化工原理实验流量计校核实验报告化工原理实验-流量计校核实验报告化工原理实验-流量计校核实验报告流量计校核一、实验操作熟悉实验装置,了解各阀门的位置及作用。对装置中有关管道、导压管、压差计进行排气,使倒U形压差计处于工作状态。对应每一个阀门开度,用容积法测量流量,同时记下压差计的读数,按由小到大的顺序在小流量时测量8-9个点,大流量时测量5-6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。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、数据处理数据记录计量水箱规格:长400mm;宽300mm管径d(mm):25孔板取喉径do(mm):15.347查出实验温度下水的物性:密度查出实验温度下水的物性:密度p=996.2542kg/m3数据处理粘度卩=0.000958PaSRedu£4V■d4V■-心dRedu£4V■d4V■-心dV=UoAg二CoAo..2:p/s流速V/ms流速V/m?s-1空流系数C0雷min66.366.3Qv=h.S/tV=4qvnd2V=C.Rmax19.057.8129.662.70.3314017.70().02185.45E-044.4721.756234.164.10.34116.36().02024.92E-044.0321.663340.366.10.2584014.80().01824.56E-043.7391.663444.466.30.2194013.40().01654.13E-043.3851.634548.466.90.1853610.90().01343.73E-043.0601.607652.567.10.1464011.80().01453.63E-042.9811.762756.566.40.099419.26).01142.78E-042.2821.639860.565.70.052407.00).00862.16E-041.7681.752163.365.30.02404.950.00611.52E-041.2511.997259.465.70.063417.950.00982.39E-041.9601.763356.466.20.098409.480.01172.92E-042.3951.728451.966.40.1454011.02().01363.39E-042.7841.651545.365.40.2014013.800).01704.25E-043.4861.757640.765.20.2454013.680).01694.21E-043.4561.577737.065.00.284015.750).01944.85E-043.9791.699832.165.20.3314116.400).02024.93E-044.0421.587927.163.90.3684017.300).02135.33E-044.3711.627文丘里流量计R-Qv双对数坐标图IgQv-1.000-1.200y=2.233x+7.302-1.000-1.200y=2.233x+7.302-1.400-1.600-1.800■111111-0.800—”-4.100-4.050-4.000-3.950-3.900-3.850-3.800-3.750-3.7-3.650-2.000文丘里流量计C0-Re单对数坐标图2.500y=-0.4311X+y=-0.4311X+3.66694.204.304.404.504.604.704.80C2.000TOC\o1-5\h\z1.500-1.000-0.500-0.000-4.10IgRe3■结果分析C。由孔板锐口的形状、测压口位置、孔径与管径之比和雷诺数Re所决定。根据上图得当Re数增大到一定值后,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。