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遇到如下问题不知该如何计算
" B/ n5 G" ]- C请达人指教
$ s& l& [, w" h) y+ K- Q' Mhave some requests more about needle valves : R y) @: Q! c# N1 c
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1 – What is the hole diameter the needle valves needs for a flow rate of 2500 litres/hour with a pressure of 4.2 bars.
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* ]- o1 M* u: z1 u2 – what is the flow rate for a hole diameter of 6.8mm with a pressure of 4.2 bars
4 n+ Z0 {3 b& q what is the flow rate for a hole diameter of 8mm with a pressure of 4.2 bars( C- u) q: C6 Q: u, e0 I% I3 N* G
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& d4 Q7 t) |, k& r1.压力为4.2BAR，CV值是2500L/H的情况下，孔径是多少。7 u- l" s" H( ]8 s5 F. P' Z8 {" e1 w
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2．压力为4.2BAR，孔径为6.8MM，CV值是多少7 x' b# F/ T( C) C; v' q+ C3 j9 E$ H4 w
# S) v; U4 h* m+ e1 _4 B9 v 压力为4.2BAR，孔径为8MM，CV值是多少0 ^, ^8 E+ M2 X( V7 s
! |8 y& V! D6 g# k/ y[ 本帖最后由 userkypdy 于 2007-3-20 19:52 编辑 ] |
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发表于 2006-4-25 17:47:12