管路流体流动阻力的测定 数据处理.doc

表1 光滑管数据表光滑管内径：8mm管长：1.698m液体温度：（29.4。C+30.1。C）/2=29.8。C液体密度：995.6kg/m3液体粘度： 0.800410-3Pa S序号流量（L/h）直管压差PP流速uRe（kPa）mmH2O（Pa）（m/s）1100-127.01231.90.555473.0630.0392150-257.02492.90.838259.350.03432506.00-60001.3913831.920.029435010.49-104901.9319205.480.027545016.44-164402.4924778.050.025655022.98-229803.0430251.110.024765031.43-314303.5935724.180.023875040.94-409404.1741495.770.022985050.92-509204.7046769.820.0221095061.45-614505.2552242.880.021对于序号6（即流量为550L/h）： P=22.98*1000=22980Pa流速u=qv/S=(550/3600000)/(0.25*0.0082)= 3.04m/s=0.008*3.04*995.6/ (0.8004*10-3) = 30251.11hf=P /=22980/995.6=23.08 m=2dhf/(Lu2)=2*23.08*0.008/ (1.698*3.042) = 0.024图1 光滑管LogLogRe 曲线图表2 粗糙管数据表光滑管内径：8mm 管长：1.698m 液体温度：（30.1。C+30.3。C）/2=30.2。C 液体密度：995.6kg/m3液体粘度： 0.800410-3Pa S序号流量（L/h）直管压差PP流速uRe（kPa）mmH2O（Pa）（m/s）190-256.82491.00.323184.3280.37220010.41-104100.727164.7380.16330019.99-199901.0610548.090.11440030.90-309001.4114030.940.083550044.69-446901.7717613.310.067660063.65-636502.1221096.170.056770083.86-838602.4824678.540.0478800106.88-1068802.8328161.40.0419900134.18-1341803.1831644.260.037101000162.58-1625803.5435226.630.033对于序号6（即流量为600L/h）： P=63.65*1000=63650Pa流速u=qv/S=(600/3600000)/(0.25*0.0102)= 2.12m/s=0.008*2.12*995.6/ (0.8004*10-3) =21096.17hf=P /=21096.17/995.6=21.19m=2dhf/(Lu2)=2*21.19*0.008/ (1.698*2.122) = 0.056图2 粗糙管LogLogRe 曲线图表3 局部阻力实验数据表序号流量Q（L/h）近点压差P近/kPa远点压差P远/kPa局部阻力压差P局部阻力/Pa流速u（m/s）阻力系数11002.052.0820200.18125.242422008.268.3881400.31170.1556330018.0418.21178700.47162.5077440031.4831.65313100.63158.47550048.5149.09479300.79154.276660070.0470.4696800.94158.4155770094.7495.48940001.10156.05868800123.38124.581221801.26154.59819900154.08155.381527801.41154.3737101000191.48192.981899801.57154.8295（局部阻力管阀门半开）对于序号7（即流量为700L/h）： P局部阻力=(2*94.74-95.48)*1