밸브_부분2
DESCRIPTION
밸브_부분2TRANSCRIPT
-
Cv
Cv
. ,
(8) .
(Fr: Reynollds Correction Factor) .
(7) Fr .
2000 ,
4000 , .
(9) [ ] FL Ball, Butterfly
1 . .
(10) (Rev) K
. Cv corr'= K.Cv,
.
(FL)
, , ,
Cv
.
, .
Fd : CD : Cv/D2 FL :
Rev = 76200 x Fd.Q ....(9)FL x Cv [ 0.00214
(FL + CD)+ 1 ]
1/4
r
....(10)Rev = 76200 xFL x Cvr
Fd.Q= 76200 x
Cvr
Q
P (11)...........Q = G0.856.Fc.Cv
-
(Vena Contracta) .
, .
.
(FL) .
1
2
3
4
5
10 2 3 4 5 7 9 102 2 3 4 5 7 9 103 2 3 4 5 7 9 104 2 3 4 5 7 9 105
(K)
Reynids number(Rev)
(P1 - P2) / (P1 - Pvc)FL =
FL : P1 : P2 : Pvc :
P1 P2
P1 P2
P
Pvc
PB
PGPVC
Pvc
P2P1
PV
Pvc P2
P1
PV
Pvc
P2P1
PV
Nomal Flow
Flushing Flow
Cavitation Flow