdevelopedbyC++language.Therelationshipbetweentheheatsatu-ratingtimeandthefactorswhichinfluencethetimewasdetermined.Itisshownthattheheatsaturatingtimedecre-asedwhentheheatconvectioncoefficientincreased;whereastheincreaseofheatcapacity,densityanddiameterofregeneratormadetheheatsaturatingtimeincreaselinearly.KEYWORDSregenerator;heatsaturatingtime;mathematicalmodel2Table2Originaldataofheatsaturatingtimeandregener-atordensity/(kgm3)/sx1/%x2/%850900950100016008910814226020.358.518009912216029320.858.4200011113717832420.757.7220012215019535620.557.9240013216321338920.858.13Table3Originaldataofheatsaturatingtimeandregener-atordiameterr/mm/sx1/%x2/%85090095010003.59011114526520.758.14.010312716530220.557.94.511714318634020.357.95.012915920737820.657.98008509009501000/(Jkg1K1)3Fig.3Relationofheatsaturatingtimewiththeheatcapac-ityoftheregenerator100110120130140150/s900