文库摘要:
2-1 解:
(1)pA+γ水•ΔH=γH•Δh;所以
pA=γH•Δh-γ水•ΔH=38.02kPa(γH=13.6γ水)
(2)测压管长度:
pA=γ水•h 所以
h= pA/γ水=38.02×103/9.8×103=3.88m
2-3 解:
PA-γh=pB-γ(h1+h2+h)+γHh1
所以,pA-pB=γHh1-γ(h1+h2)=13.6×9.8×0.53-9.8×(0.53+1.2)
=53.68kPa
2-6
解:
pA=γH(h1+h2)-γ(h1+h2)=13.6××9.8××0.53-9.8×(0.53+1.2)=53.68kpa
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2-7 解:
(1)左支:
绝对:pc'=p0'+γh0=86.5+9.8×2=106.1kPa
(2)右支:
pc'=pa+γ水h; h=(pc'-pa)/γ水=(106.1-9.8)/9.8=0.827m
2-8 解:pA=0.6pa=0.6×98=58.8kpa
(1)左支:pA=γh1 h1=pA/γ=58.8/9.8=6m
(2)右支:pA+γh=γHh2 h2=(pA+γh)/γH=0.456m
2-10