2.1概述 q、 ∑H=∑ d 52=∑ 2 g 2g 8(+5) ∑ 8 A=Kq.2 H=B+Aq、2管路特性曲线方程 B pg 个、8x+582+25)821+2 丌ag I dg 丌g2.1 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         + + ===   