扬程

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扬程是单位重量液体通过泵所获得的能量。泵的扬程包括吸程在内,近似为泵出口和入口压力差。又称为水头(hydraulic head)或落差


扬程用H表示,单位为米(m)。泵的压力用P表示,单位为MPa(兆帕)


H=P/(ρg)


如P为1 kg/cm2,ρ(水)為1000 kg/m3


则H=(1 kg/cm2)/(1000 kg/m3)


H=(1 kg/cm2)/(1000 kg/m3)=(10000 kg/m2)/(1000 kg/m3)=10 m


1 MPa=10 kg/cm2


得H=(P2-P1)/(ρg) =ΔP/(ρg)


(P2=出口压力P1=进口压力ΔP=压力差)



參見


  • Borda–Carnot equation英语Borda–Carnot equation

  • Total dynamic head英语Total dynamic head

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註釋




  • Bear, J. 1972. Dynamics of Fluids in Porous Media, Dover. ISBN 0-486-65675-6.


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