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:1000-2243(2005)02-0240-04V,,(,350002):V,.,,.,,.:V;;;;;:TU991.32:AAdiscussionofdistributinguniformityinenteringtrenchofVshapefilterCHENJin-zhui,CHENShui-di,XIEShan-bin(CollegeofCivilEngineeringandArchitecture,FuzhouUniversity,Fuzhou,Fujian350002,China)Abstract:ThewaterlevelofdistributiontrenchofVshapefilterfluctuateswiththefrictionalenergylossedandchangedofflowvelocityenergy.Thesecausefilterdistributionasymmetry.Basedonhy2dromechanicsprinciples,deducedcalculatingformulasandmadeaquantitativeanalysisofdistributingu2niformity.Accordingtothefluctuationofwaterlevelindistributiontrench,itwaseasytoreckontheval2ueofadjustingweirpeaklevel,andtoregulateittoremarkablyimprovedistributinguniformityoffilter.Keywords:Vshapefilter;trenchweir;distributingwater;uniformity;energy;adjustmentV[1]..(),.,,.V,,,1030mm..11Fig.1Fluctuationofflowenergyindistributionslot(),,.1,,.Vb,Hb,,He.,(,),,.hf,:2004-05-14:(1982-),,;:,.:(02058)332()Vol.33No.220054JournalofFuzhouUniversity(NaturalScience)Apr.2005:Hb+bV2b2g=He+hf()Hb+bV2b2g=He+hf():He-Hb=bV2b2g-hf:bV2b2g-hf=h:He=Hb+h:hf,h,.h=bV2b2g-hf=0,,2.,HeHb,,[2,3]:=qbqe=HbHe=HbHb+h=11+hHb(1)2V30t,8%,14,2,7,b=1.60m,H=1112m,l=9.70m,2.2Fig.2Horizontalplangraphicalplot&profilegraphicalplotofdistributiontrench:Q=1230100001.08/24/3600=1.875m3/s:A=bH=1.601.12=1.792m2:=b+2H=1.60+21.12=3.84m:R=A=1.7923.84=0.467m:V=Q/A=1.046m/s:q=Q/7=1.875/7=0.268m3/s76,l=9.70m.j,23,1q,j:Qj=Q-jq=Q-jQ7=1-j7Q(2),,:1422,:V3Fig.3FluctuationofwaterlevelofdistributiontrenchVj=QjAj1-j7Q/A=1-j7V(3):hfj=V2jC2jRjlV2jC2Rl=n2V2jR4/3l=0.00453V2j=0.004531-j72V2=0.004531-j721.0462=4.9610-31-j72(m)(4),1q,:hVj=V2j-1-V2j2g=1-j-172V2-1-j72V22g=(15-2j)1.0462492g=1.1410-3(15-2j)(m)(j=1,2,3,,7)(5)32j:hj=12hV(j-1)+hVj-hfj(6)(4)(6),1.1Tab.1TheComputingresultofdifferenceofwaterlevel(,)j1234567hfj/mm3.642.531.620.910.400.109.20hvj/mm14.8212.5410.267.985.703.421.1455.86hj/mm10.048.877.505.934.162.1838.68hj/mm10.0418.9126.4132.3436.5038.68h/mm0.0010.0418.9126.4132.3436.5038.681,,;,,,.Q0=0.268m3/s,A=0.60.6=0.36m2,Q0=A2gH,:H=Q202g2A2=0.26829.80.6120.362=0.07356m=73.56mm:=q7q1=HH+h7=73.5673.56+38.68=81.0%,1,1,.,.,T,,242()33,.[4],0018,,0.050.15,.0.951.08,1,.,,H(2),.3,.,,,.,,,,.,,.,:;;;;;,.:[1].[M].1.:,1995.288-289.[2],.[M].4.:,1999.337-338.[3],,,.V[J].,2002,28(11):12-15.[4],.[M].4.:,1999.123.(229):[1],.[J].,1995(1):40-43.[2],,,.(2000-2020)[R].:,2000.[3],,,.2000[R].:,1985.[4],.[M].:,1987.3422,:V