坡度0.0023，管径为500，流量、流速怎么算，按雨水管满流设计

Question

如题所述

Answer 1

过流面积 A=3.1416D^2/4=3.1416*0.5^2/4= 0.196m^2
水力半径 R=D/4=0.5/4= 0.125m
管内壁糙率 n=0.014
流量 Q=AR^(2/3)I^(1/2)/n
=0.196*0.125^(2/3)*0.0023^(1/2)/0.014
=0.168 m^3/s
流速 V=Q/A=0.168/0.196=0.86 m/s

Answer 2

根据管材定n 不一定是0.014