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1、流体流动过程机械能转换实验1. h1、h2变截面连续性方程（内径：d1=30mm，变截面外径d2=15mm）qvH1H2H1H2公式：序号流量L/H流速u 1(m/s)流速u2(m/s)U1d12*10(-4)U2d22*10(-4)u=111500.4521506641.8086026584.069355984.06935598qv/(/4)d228700.3420618071.3682472283.0785562633.078556263理论值：36400.2516316741.0065266972.2646850672.2646850674u1=u249500.3735157661.49
2、40630653.3616418973.361641897512300.4836046241.9344184954.3524416144.35244161462900.1140206020.4560824091.0261854211.026185421分析：流体为均质、不可压缩流体，连续性方程成立2. h1、h3流体经节流件后压头损失关系序号流量qv(L/H)流速u1(m/s)h1(cm)h3(cm)压头损失hf（cm）理论值hf（cm）111500.45215066496.2915.23.91148386628700.34206180798.795.33.42.23864055836400.
3、25163167410398.24.81.21145088249500.37351576698.494.442.669273489512300.48360462495.689.664.47461923762900.114020602101.8101.40.40.24873784分析：流速增大，压头损失增大，压头损失和速度的平方成正比3. h3、h4流体经弯头和流量计件后压头损失和位能变化关系序号流量qv(L/H)流速u1(m/s)h3(cm)h4(cm)位能差（cm）hf（cm）111500.4521506649121.369.73.91148386628700.34206180795.327
4、.268.12.23864055836400.25163167498.231.666.61.21145088249500.37351576694.425.668.82.669273489512300.48360462489.619.869.84.47461923762900.114020602101.420.680.80.248737844. h4、h5直管段雷诺数和流体阻力系数关系序号流量qv(L/H)流速U1(m/s)h4(cm)h5(cm)阻力系数=2hf/u2（10-2）Re=du/hf=h4-h5（cm）111500.45215066421.319.814.6742160213498
5、.305081.528700.34206180727.226.413.6744797110211.761240.836400.25163167431.630.825.269076417512.1002190.849500.37351576625.624.614.3354760311150.773761512300.48360462419.817.817.1032680514437.31761262900.1140206023635.2123.07031743403.9204120.8分析：Re足够大时，与Re无关，只与流体流速平方成正比5. h5、h6单管压力计h5处中心点速度序号流量qv(L/H)流速u1(m/s)h5(cm)h6(cm)hf=h6-h5u（m/s）=(hf*2g)(0.5)111500.45215066419.822.32.50.728700.34206180726.427.410.44271887236400.25163167430.8310.20.19798989949500.37351576624.625.81.20.484974226512300.48360462417.821.43.60.8462900.11402060235.236.41.20.484974226