改后 粗糙管摩擦系数λ与雷诺数Re的测定 2.doc

表1 流体在光滑管摩擦系数与雷诺数Re的测定（在25时，水=997.02kg/m3，水=0.000895Pas）序号R正U/mh倒U/m流速u/（m3/s)直管损失Hf1/m流量qv/(m3/h)雷诺数Re压差P/Pa直管摩擦系数标准阻力系数绝对误差相对误差/%10.4780 0.4490 2.430 0.449 2.747 54144.352 4391.564 0.0199 0.0207 0.0008 3.99 20.1904 0.1978 1.534 0.198 1.734 34172.180 1934.636 0.0220 0.0232 0.0012 5.36 30.0762 0.0886 0.970 0.089 1.097 21618.059 866.576 0.0246 0.0261 0.0014 5.53 40.0294 0.0412 0.603 0.041 0.681 13428.048 402.968 0.0297 0.0294 0.0003 1.08 50.0130 0.0182 0.401 0.018 0.453 8929.166 178.010 0.0296 0.0325 0.0029 8.81 60.0050 0.0090 0.249 0.009 0.281 5537.634 88.027 0.0381 0.0366 0.0015 4.04 表2 流体在粗糙管摩擦系数与雷诺数Re的测定（在25时，水=997.02kg/m3，水=0.000895Pas）序号 正U型管压差计（流量） 倒U型管压差计（压强降）液体高度差R/m流量qv/(m3/h)流速u/(m/s)液体高度差h/m压差P/Pa雷诺数Re摩擦系数10.4780 2.747 2.430 0.8850 8655.978 54144.352 0.0392 20.1904 1.734 1.534 0.3576 3497.602 34172.180 0.0398 30.0762 1.097 0.970 0.1482 1449.510 21618.059 0.0412 40.0294 0.681 0.603 0.0610 596.627 13428.048 0.0439 50.0130 0.453 0.401 0.0276 269.949 8929.166 0.0450 60.0050 0.281 0.249 0.0138 134.975 5537.634 0.0584 表3 突然扩大管局部阻力系数的测定（在25时，水=997.02kg/m3，水=0.000895Pas）序号 正U型管压差计（流量） 倒U型管压差计（压强降）液体高度差流量qv流速u液体高度差压差阻力系数平均阻力系数标准偏差R/m/(m3/h)/(m/s)h/mP/Pa()10.4780 2.747 2.430 0.1684 1647.081 0.559 0.645 0.21320.3850 2.465 2.181 0.1352 1322.360 0.558 30.2868 2.128 1.882 0.1010 987.857 0.559 40.1960 1.759 1.556 0.0682 667.048 0.553 50.1004 1.259 1.114 0.0356 348.195 0.563 60.0050 0.281 0.249 0.0034 33.2551.080 光滑管误差分析表序号Er(R正U)Er(h倒U)Er(d)Er(d0)Er(l)Er()Er(R正U)2/Er()2Er(h倒U)2Er(d)2/Er()2Er(d0)2/Er()2Er(l)2/Er()210.0015 0.0016 0.025 0.0417 0.033 0.21 0.01%0.01%1.44%4.00%0.03%20.0037 0.0036 0.21 0.03%0.03%1.44%4.00%0.03%30.0093 0.0080 0.21 0.20%0.15%1.43%3.99%0.03%40.0241 0.0172 0.21 1.30%0.66%1.41%3.92%0.03%50.0544 0.0389 0.22 6.17%3.15%1.30%3.63%0.02%60.1414 0.0786 0.26 28.72%8.87%0.90%2.50%0.02%粗糙管误差分析表序号Er(R正U)Er(h倒U)Er(d)Er(d0)Er(l)Er()Er(R正U)2/Er()2Er(h倒U)2/Er()2Er(d)2/Er()2Er(d0)2/Er()2Er(l)2/Er()210.0015 0.0008 0.025 0.0417 0.0033 0.21 0.01%0.00%1.44%4.00%0.03%20.0018 0.0020 0.21 0.01%0.01%1.44%4.00%0.03%30.0025 0.0048 0.21 0.01%0.05%1.44%4.00%0.03%40.0036 0.0116 0.21 0.03%