倒虹管水力计算

倒虹管水力计算备注管材（输入=引用）管径（m）水力坡降i充满度粗糙系数n充满角（以弧度计）水力半径湿周（m）流速（m/s）流量(m3/s)流量（L/s）上游管段PVC-U管、PE管0.50.001510.00956.2830.1251.5711.0190.2001200.121下游管段0.40.001510.00956.2830.1001.2570.8780.1104110.3740000.00950.000#DIV/0!0.000#DIV/0!#DIV/0!#DIV/0!0000.00950.000#DIV/0!0.000#DIV/0!#DIV/0!#DIV/0!管径（m）计算内径（m）流量(m3/s)水力坡降i流速(m/s）总水头损失H（m）根据公式i=a*Q^1.774/D^4.774;倒虹管内的流速应大于0.9m/s。倒虹管段0.40.20010.003941.590.424表4.2.3排水管渠粗糙系数1000i=3.94通过管渠类别粗糙系数管段长度（m）重力加速度g水温（输入=引用）水的运动粘滞系数v（m2/s）199.81201.004E-06h0管段0.0749大小平均弯头个数管段个数ah1进口0.0646PVC-U管、PE管0.0090.010.0095410.0008624688h2出口0.1293玻璃钢管0.0090.010.0095说明：本倒虹管计算的管径均按管道内径计算。h3弯头0.1551石棉水泥管、钢管0.0120.0120.012陶土管、铸铁管0.0130.0130.013混凝土管、钢筋混凝土管、水泥砂浆抹面渠道0.0130.0140.0135土明渠（包括带草皮）0.0250.030.0275浆砌砖渠道0.0150.0150.0150.43浆砌块石渠道0.0170.0170.017干砌块石渠道0.020.0250.0225水的运动粘滞系数温度（℃）粘滞系数v（m2/s）00.00000179250.000001520.43100.000001307150.000001139200.000001004300.000000801400.000000658600.000000475800.000000365轻工业部部SG78-80-75硬聚氯乙烯管的公称直径与计算内径关系公称直径（mm）外径Φ*壁厚（mm）计算内径（mm）200200*6188300315*9.5296400400*12376