喷水系统枝状管道水力计算

1、喷水系统枝状管道水力计算节点管段特性系数B,Bg节点水压H（Mpa）流量管径DN（mm）管道比阻A（L/s）管段长度L（m）水头损失h(Mpa计算式节点q（L/s）管段Q（L/s）q²，Q²1234567891011120.18450.960.92q²=BH=0.184×5=0.92-0.960.92250.436731.2h-=AL-Q²-=0.4367×3×0.92=1.200.1846.231.071.14H=H+h-+hb-=5+1.20+0.03=6.23q²=0.184×6.23=1.14-2

2、.034.12320.093931.16Q-=Q-+q=0.96+1.07=2.03H-=0.0939×3×4.10=1.160.1847.421.171.36H=6.23+1.16+0.03=7.42q²=0.184×7.42=1.36-3.2010.24320.093932.90Q-=2.03+1.17=3.20h-=0.0939×3×10.24=2.900.18410.351.381.90H=7.42+2.90+0.03=10.35q²=0.184×10.35=1.90-4.5820.98400.04532.

3、83Q-=3.20+1.38=4.58h-=0.045×3×20.98=2.830.18413.211.562.43H=10.35+2.83+0.03=13.21q²=0.184×13.21=2.43-6.1437.70500.0111.80.75Q-=4.58+1.56=6.14h-=0.011×1.8×37.70=0.752.6414.286.1437.70H=13.21+0.75+0.32=14.28Bg-=Q²-/H=37.70/14.28=2.64-6.1437.70500.01131.24点无流出h-=0.011

4、×3×37.70=1.2415.5412.53H=14.28+1.24+0.02=15.54q=Q-=12.53侧支管-2.646.3940.70因Bg-=Bq-故Q-=-12.53157.00700.002931.36Q-=6.14+6.39=12.53h-=0.0029×3×157=1.3616.9219.21H=15.54+1.36+0.02=16.92q=Q-=19.21侧支管-2.646.6844.70Q-=-19.21369.00700.002933.20Q-=12.53+6.68=19.21h-=0.0029×3×369

5、=3.20H=16.92+3.20+0.02=20.14q=Q-=26.51Q-=2.53Q-=19.21+7.30=26.51h-=0.0012×3×702.77=2.5322.6930H=20.14+2.53+0.02=22.69q=Q-=30侧支管-2.643.49为使管系流量符合设计值30L/s，定点侧支管-流量为30-26.51=3.49-30900.00800.001233.24Q-=26.51+3.49=30h-=0.0012×3×900=3.2425.9530H=22.69+3.24+0.02=25.95-30900.001000.000

6、339.2810.60Q-=30,39.28=3+30+6.28,6.53=0.03=0.22=6.28 h-=0.0003×39.28×900=10.6043.0830H=25.95+10.60+6.53=43.08修改计算-19.21369.00800.001231.33h-=0.0012×3×369=1.3318.2726.12H=16.92+1.33+0.02=18.27侧支管-6.9148.50Q-=6.91-26.12681.001000.000330.61Q-=19.21+6.91=26.12H-=0.0003×3×681.00=0.6118.9030H=18.27+0.61+0.02=18.90侧支管-3.88100定分支流量为30-26.12=3.88-30900.000.000330.81Q-=26.51+3.88=30h-=0.0003×3×900=0.8119.7330100H=18.90+0.81+0.0