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1、序号名称图形局部阻力系数1圆形渐扩管A1/A01015202530451.250.010.020.030.040.050.061.500.020.030.050.080.110.131.750.030.050.070.110.150.202.000.040.060.100.150.210.272.250.050.080.130.190.270.342.500.060.100.150.230.320.402突然收缩与突然扩大A1/A00.00.10.20.30.40.50.60.70.80.91.00.500.470.420.380.340.300.250.200.150.090.00A0/A1

2、0.00.10.20.30.40.50.60.70.80.91.01.000.810.640.490.360.250.160.090.040.010.003减缩管A1/A010.0015.0020.0025.0030.001.250.220.270.310.360.401.500.310.390.450.510.571.750.430.530.610.700.772.000.560.690.800.911.014侧孔吸风A2/A1L2/L00.10.20.30.40.500.10.81.31.41.41.40.2-1.40.91.31.41.40.4-9.50.20.91.21.30.6-21

3、.2-2.50.31.01.2A2/A1L2/L00.300.200.300.4010.10.1-0.1-0.8-2.60.20.10.20.01-0.60.40.20.30.30.20.60.20.30.40.45伞形罩1020304090120150圆形0.140.070.040.050.110.200.30矩形0.250.130.100.120.190.270.376圆(方) 弯管r/d3060901201501800.750.250.400.500.500.500.501.000.130.200.250.290.330.351.250.100.160.200.230.260.281.5

4、00.080.130.170.200.230.252.000.080.110.150.170.190.213.000.050.090.120.150.150.176.000.030.060.070.090.100.117矩形弯管=A (-圆、方弯管的值,见上表)a/b0.250.500.801.001.251.501.752.002.503.003.50A1.801.501.171.000.800.700.570.480.400.370.338通风机出口变径管0A0/A11.502.002.503.003.504.0010.000.080.090.100.100.110.1115.000.10

5、0.110.120.130.110.1520.000.120.140.150.160.170.1825.000.150.180.210.230.250.2630.000.180.250.300.330.350.3535.000.210.310.380.410.430.449喇叭形 吸气口Vd30456090120ABABABABAB0.050.800.350.750.300.650.300.600.350.550.400.100.550.250.450.200.400.180.400.250.400.300.200.350.200.300.160.220.150.220.220.250.300

6、.300.300.150.200.150.200.130.200.200.250.300.600.150.120.130.080.130.120.150.150.200.251.000.100.100.100.050.100.100.130.100.150.2510压出四通V2/V10.600.801.001.201.401.60干管1000000支管21.000.400.200.100.050.0011吸入四通V2/V10.600.801.001.201.401.60干管10.400.350.200.100.000.005伞形罩支管2-1.80-0.700.000.100.250.3512吸

7、气三通干管1A2/A3L2/L10.200.400.600.801.001.201.401.601.802.000.200.402.103.705.206.607.809.0011.0011.0012.000.30-0.210.541.201.802.302.703.103.703.704.000.40-0.330.210.620.961.201.501.702.002.002.100.50-0.380.050.370.600.790.931.101.201.201.300.60-0.41-0.020.230.420.550.660.730.800.850.880.80-0.44-0.100.110.240.330.390.430.460.470.481.00-0.46-0.140.050.160.230.270.290.300.300.2913风管入口(装设孔板)A1/A20.49.610.63.080.81.171.00.4814风管入口(装设圆形排风罩)20.00.0240.00.0360.00.0590.00.11120.00.2015风管入口(

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