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.

, , .

A1, Orifice A0, A2

, P1, P2, V1, V2.

Orifice

.

Q Q = A1V1= A2V2.....(2)

(1)(2)

(3)

.

A2=CFA0, , (3)

P1

PCV

hh

P

t

Orifice Plate

P0

A1 A2(V1) (V2)

P2

2

P1 V12+ =

2g

P2 V22+ (1...........

1 - (A2/A1)2 (3......2g( P1 P2)Q = A2 -

1 - C2(A1/A2)2F = 1

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PFL(4)(5).

(5) Gallon/ Min, psi, in

(6)(Cv) Cv

.

F, c,

cF F. (6)

(4000) Fp=1, Fr=1 .

Cv(8),

.

(4.....................2g( P1 PCV)Q = CFA0 -

=FL2=P1- P2

P1- PCV

P

P1- PCV

.P (5............2gQ =FL

CFA0.

P (6)...........Q =FL

cFA0(38. ) G

(7...........

N1 : , 0.856Fp : ()Fr : ()Cv :

G : ()P : (/) Q : (/h)

PQ = GN1.Fp.Fr.Cv.

PQ = G0.856 Cv. PCv = G1.167. Q ....(8)

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