常用局部水头损失系数.doc

15局部水头损失15」局部阻力系数局部阻力系数见表15-1局部阻力系数«名称T图示6计:规格(mm)倔心渐编管渐放營渐缩管Dd100750.160.030.161501000.170.080+172001001500.1S0+170.190.060+190J71000,190+270.202501500.180・i92000.170+060471000.200,320-20异渐放—1V23001502002500+190J80.170.260360・D50.200\190.171500.200-300.20径渐缩•—3502002500.190-180.250.150.200.19h=亠1—叽3000.170-050+17管“q1—1500.200.330.212000-200.300,204002500」90.240.203000,180-13CL193500-170,040,17名称图示fE规格（mm）偲心渐缩管渐放管渐缩管Dd2500.200.320,213000.200.290+205003500490.210.2040010.180.120J94500」70*040J73000.210.340.213500.200.300,216004000,200.260.204500.190.180.205000,180,110*19异偲心渐缩4004500.210.200320.290,210.21y?-pH?700a—*5000.200.240.20—6000-180,100+19j4500-210,340,21注:管长L=2（D亠/）8005000.210.310.21管+150mm6000-200.210,207000」80-070.195000+210.340,226000.210.290.219007000.200.210.208000.180-080,195000.210+370,226000.210-330.2210007000+210.270.218000.200.180.209000.180.060,19总径比D~d流a(mA)0.60.9t・21-51-82-12.4343.64-56-09,012.1.20J10J00.10oao0,100,100,100.090*090*09呼0.090.01,40.260.260.250.240.240-240.240.230.230.220.220+210.2l+60,400,390,380-370+370.360.360,350-350-340・336320.31-80.51b・490.480.47>0+470-460,460-450.440.430.420.410*42,06600.580+56“55055CL546530*520.520.510-500-480.4#15局部水头损失#15局部水头损失名称究然縮小直径比0.60.9流速3(m/s)】・21.51.82J3.03.64,56.09.012.(名称LI】・2E43.61.82,02.22.53+04-05.010』gto.030-070.170.260.340.380.400.420.4』0,040.070J70-260.340,380.400+420.040.070.17CL260+34().370.400.420+040.070.170.260,340,37().(140-070-J70.040.040.070.070.170440.080U80,260.04CL080.040.080・050.090180,250-310+330.05000-100JI0.190-2(0.25().290.310330.340.360.370,380.400J70-26R).26K)+260,330.33)0.320360*390.4()卜42”・450,460J80J80.260.340.370.390.39+440.440.470.460.480.4&0.490,49CL480.490.460.47,0.480.0+480,0-410.430,460.47().41(L430.450.47.48.480,340.370.390.410制(M50.460.470.470-470,360+380.400.420.440.450.350.370.390+410.43(M50-460.46(0*470+470.460,250.320.34(L370.350,380・硕390.420.440.450.450.370.410+420.43().440.N0.2：0-2<0-3(0.310+3J0.340.3^0-410-3Sna101520253035404560e0.16Q+180-200,220.240.260.28().300.32a）肖//W24时疋二1卫也）.半//J<4时飞=0・巧15.1局部阻力系数名称图示带喇叭口的进口0.1进口没有修圆进口稍微修圆0-500,20-0,250.05-0.10逬口完全修圆流入明渠仍IS流人水箱（池）直流汇合Q^-Qr直流分支W/Q0.10.20-30.410-50-60-70.80.90.810.640.490,360,250.160-090.040,011.0Q^=Q支时•亀=】・5Q支=0时疋2=0」等径T字管转弯流」汕分支流ih1-5#15局部水头桢失名称图示异径丁字管等径丁宇管之f值+突放（或突缩）之£值0,050.15卜字管90。

弯管任意角度的弯管1.5g=2x丁字管之£值Rd0.5L01-52*0344.05.01-200.800.600.480.360.300-2920*30*4050“60*80*90fl100*120*140*160*180*0,400.55G.650.750.830.850.95L0051.13L201.271.33理）304『50'60'7(/80*90'e0.200.300.400.550.700*90E1015.1局部阻力系数名称图示15.1局部阻力系数名称图示a/d1.231,672.373.77f0.300.320.260.24钢制焊接弯管801001251502002503003500.260.320.330-360-360.440.390.4：cJ(mm)400450500600700800900100($0*450.510-480-510.516530.54(L%。