8/9/2019 DataLab 2

1/9

Pitot Tube at 54 mm

Static `Pressure Reading

105mmTraverse

Position(m

m)

Stagnation

`Pressure

Reading(mm)

x

(mm)

p

(! m2

)

"

(! m2

)

#e$ocit%

(m!s)

0 86 19 146.68 12.4608 15.635810 80 25 193 16.3958 17.935620 8 25 193 16.3958 17.935630 80 25 193 16.3958 17.935640 80 25 193 16.3958 17.935650 81 24 185.28 15.74 17.573260 81 24 185.28 15.74 17.573270 81 24 185.28 15.74 17.573280 83 22 169.84 14.9283 16.8251

Pitot Tube at &'4 mm

Static `Pressure Reading

10mmTraverse

Position(m

m)

Stagnation

`Pressure

Reading(m

m)

x

(mm)

p

(! m2

)

"

(! m2

)

#e$ocit%

(m!s)

0 90 18 138.96 11.805 15.2189

10 80 28 216.16 18.3633 18.981320 80 28 216.16 18.3633 18.981330 80 28 216.16 18.3633 18.981340 81 27 208.40 17.7075 18.639250 81 27 208.40 17.7075 18.639260 81 27 208.40 17.7075 18.639270 82 26 200.72 17.0517 18.290880 83 25 193.00 16.3958 22.1472

8/9/2019 DataLab 2

2/9

Pitot Tube at 4 mm

Static `Pressure Reading

11* mmTraverse

Position(m

m)

Stagnation

`Pressure

Reading(m

m)

x

(mm)

p

(! m2

)

"

(! m2

)

#e$ocit%

(m!s)

0 94 22 169.84 14.4283 16.825110 84 32 247.04 20.9867 20.291820 80 36 277.92 23.61 26.576730 80 36 277.92 23.61 26.576740 80 36 277.92 23.61 26.576750 80 36 277.92 23.61 26.576760 82 34 262.48 22.2983 25.827970 90 26 200.72 17.0571 22.5858

80 92 24 185.28 15.74 21.6998

Pitot Tube at 154 mm

Static `Pressure Reading

1&&mmTraverse

Position(m

m)

Stagnation

`Pressure

Reading(m

m)

x

(mm)

p

(! m2

)

"

(! m2

)

#e$ocit%

(m!s)

0 106 16 123.52 10.4933 17.717810 88 34 262.48 22.2983 25.827920 86 36 277.92 23.61 26.576730 86 36 277.92 23.61 26.576740 85 37 285.64 24.2658 26.943350 85 37 285.64 24.2658 26.943360 84 38 293.36 24.9217 27.304970 86 36 277.92 23.61 26.576780 100 22 169.84 14.4283 20.7759

8/9/2019 DataLab 2

3/9

Pitot Tube at &5+4 mm

Static `Pressure Reading

1+0mmTraverse

Position(m

m)

Stagnation

`Pressure

Reading(m

m)

x

(mm)

p

(! m2

)

"

(! m2

)

#e$ocit%

(m!s)

0 110 20 154.40 13.1167 16.042110 96 34 262.48 22.2983 25.827920 92 38 293.36 24.9217 27.304930 92 38 293.36 24.9217 27.304940 94 36 277.92 23.71 26.576750 96 34 262.48 22.2983 24.8279

60 96 34 262.48 22.2983 24.827970 106 24 185.28 15.74 17.573280 118 12 92.64 7.87 15.3441

8/9/2019 DataLab 2

4/9

S,-P./ ,..,T23

X is determined by calculating the diference beteen the stagnati!n "ressure#x

1 and static "ressure# x

2

X=x1x

2

$!r e%am"le#

X=x1x

2

X=105mm86mm

& 19mm

" is determined by calculating the diference in "ressure using the '!rmula

p=7.72 (x1x2 ) cos ( hereby =0

$!r e%am"le#

p=7.72

(x1x2 )

p=7.72 (10586)

146.68 )* m2

+el!city is calculated by using the '!rmula# v=2 gh ' .

,n !rder t! calculate -el!city# h has t! be calculated /rst. he '!rmula t! calculate

h# head !' air#

h'=

k

airx

(x1x2 )1000

cos ( hereby =0

k=787 kg/m3

8/9/2019 DataLab 2

5/9

air=1.2kg /m3

$!r e%am"le#

h

'

=

787

1.2

19

1000

12.4608N/m2

ence#

v=2 (9.81 ) (12.4608 )

15.638m /s

ra"h !' +el!city -s ra-erse !siti!n

0 10 20 30 40 50 60 70 80

0

5

10

15

20

25

30

it!t tube 1

it!t tube 2it!t tube 3

it!t tube 4

it!t tube 5

Traverse Position

#e$ocit%

8/9/2019 DataLab 2

6/9

/P/R2-/T &

tatic ressure eadings hen using tandard )!le 80mm

amper 3penings (6 3penings)06 &56 506 56 1006

Points mm o7 8eroseneRoom

9pressure:

84 80 80 80 80

,7ter

no;;$e

80 81 82 81 82

54mm 81 82 83 82 83&'4mm 81 83 84 84 844mm 81 85 86 87 87

8/9/2019 DataLab 2

7/9

amper 3penings (6 3penings)06 &56 506 56 1006

Points mm o7 8eroseneRoom

9pressure:

86 116 120 78 78

,7terno;;$e 86 109 113 115 116

54mm 87 112 116 118 118&'4mm 84 97 100 101 1004mm 85 94 102 102 103

8/9/2019 DataLab 2

8/9

787

1.2(8480)

2 (9.81 )()

Qi="(0.08 )2

40.97

1.1062m

3

s

Cd , is calculated using the equation below

Cd= Q

A02gh ; wherebyA

0=oriice crosssectionarea ,

" d2

4

For example,

Cd= 1.1062

"(0.049)2

4 29.81 (9982 )

1.2290

e# is calculated using#

Re =

vd

; whereby = the coefficient of dynamic viscosity of air density

= mean pipe velocity, !i"#p

d = pipe diameter

For example,

=

1.2 1.1062

1.9244103

1.87105

2950958

$raph of %d vs Reynolds &umber

8/9/2019 DataLab 2

9/9

0 0.2 0.4 0.6 0.8 1 1.2 1.4

0

500000

1000000

1500000

2000000

2500000

3000000

3500000

eries2

Re%no$ds umber

d va$ue