帳ϴ.
ù° pipe, frictionless, T ϴٰ
P1, v1 Ĵ P2, v2 (Pressure, velocity)
Friction P = 0
, v1=v2=v .
flow rate(kg/s) .
ι° . pipe, friction , T ̶ .
P1, v1 Ĵ P2, v2 (Pressure, velocity)
Friction P .
ư P drop, v . flow rate(kg/s) .
°, Orifice plate
P1, orifice P2, ȸ P3
P1>P3>P2
P3 P ٽ pressure loss P1 Ȱ ʽϴ.
ٸ ȸ flowrate(kg/s) orifice ϱ ؼ
״. پ ؼ ñմϴ.
RO Control valve
RO hole ۰ Ͽ P ũ ְ, control valve closed position ̵Ͽ P ũ ༭
flow rate ٿִ ˰ ֽϴ.
ǿ ǰϸ orifice plate flowrate پ ٵ,
1,2° 쿡 غ friction loss pressure loss ־ v ״ο
flowrate ߱ orifice plate 쿡 flowrate ؾ մϴ.
پٸ
w= *v*A
(w=kg/s, =kg/m3, v=m/s, A=m2)
ؼ v پ flow rate پٴ ̾߱ ε,
v Ҵ friction ñմϴ.
ٸ friction ؼ P ϰ v ϴ ñմϴ.
ٸ 2° case friction ־ ұϰ P ϰ v Ͽµ
̰ Ǵ ñմϴ.
orifice , Ĵ flowrate ϴٸ,
RO C.V. flowrate ִ ñմϴ.
߿ Ʋ κ ִ
κ Ʋ ´° ˰ ͽϴ.
մϴ.