流体流动阻力的测定数据处理

1、五.实验数据记录与处理光滑管径1.5m粗糙管径1.5m层流管1m温度25C1.实验数据记录表表1截止阀的相关原始数据截止阀27*3.0序一号进口温度/C水流量m3/h功率/KW进口表压/m出口表压/m压降/kpa124.34.740.83-0.216.526.88224.44.360.67-0.214.122.89324.33.980.52-0.111.819.26424.53.580.40-0.19.715.96524.53.200.320.07.812.91624.62.810.240.06.210.15724.72.400.180.14.67.59824.61.990.140.13.35

2、.30表2球阀的相关原始数据球阀27*3.0序号进口温度/C水流量m3h功率/KW进口表压/m出口表压/m压降/kpa124.74.710.81-0.316.50.64224.84.340.66-0.214.00.54324.93.960.53-0.111.80.45424.93.580.41-0.19.70.35525.03.170.310.07.80.25625.12.790.240.06.10.15725.12.390.180.14.70.08825.01.980.130.13.30.08表3光滑管的相关原始数据光滑管27*3.0序号一进口温度/C水流量m3/h功率/KW进口表压/m出口

3、表压/m压降/kpa125.37.340.92-0.812.57.08225.46.770.75-0.710.76.11325.46.200.59-0.69.05.16425.55.590.46-0.47.44.25525.74.970.34-0.36.03.39625.74.360.25-0.24.72.62725.83.740.18-0.13.61.90825.83.140.140.02.61.27表4粗糙管的相关原始数据粗糙管27*3.0序一号进口温度/C水流量m3/h功率/KW进口表压/m出口表压/m压降/kpa126.17.460.93-0.912.28.30226.26.890.7

4、4-0.710.57.09326.36.280.56-0.68.92.92426.45.690.42-0.47.34.83526.45.080.32-0.35.93.81626.44.440.26-0.24.62.89726.53.810.19-0.13.52.05826.53.190.090.02.61.31表5突扩管的相关原始数据突扩管27*3.0-48*3.0序号一进口温度/C水流量m3/h功率/KW进口表压/m出口表压/m压降/kpa126.65.460.81-0.415.50.80226.75.040.64-0.313.30.64326.84.600.49-0.211.20.4742

5、6.84.150.37-0.29.20.32526.93.700.24-0.17.40.16627.03.240.210.05.90.09727.02.740.140.04.40.09827.02.260.100.13.20.08表6孔板的相关原始数据孔板DN25序号一进口温度/C水流量m3/h功率/KW进口表压/m出口表压/m压降/kpa127.07.380.90-0.912.422.36227.26.800.70-0.710.619.30327.36.200.54-0.68.916.25427.45.610.41-0.47.413.46527.55.010.30-0.35.910.8462

6、7.64.400.22-0.24.78.41727.53.770.16-0.13.56.10827.73.160.110.02.64.04表7层流的相关原始数据层流6*1.5序号压降/kpa时间/s体积/ml10.559.84200.0020.559.47200.0030.560.00200.0040.559.66200.002.实验数据处理表及处理结果（由于数据较多，这里将孔板的处理数据省略）表8相关的处理数据表序号截止阀球阀光滑管粗糙管突扩管VgVgRe入光Re九粗Vg14.740.379524.710.0091521228450.005731248530.00655.460.008512

7、4.360.381984.340.0090951133050.005811153130.006515.040.0079933.980.38573.960.0091031037650.005851051040.003234.600.0070543.580.395033.580.008663935560.00593952300.00654.150.0058953.200.399943.170.00789283179.50.00598850210.006433.700.0037162.810.407772.790.00611372970.40.006743090.006393.240.0027272

8、.400.418012.390.00444362593.80.00592637650.006152.740.003881.990.424561.980.00647352552.10.00561533890.005612.260.00497表9层流管的处理数据表层流管6*1.5序号压降/kpa时间/s体积/ml流速ml/s10.559.84200.003.320.559.47200.003.430.560.00200.003.340.559.66200.003.43.以上数据的处理这里以光滑管为例：直管阻力摩擦系数尢的测定流体在水平等径直管中稳定流动时，阻力损失为湍流时的雷诺数为：duPRe=根

9、据以上数据这里只作出光滑管和粗糙管的Re九的的关系图图1兰话世AflU的关鸟旻由图可知：光滑管在湍流区雷诺数与阻力系数呈反比的关系，这与柏拉修斯式，顾毓珍等公式基本相符由图可知：粗糙管的阻力系数随着雷诺数的增大先增大后基本稳定的过程，由于本实验处在完全湍流区，区域内Re，对九均有影响，且随着由图可知：粗糙管的阻力系数随着雷诺数的增大先增大后基本稳定的过程，由于本实验处在完全湍流区，区域内Re，对九均有影响，且随着Re的增大,对九的影响越来越重要；相反，Re对九的影响越来越弱。可解释为，一定时，Re越大，则层流底层相对越薄；当Re增大到一定值后，几乎所有的粗糙峰均暴露在湍流主体区内，Re在大，九不变。1、水箱7、球阀8、光滑管9、粗糙管10、突扩管11、孔板流量计12、流量调节阀并SJ排空排入地沟并SJ排空排入地沟图1氧气吸收与解吸实验流程图1、氧气钢瓶9、吸收塔17、空气转子流量计2、氧减压阀10