2.1概述 儿月 8+0 d πdg ,2=Kq,2 H=B+Aqy2 管路特性曲线方程 B=4 852分22 820+∑1， pg π2dg π2dg π2gd 2.1 概述 2 v 2 4 2 2 f q l u l H d g d g                                 = + = +                           2 2 2 4 v v 8( ) l d q Kq d g      +   = =        管路特性曲线方程 2 H B Aq = + v B g  = p 2 4 2 4 2 8( ) 8( ) 8 e 5 l l (l+ l ) d d K d g d g g d         + + ===   