3、常数3.3定义数组3.4计算过程3.5计算第一根鹤管OptionBase1PrivateSubCommand1_Click()'定义数据和数据输入Dimdd,D,ll,L,D0,ν,εH,εJ,aa,A,C1,C2,C3,ε,Δ,t,S,E,Fdd=Text5D=Text4D0=Text3N=Text1ν=Text2ll=Text8L=Text7L0=Text6S=Text10'系统常数εH=2*0.00015/ddεJ=2*0.00015/Daa=3.14*dd^2/4A=3.14*D^2/4C1=ll/(19.6*dd)C2=L/(19.6*D)C3=L0/(19.6*D0)'定义数组D
4、imQ0(50)DimV0(50)Dimλ0(50)DimRe(50)DimH0(50)AsString*5Dimvv(50,50)DimV(50,50)Dimλ(50,50)DimΛ(50,50)Dimqq(50,50)DimQ(50,50)DimReH(50,50)DimReJ(50,50)DimB(50,50)'计算过程qq(1,1)=0.01Δ=0.Fori=1To30'计算第一根鹤管Ifi<>1Thenqq(i,1)=qq(i-1,1)+(i-1)*ΔEndIfQ(i,1)=qq(i,1)vv(i,1)=qq(i,1)/aaReH(i,1)=vv(i,1)*dd/νIfReH(i,
5、1)<2000Thenλ(i,1)=64/ReH(i,1)ElseIfReH(i,1)<3000AndReH(i,1)>2000Thenλ(i,1)=0.16/ReH(i,1)^0.25ElseIfReH(i,1)<59.7/εH^(8/7)AndReH(i,1)>3000Thenλ(i,1)=0.3164/ReH(i,1)^0.25Elseλ(i,1)=(1/(-1.8*Log(6.8/ReH(i,1)+(εH/7.4)^1.11)/Log(10)))^2EndIf'计算第一段集油管V(i,1)=qq(i,1)/AReJ(i,1)=V(i,1)*D/νIfReJ(i,1)<2000Then
6、Λ(i,1)=64/ReJ(i,1)ElseIfReJ(i,1)<3000AndReJ(i,1)>2000ThenΛ(i,1)=0.16/ReJ(i,1)^0.25ElseIfReJ(i,1)<59.7/εJ^(8/7)AndReJ(i,1)>3000ThenΛ(i,1)=0.3164/ReJ(i,1)^0.25ElseΛ(i,1)=(1/(-1.8*Log(6.8/ReJ(i,1)+(εJ/7.4)^1.11)/Log(10)))^2EndIf'计算后面鹤管Forj=2ToNqq(i,j)=qq(i,j-1)Doqq(i,j)=qq(i,j)+0.00001vv(i,j)=qq(i,j)/
7、aaReH(i,j)=vv(i,j)*dd/νIfReH(i,j)<2000Thenλ(i,j)=64/ReH(i,j)ElseIfReH(i,j)<3000AndReH(i,j)>2000Thenλ(i,j)=0.16/ReH(i,j)^0.25ElseIfReH(i,j)<59.7/εH^(8/7)AndReH(i,j)>3000Thenλ(i,j)=0.3164/ReH(i,j)^0.25Elseλ(i