pvc管道,糙率n=0.011,dn
200pvc管道滚改的摩阻 S1=10.3n^2/d^5.33=10.3*0.011^2/0.2^5.33=6.62
1公斤压力相当于水头H1=10米,流肆燃量 Q1=(H1/S1L)^(1/2)=[10/(6.62*100)]^(1/2)=0.123 m/s
100pvc管道的摩阻 S2=10.3n^2/d^5.33=10.3*0.011^2/0.1^5.33=266.5
6公斤压力相当于大雹判水头H2=60米,流量 Q2=(H2/S2L)^(1/2)=[60/(266.5*100)]^(1/2)=0.0474 m/s