管道水头损失计算

表五水管口径Ｄ流量Ｑ流速Ｖ水管底阀闸阀(全开)止回阀mm5075100125150200250300350400500口寸2″3″4″5″6″8″10″12″14″16″20″m3/h204580100150280486792126014402016L/s5.512.522.227.741.777.8135220350400560m/s2.82.822.82.272.362.452.753.113.3.182.85(每米)0.3780.2270.1570.0750.00.0480.0440.0440.0490.0310.01ξ=5ξ=0.1ξ=1.722.0321.31.41.51.92.51.351.030.830.040.040.040.0260.0280.030.0380.050.0670.050.040.680.690.680.440.470.510.650.851.130.850.68损 失 扬 程(ｍ)止回阀水管进口弯 管大小头出 口(淹没出流)ξ=0.5ξ=0.2ξ=0.5ξ=0.2ξ=0.1ξ=0.1ξ=0.250.20.20.20.130.140.150.190.250.340.260.210.080.080.080.0520.0560.060.0760.10.0670.050.040.20.20.20.130.140.150.190.250.340.260.210.080.080.080.0520.0560.060.0760.10.0670.050.040.040.040.040.0260.0280.030.0380.050.0670.050.040.040.040.040.0260.0280.030.0380.050.0670.050.040.10.10.10.0650.070.0750.0960.1250.170.1250.105ξ=1.00.40.4050.40.2630.2840.3060.3850.4930.6750.5150.414