离心泵抽水量q=5.56L/s,安装高度Hs=5.75m,吸水管直径d=100mm,Hw=0.25m,试求真空度?

问题描述:

离心泵抽水量q=5.56L/s,安装高度Hs=5.75m,吸水管直径d=100mm,Hw=0.25m,试求真空度?

v=q/s=5.56*1000/(3.14*50*50)=0.708 m/s
Hx=Hs-Hw-(v*v/2g)
Hx=5.75-0.25-[0.708*0.708/(2*9.8)]=5.47m