1、、原始數據記錄：流體流動阻力的測定表一 原始數據記錄l=3md 光滑 =28mmd 粗糙 =26.6d 局部 =32mm原始數據記錄表光滑管粗糙管流量（L/S）壓差彎頭水溫流量壓差閥門（ kPa）水溫(kPa)(kPa)(L/S)(kPa)0.120.30.1128.700.250.0230.90.240.450.4528.70.141.050.0430.70.310.560.5628.70.271.980.0630.60.430.80.828.80.43.4140.130.60.541.081.0828.80.494.550.1430.60.671.421.4228.90.66.260.18

2、30.80.81.861.8628.90.78.170.2230.80.922.282.2828.90.8110.830.2730.81.052.852.85290.9213.690.3430.91.153.283.28291.119.220.4430.91.525.195.1929.31.3930.110.67311.917.687.6829.41.745.140.9731.12.310.6410.6429.41.9156.41.1831.12.7414.4114.4129.62.275.171.5531.13.0817.6417.6429.72.584.371.9631.2表二 物性數據表

3、平均水溫29.05粘度 0.8180mPa密度為 995.7平均水溫30.9粘度 0.7840mPa數據處理：表三 光滑管數據計算表光滑管流量（L/S）流速 （m/s）Re阻力（J/kg）摩擦系數 0.120.1956645.520.300.1480.240.39013291.030.450.0550.310.50417167.590.560.0410.430.69923813.100.800.0310.540.87729904.831.080.0260.671.08937104.141.430.02210.81.30044303.451.870.0210.921.49550948.962.2

4、90.0191.051.70658148.272.860.0181.151.86963686.203.290.0181.522.47084176.555.210.0161.913.103105774.487.710.0152.33.737127372.4110.690.0142.744.452151739.3014.470.0143.085.005170568.2617.720.013表四 粗糙管數據計算表粗糙管流量（L/S）流速（ m/s）Re阻力（J/kg）摩擦系 數0000.25100.140.2528515.091.0550.2940.270.48616421.961.9890.149

5、0.40.72024328.833.4290.1170.490.88229802.814.5700.1040.61.08036493.246.2870.0960.71.26042575.448.2050.0920.811.45849265.8710.8770.0910.921.65655956.3013.7490.0891.11.98066904.2719.3030.0871.392.50384542.6730.2400.0861.73.061103397.5145.3350.0861.913.439116170.1456.6440.0852.23.961133808.5475.4950.08

6、52.54.501152055.1684.7340.074局部阻力運算表：表五 彎頭阻力運算表彎頭流量（ L/S）流速 （m/s）阻力（J/kg）阻力系 數0.120.1490.119.910.240.2990.4510.140.310.3860.567.560.430.5350.805.6220.540.6721.084.810.670.8331.434.110.80.9951.873.770.921.1452.293.501.051.3062.863.361.151.4313.293.221.521.8915.212.921.912.3767.712.732.32.86110.692.61

7、2.743.40914.472.493.083.83217.722.41平均阻力系數 4.6101計算示例：（1） uhf2f（dup dl .d）表六 閥門阻力運算表閥門流量（L/S）流速 （m/s）阻力（ J/kg）阻力系 數000.0200.140.1740.042.650.270.3360.061.070.40.4980.100.810.490.6100.140.760.60.7460.180.650.70.8710.220.580.811.0080.270.530.921.1450.340.521.11.3680.440.471.391.7290.670.451.72.1150.97

8、0.441.912.3761.190.422.22.7371.560.422.53.1101.970.41平均阻力系數 0.6782V uS2）水平直管下：P所以：P2dlu23)光滑管 :u0.12 103.14 (28 10 324)Redu5)P2dlu0.19500.028 0.1950 31000 66740.8180 10 30.3 2 28 1000-3 0.1479995.7 3 0.19502 0.1479三、數據結果與分析：以 Re- 在雙對數坐標紙上繪圖如下：圖一 -Re 關系圖圖一為雷諾數 - 摩擦系數曲線，圖形分析： 雷諾數摩擦系數曲線中， 小流量數目較少，故過渡區下降階段點較少， 阻力平 方區內曲線較為理想。由計算得知，彎頭局部阻力系數平均數為 4.6101 ；閘閥局部阻力系數平均數為 0.6782 ；四、討論：1.進行測量前一定要