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37120031JOURNALOFXIANJIAOTONGUNIVERSITYVol.371Jan.2003,,(,710049,):CTIP,,,.,.:2;60120-60-120,,,,.:;;:TV13112:A:0253-987X(2003)01-0049-04ResearchontheDistributionsofDifferentialPressureandMassFlowrateofFluidinComplexPipelineSystemZhouYuming,HeQishan,ZhangJun(SchoolofEnergyandPowerEngineering,XianJiaotongUniversity,Xian710049,China)Abstract:Aonedimensionalmathematicmodelforprofileofflowratedistributionispresentedandthedescriptionoftheprofileinthecomplexflowsystemisobtained.Theprofileinthemodeloftwoparallelplateswithcolumnsbetweenthemisobtainedbydy2namicnumericalmethod.Analysisiscarriedoutbycomparingthecalculatedprofilealongtheperimeterofthecolumnwiththefailureoftubesinpractice.Theconclusionsareasfollows:Thefluxinthesub2pipelineclosetochannelinletismorethantwotimesofthefluxintheoneclosetochanneloutlet.Theareawithlowerpressurelocatesmainlyattherangefrom60120degreesand-60-120degrees.Thelowerpressureintheaboveareadecreasesthevelocityinthedirectionoftubeaxisandresultsinanonuniformityprofileininterspacealongthedirectionofcircumference.Andthenonuniformitydistributionsofpressureinthedirectionofcircumfer2enceandthedistributionsofvelocityinthedirectionoftubeaxisareamongprimaryfactorsresultingintubeinvalidation.Keywords:heatexchanger;profile;dynamicnumericalmethod5,,,,50,85%.,,,.,,,,,.11,,4..,90,4,90,4.19,99,90..:2002-03-13.:(1946),,.1234875.,pa.2G0,1,4G0,1.1,G0,1pa,132.22.1:(l)(b)(h)()(Dd),.,(F),:p=FG2p=Fg2.,,,.[1]...(1):901175,F=1175/2A2=01341283,,=01341283.(2):017111,p=(5677182+28317107l)g2,F=5677182+28317107l,,=5677182,=28317107.(3):017111901175,90F=122104,,=122104.(4):F=0141250/h2,,=0141250.,(1)(7),p.2.2(1)pi,j-1=pi,j-1-pa=(+li,j)g2i,j(1):i,i=1,,4;j,j=1,,ni,n1=9,n2=8,n3=7,n4=5();;lij.(2)pi,j-1-p3i,j-1=pi,j-1-p3i,j-1=121A2i,jG2i,j-1A2i,j-1G2i,j-1(2)(3)p1,9-pa=p1,9=G21,9p2,8-pa=p2,8=G22,8p3,7-pa=p3,7=G23,7p4,5-pa=p4,5=G24,5(3):,.(4)p3i,j-1-pi,j=p3i,j-1-pi,j=G2i,j/h2i,j(4):,/h2.(5)p30-p0,1=p30-p0,1=G20,1(5):.(6)p0,1-p1,0=p0,1-p1,0=G21,0p0,2-p2,0=p0,2-p2,0=G22,0p0,3-p3,0=p0,3-p3,0=G23,0p0,4-p4,0=p0,4-p4,0=G24,0(6):,.(7)p0,1-p0,2=p0,1-p0,2=(1/2A2)(G20,2-G20,1)p0,2-p0,3=p0,2-p0,3=(1/2A2)(G20,3-G20,2)p0,3-p0,4=p0,3-p0,4=(1/2A2)(G20,4-G20,3)(7)0537(8)G0,1=G0,2+G1,0;G0,2=G0,3+G2,0G0,3=G0,4+G3,0;G0,4=G4,0;Gi,j-1=Gi,j+gi,j(8)2.3(1)(7)gi,j=nik=jCahi,kG2i,j-G2i,j-12Ai,j-1(+li,j)12(9):Gi,jij19,28,37,45,Cahi,k=+/hi,j+1/2A2i,j;i,j,Cahi,k=/hi,j;i,i=1,,4;j,j=1,,ni,n1=9,n2=8,n3=7,n4=5.G1,0=[(G22,0+12A2(G20,2-G20,1)+(+l2,1)g22,1-(+l1,1)g21,1)/]12G2,0=[(G23,0+12A2(G20,3-G20,2)+(+l3,1)g23,1-(+l2,1)g22,1)/]12G3,0=[(G24,0+12A2(G20,4-G20,3)+(+l4,1)g24,1-(+l3,1)g23,1)/]12(10)(8)Gi,j=Gi,j-1+gi,j(11)G4,0=G0,4;G0,2=G0,1-G1,0G0,3=G0,2-G2,0;G0,4=G0,3-G4,0(12)(G0,1,G0,1),,.33.1,132[24],2,CTIP,,,23.23.23.2.12,.,(3),[57].,3,.3,X011201190126m,0102m,012m.(01002,01035).19862,.3.2.245,,.,4151,:(a)(b)5,=90,60120-60-120.3.3245:,23.,.,,60120-60-120,,,.,.,,.6,82,.,47.60120-60-12038,81%.:,,6,.4(1):,,,2.(2),60120-60-120,,,.(3).:[1].[M].:,1989.[2],,.FORTRAN77[Z].:,1993.[3],.FORTRAN77[M].:,1990.[4],.[M]..:,2001.[5],,.[M].:,1989.[6].[M]..:,2001.[7],.FORTRAN[M].:,1997.()2537