考虑有局部水头损失,管道计算长度采用L=70m,流量 Q=0.4m^3/s
管道的比阻s=h/(LQ^2)=1/(70*0.4^2)=0.0892
管径 D=(10.3n^2/s)^(1/5.33)=(10.3*0.013^2/0.0892)^(1/5.33)=0.478 m
可采用管径 D=500mm
管内流速 V=4Q/(3.1416D^2)=4*0.4/(3.1416*0.5^2)= 2.04 m/s
回补充:按管道350米计
管道的比阻s=h/(LQ^2)=1/(350*0.4^2)=0.01785
管径 D=(10.3n^2/s)^(1/5.33)=(10.3*0.013^2/0.01785)^(1/5.33)=0.6462m
可采用管径 D=650mm
管内流速 V=4Q/(3.1416D^2)=4*0.4/(3.1416*0.65^2)= 1.21 m/s
考虑有局部水头损失,管道计算长度采用L=70m,流量 Q=0.4m^3/s
管道的比阻s=h/(LQ^2)=1/(70*0.4^2)=0.0892
管径 D=(10.3n^2/s)^(1/5.33)=(10.3*0.013^2/0.0892)^(1/5.33)=0.478 m
可采用管径 D=500mm
管内流速 V=4Q/(3.1416D^2)=4*0.4/(3.1416*0.5^2)= 2.04 m/s
补充:按管道350米计
管道的比阻s=h/(LQ^2)=1/(350*0.4^2)=0.01785
管径 D=(10.3n^2/s)^(1/5.33)=(10.3*0.013^2/0.01785)^(1/5.33)=0.6462m
可采用管径 D=650mm
管内流速 V=4Q/(3.1416D^2)=4*0.4/(3.1416*0.65^2)= 1.21 m/s