Appendiks Aliran Fluida 2.docx

APPENDIKS A.

Data pengamatan Tabel A.1 Venturi-meter

1

Bukaan valve (%) 1

2

3

1,20

39

18

231

271

40

3

5

1,45

39

18

249

151

98

Q (dm3/s)

D0 (mm)

D1 (mm)

0,25

22

39

206

199

7

Variabel

h1 h2 ∆h (mm) (mm) (mm)

Q (dm3/s)

D1 (mm)

D2 (mm)

0,65

39

18

203

196

7

Tabel A.2 Orrifice-meter

1

Bukaan valve (%) 1

2

3

1,15

22

39

230

173

57

3

5

1,45

22

39

252

154

93

Q (dm3/s)

D (m)

h1 (mm)

0,70

0,0381

202

197

5

Variabel

h1 h2 ∆h (mm) (mm) (mm)

Tabel A.3 Pitot-tube

1

Bukaan valve (%) 1

2

3

1,15

0,0381

203

197

6

3

5

1,50

0,0381

203

197

6

Variabel

h2 ∆h (mm) (mm)

B.

Contoh Perhitungan Venturi Meter Variabel

∆h (m)

Qp (dm3/s) 0,65 1,20 1,45

1 2 3

0,007 0,040 0,098

A V (m2) (m/s) 1,5260×10-4 1,3457 1,5260×10-4 3,2168 1,5260×10-4 5,0353

Diketahui: ρraksa = 13600 ρfluida = 1000

kg⁄ 3 m

kg⁄ 3 m

g

= 9,8 m⁄s2

D1

= 39 mm

D2

= 0,039 m

= 0,018 m

1 2 πd 4 1 = ×3,14×(0,018 m)2 4

A=

= 1,5260×10-4 m2 = 0,0001526 m2 ∆P = ∆h(PA -ρ)g = 0,007 m (13600 = 0,007 m (12600 = 864,36

V2 =

kg kg m -1000 3 ) 9,8 2 3 m m s kg m3

) 9,8

m s2

kg ms2

1 D [ 1-( D2 )4 ]½

×[

2(P1 - P2 ) ½ ] ρfluida

1

=

= 18 mm

1 [ 1-(0,4615)4 ]½

×[

kg ) ms2 ]½ kg 1000 3 m

2(864,36

Q (dm3/s) 0,2053 0,4908 0,7683

=

1 m ×1,31480 0,9770 s

= 1,3457

m s

Q = A×V = 0,0001526m2 ×1,3457 =2,0535 ×10-4

m s

m3 s

dm3 = 0,2053 s

Orrifice Meter Variabel 1 2 3

Q (dm3/s) 0,25 1,15 1,45

∆h (m)

0,007 0,057 0,093

A (m2) 3,7994×10-4 3,7994×10-4 3,7994×10-4

V (m/s) 0,84602 2,41416 3,08369

Diketahui: ρraksa = 13600 ρfluida = 1000

kg⁄ 3 m

kg⁄ 3 m

g

= 9,8 m⁄s2

D1

= 39 mm = 0,039 m

1 2 πd 4 1 = ×3,14×(0,022 m)2 4

A=

= 3,7994×10-4 m2 = 0,00037994 m2 ∆P = ∆h(PA -ρ)g

D0

= 22 mm = 0,022 m

Qp (dm3/s) 0,32 0,92 1,17

= 0,007 m (13600 = 0,007 m (12600

=

=

kg m3

) 9,8

m s2

kg ms2

= 864,36

V0 =

kg kg m -1000 ) 9,8 m3 m3 s2

Co 2(P1 - P2 ) ½ ×[ ] D ρfluida [ 1-( D0 )4 ]½ 1 0,61

[ 1-(0,564)4 ]½

×[

kg ) ms2 ]½ kg 1000 3 m

2(864,36

0,61 m ×1,31480 0,9480 s

= 0,84602

m s

Q = A×V = 0,00037994 m2 ×0,84602 = 3,21436×10-4

m s

m3 s

dm3 = 0,321436 s

Pitot Tube

Variabel 1 2 3

Qp (dm3/s) 0,70 1,15 1,50

∆h (m)

0,005 0,006 0,006

A (m2) 6,837×10-4 6,837 ×10-4 6,837×10-4

V (m/s) 1,1112 1,2172 1,2172

Q (dm3/s) 0,7597 0,8321 0,8321

ρraksa = 136 00

kg⁄ 3 m ρfluida = 1000

kg⁄ 3 m

g

= 9,8 m⁄s2

D1

= 1,5 inchi = 0,0381m

1 2 πd 4 1 = ×3,14×(0,0381 m)2 4

A=

= 6,8370×10-4 m2 = 0,0006837 m2 ∆P = ∆h(PA -ρ)g = 0,005 m (13600 = 0,005 m (12600 = 617,4

V0 = [

kg kg m -1000 3 ) 9,8 2 3 m m s kg m3

) 9,8

kg ms2

2(P1 - P2 ) ½ ] ρfluida

kg ) ms2 ]½ =[ kg 1000 3 m m =1,1112 s 2(617,4

Q = A×V = 0,0006837 m2 ×1,1112 = 7,597×10-4 dm3 = 0,7597 s

m3 s

m s

m s2