局部阻力系数

1、序号名称图形局部阻力系数1圆形渐扩管A1/A01015201.250.010.020.031.500.020.030.051.750.030.050.072.000.040.060.102.250.050.080.132.500.060.100.152突然收缩与突然扩大A1/A00.00.10.20.500.470.42A0/A10.00.10.21.000.810.643减缩管A1/A010.0015.001.250.220.271.500.310.391.750.430.532.000.560.694侧孔吸风A2/A1L2/L00.10.200.10.81.30.2-1.40.90.4-9

2、.50.20.6-21.2-2.5A2/A1L2/L00.300.2010.10.1-0.10.20.10.20.40.20.30.60.20.35伞形罩1020圆形0.140.07矩形0.250.136圆（方） 弯管r/d30600.750.250.401.000.130.201.250.100.161.500.080.132.000.080.113.000.050.096.000.030.067矩形弯管=A (-圆、方弯管的值，见上表）a/b0.250.50A1.801.508通风机出口变径管0A0/A11.502.0010.000.080.0915.000.100.1120.000.12

3、0.1425.000.150.1830.000.180.2535.000.210.319喇叭形 吸气口Vd30AB0.050.800.350.100.550.250.200.350.200.300.300.150.600.150.121.000.100.1010压出四通V2/V10.600.80干管100支管21.000.4011吸入四通V2/V10.600.80干管10.400.35支管2-1.80-0.7012吸气三通干管1A2/A3L2/L10.200.400.600.200.402.103.700.30-0.210.541.200.40-0.330.210.620.50-0.380.0

4、50.370.60-0.41-0.020.230.80-0.44-0.100.116圆（方） 弯管1.00-0.46-0.140.0513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（装设矩形排风罩）20.00.1340.00.0860.00.1290.00.19120.00.2716矩形断面直角弯头（小型叶片）0.3517矩形断面直角弯头（小型机翼型叶片）0.1018矩形断面直角弯头（一片大型叶片）0.5612吸气三通25304

5、50.040.050.060.080.110.130.110.150.200.150.210.270.190.270.340.230.320.400.30.40.50.60.70.80.91.00.380.340.300.250.200.150.090.000.30.40.50.60.70.80.91.00.490.360.250.160.090.040.010.0020.0025.0030.000.310.360.400.450.510.570.610.700.770.800.911.010.30.40.51.41.41.41.31.41.40.91.21.30.31.01.20.300.4

6、0-0.8-2.60.01-0.60.30.20.40.43040901201500.040.050.110.200.300.100.120.190.270.37901201501800.500.500.500.500.250.290.330.35局部阻力系数L2/L00L2/L010.200.230.260.280.170.200.230.250.150.170.190.210.120.150.150.170.070.090.100.110.801.001.251.501.752.002.503.003.501.171.000.800.700.570.480.400.370.332.503.

7、003.504.000.100.100.110.110.120.130.110.150.150.160.170.180.210.230.250.260.300.330.350.350.380.410.430.44456090120ABABABAB0.750.300.650.300.600.350.550.400.450.200.400.180.400.250.400.300.300.160.220.150.220.220.250.300.200.150.200.130.200.200.250.300.130.080.130.120.150.150.200.250.100.050.100.100.130.100.150.251.001.201.401.6000000.200.100.050.001.001.201.401.600.200.100.000.000.000.100.250.350.801.001.201.401.601.802.005.206.607.809.0011.0011.0012.001.802.302.703.103.703.704.000.961.201.501.702.002.002.100.600.790.931.101.201.201.300.420.550.660.730.800.850.880.240.330.390.430.460.470.48