化工原理实验流量计校核实验报告.docx

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1、一、试验操作流量计校核1. 生疏试验装置，了解各阀门的位置及作用。2. 对装置中有关管道、导压管、压差计进展排气，使倒 U 形压差计处于工作状态。3. 对应每一个阀门开度，用容积法测量流量，同时登记压差计的读数，按由小到大的挨次在小流量时测量 89 个点，大流量时测量 56 个点。为保证标定精度，最好再从大流量到小流量重复一次，然后取其平均值。4. 测量流量时应保证每次测量中，计量桶液位差不小于 100mm 或测量时间不少于 40s。二、数据处理1.数据记录计量水箱规格：长 400mm；宽 300mm管径 dmm：25孔板取喉径 d mm：15.3470查出试验温度下水的物性：密度 = 996

2、.2542 kg/m3粘度 = 0.000958 PaS 2.数据处理Re = du rm= d rm 4Vpd 2= 4V rpm dV = u A00= C A002Dp / r则C=0u02Dp / r孔板流量计试验数据处理左/cm右/cm R/m min57.057.0时间t/s水箱高度流量流速雷诺数h/cm体积V/m3Qv/m3s-1V/ms-1空流系数C0 Re4qvmax33.145.3Qv=h.S/tV= d 2V=C .02gRRe=dv/133.746.30.126406.70.0081932.05E-041.10780.704916916.60238.247.10.089

3、416.10.0074541.82E-040.98330.744515014.92340.648.80.082415.70.0070221.71E-040.92640.730714146.29442.548.90.064405.20.0064061.60E-040.86620.773413228.02543.849.40.056414.90.0060371.47E-040.79640.760112160.84645.650.30.047414.50.0055441.35E-040.73130.762011168.12747.951.30.034413.90.0048051.17E-040.63

4、380.77649679.04849.452.20.028413.50.0043121.05E-040.56880.76788686.32951.653.30.017412.90.0035738.71E-050.47130.81657197.23150.952.80.019403.00.0036969.24E-050.49980.81897631.55248.751.60.029413.70.0045581.11E-040.60130.79769182.68347.150.80.037404.00.0049281.23E-040.66630.782510175.40444.749.90.052

5、414.70.005791.41E-040.76380.756611664.48542.548.80.063415.20.0064061.56E-040.84510.760512905.39640.848.00.072415.60.0068991.68E-040.91010.766113898.11737.647.10.095416.30.0077621.89E-041.02390.750315635.37835.346.20.109416.90.0085012.07E-041.12140.767217124.45933.445.60.122406.70.0082542.06E-041.116

6、10.721817043.80lgQv孔板流量计R-Qv双对数坐标图-0.600-4.100 -4.050 -4.000 -3.950 -3.900 -3.850 -3.800 -3.750 -3.700 -3.650-0.800-1.000y = 2.233x + 7.302-1.200-1.400-1.600-1.800-2.000Rgl孔板流量计C0-Re图0C数系流空0.84000.82000.80000.78000.76000.74000.72000.70000.6800y = -0.2058x + 1.6043.83.944.14.24.3雷诺数的对数logRe文丘里流量计试验数据

7、处理左/cm右/cmin66.366.3ax19.057.8 R/m时间t/s水箱高度h/cm体积V/m3流量流速Qv/m3s-1V/ms-1空流系数 C雷诺数 Re04qvQv=h.S/tV=d 2V=C .02gRRe=dv/129.662.70.3314017.700.02185.45E-044.4721.75655449.87234.164.10.34116.360.02024.92E-044.0321.66350001.92340.366.10.2584014.800.01824.56E-043.7391.66346364.86444.466.30.2194013.400.01654

8、.13E-043.3851.63441979.00548.466.90.1853610.900.01343.73E-043.0601.60737941.22652.567.10.1464011.800.01453.63E-042.9811.76236966.58756.566.40.099419.260.01142.78E-042.2821.63928301.82860.565.70.052407.000.00862.16E-041.7681.75221929.33163.365.30.02404.950.00611.52E-041.2511.99715507.17259.465.70.063

9、417.950.00982.39E-041.9601.76324298.00356.466.20.098409.480.01172.92E-042.3951.72829698.57451.966.40.1454011.020.01363.39E-042.7841.65134523.03545.365.40.2014013.800.01704.25E-043.4861.75743232.10640.765.20.2454013.680.01694.21E-043.4561.57742856.17737.065.00.284015.750.01944.85E-043.9791.69949340.9

10、8832.165.20.3314116.400.02024.93E-044.0421.58750124.17927.163.90.3684017.300.02135.33E-044.3711.62754196.76lgQv文丘里流量计R-Qv双对数坐标图-0.800-4.100 -4.050 -4.000 -3.950 -3.900 -3.850 -3.800 -3.750 -3.700 -3.650-1.000-1.200y = 2.233x + 7.302-1.400-1.600-1.800Rg l-2.0002.5000C2.000文丘里流量计C0-Re单对数坐标图y = -0.4311x + 3.66691.5001.0000.5000.0004.104.204.304.40lgRe4.504.604.704.803.结果分析C0 由孔板锐口的外形、测压口位置、孔径与管径之比和雷诺数 Re 所打算。依据上图得当 Re 数增大到肯定值后， C0 不再随着 Re 而变，成为一个和孔径与管径之比有关的常数。