rumus aliran satu fasa

8/18/2019 Rumus Aliran Satu Fasa

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Rumus aliran satu fasa

Fasa gas :

Korelasi Weymouth

( ) ( )4221123.3 5.22/1

22

2/1

2 −

−

= D

L g T Z p p

f pbTbQh

τ

dimana :

Qh = flowrate, cuft/am.

!" = "ase tem#erature, $R.

%" = "ase #ressure, #sia.

%1 = te&anan awal, #sia.

%2 = te&anan a&hir, #sia.

' = inside diameter #i#a, in.

(g = )* gas.

! = tem#eratur alir rata+rata, $R.

F = mood friction factor.

3/-32.- L D

=

= #anang #i#a, mile.

= gas de0iation factor rata+rata.

ood Friction Factor f

( ) ( )52

/log214.1

12

−

−

=

Deturb f

F da#at dicari dengan Renold um"er Re :


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2.................................................................................46,-

2-Re

−=

=

D xu

g Qh

D xu

g mcfd q N

τ

τ

7e&asaran #i#a

e

d

8ntu& #ersamaan 1 dan 4 :

'engan cara !rial 9nd rror untu& menghitung Qh, ma&a f

menadi :

;2...........................................................................................32,-

3/1 −=

D f

)u"stitusi &e #ersamaan 3 :

62...........................................21

-2,16

2/13/122

−

−=

L g T Z

D P P

Pb

TbQh

τ

Korelasi Panhandle


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'imana :

Q = cuft/da #ada %" dan !"

ain = sama dengan emouth.

Modified Panhandle

112.............................................................................-15,-

-3


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'imana :

@% = %ressure dro# se#anang , #sig.A = densit fluida, l"/cuft.

f = friction factor, dimension less

= #anang #i#a, ft

B = &ece#atan aliran, ft/sec

' = inside diameter, ft

g = gra0it = 32 ft/sec2

2.2.2 Fanning

'imana :

fC = 1/4 f

f = mood friction factor

d = inside #i#a, in

*% = *alon #er menit

2.2. !a"en # William


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'imana :

d = in = ft% = #sig > = &onstanta roughness #i#a

*rafi& ang di"utuh&an :


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rumus aliran satu fasa

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