Scott Fluid Circuit System Engineering Essay

August 21, 2017 Engineering

To mensurate the major caput losingss of the fluid utilizing Scott Fluid Circuit System. Equally good as, analysing the relation between the force per unit area, speed and the clash originating from the flow.

Abstraction:

In this lab, an attack of Reynolds theory was used to find the caput loss within the flow of the fluid actioning Scott fluid circuit. The Experiment was conducted utilizing two different sizes of pipes which were A? in and 1 in.

For the A? in, the Moody chart was referred for the value of clash factor utilizing the raggedness and the Reynolds no. The Roughness curve does be given to shut out at Reynolds figure = 10^5 after which the curve analysis is required to find the appropriate clash factor. The experiment did reason the least possible % mistake for the Venturi metre tallness of 5.25 inches. Other mistakes does be given to depict the mistake in the analysis of the information or some other elements factoring the information aggregation.

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Theory:

Harmonizing to Reynolds, there are two types of pipe flows:

Laminar Flow

Turbulent Flow

Laminar flows are low in speed and the fluid atoms move in a consecutive line. Whereas, the turbulent flows are high in speed and gesture of the fluid atoms are irregular.

As the fluids are syrupy, they lose energy when fluxing due to clash. The Pressure loss due to clash is termed as the caput loss.

The Flow Rate, Q ; Q1 = Q2 = Constant

Or, V1 = V2 = Constant

Change in the Pressure and Gravity can be equated to the caput loss, i.e,

Head loss due to clash is in a round pipe, fluxing laminar or turbulent flow for

f=friction factor

L=length of pipe

D=diameter of pipe.

I?= Kinematic viscousness

And for the Reynolds figure, Re = V*D / I?

Iµ , which is the roughness coefficient related to the raggedness of the walls.

And mentioning to the Moody chart relates to the raggedness Iµ and the Reynolds figure for finding the clash factor, ( degree Fahrenheit ) .

Apparatus:

Manometer

Rotometer

Pump

Venturi Tube

Procedure:

Make certain all equipments are clean.

Undertaking is divided into separate group.

Make sure that the system valves are closed, i.e. If the pipe flow with diameter A? inches is used, do certain that the valves other pipes are closed. This manner there will be no escape in the system.

Recording the force per unit area degrees and do certain that there is no back force per unit area physique in the pump and that all flow is uninterrupted.

Data Analysis & A ; Calculations:

Sample computation utilizing major A? inches

First convert a?†P in inches to foots:

Flow rate = Q =

Flow Rate = Q =

Flow Rate = Q = 0.018364 ft3 / sec

Converting Flow Rate from ( ft3 / sec ) to ( gallons / minute )

448.8311688 ft3/s/g/m * .015 ft3/s = 8.242475 gallons / minute

Velocity = Flow Rate / Area = Q / A = .015 ft3 / sec / .003360986 ft2 = 5.463979 foot / sec

Reynolds Number = ( 5 * D ) / I? = ( 4.556 foot / sec * 1.025 * 1 foot / 12 in ) / ( .000011 ft2 / sec ) = 42428.63

Friction Factor = Recorded utilizing Moody Chart = 0.0217

Head Loss = f * ( L / D ) * ( V2 / 2 * g )

Head Loss = 0.0217 * ( 5 foot / 1.025 in * 1 foot / 12 in ) * ( ( 5.463979 ft/sec ) 2 / 2 * 32.2 foot / sec2 )

Head Loss = 0.58887 foot

Indicated Head Loss = 0.541667 foot

FOR 3/4 INCHES PIPE

Roughness, vitamin E ( foot ) =

0.000005

Length L=

5

foot

e/D =

5.85366E-05

Cadmium =

0.98

I? = d/D=

0.609756098

M =

1.077224

AT =

0.002130529

ft^2

Area of 3/4 in pipe =

0.003361

ft^2

Kinematic Viscosity =

0.000011

ft^2/sec

Throat diameter, vitamin D =

0.625

inches

=

0.052083

foot

Major Diamerter, D =

1.025

inches

=

0.085417

foot

Venturi Meter

( inches )

Venturi Meter

( feets )

Flow Rate,

Q, ( ft^3/sec )

Flow Rate,

Q, ( gpm )

Speed

( ft/sec )

Reynolds

Number

Clash

Factor

( degree Fahrenheit )

Calculated

Head Loss

( foot )

Indicated

Head Loss

( inches )

Indicated

Head Loss

( pess )

Error ( % )

11

0.916666667

0.066388

29.79674

19.75241

153380.5

0.0185

6.560751

11.75

0.979167

570.0341

9.125

0.760416667

0.055072

24.71775

16.38552

127236.1

0.0195

4.758793

10

0.833333

471.0552

7.125

0.59375

0.043001

19.30016

12.79418

99348.72

0.02

2.975748

9.75

0.8125

266.2459

5.25

0.4375

0.031685

14.22117

9.427288

73204.32

0.0217

1.752971

6.5

0.541667

223.6255

3.125

0.260416667

0.01886

8.464983

5.611481

43574

0.0245

0.701233

5

0.416667

-68.296

FOR 1 INCHES PIPE

Roughness, vitamin E ( foot ) =

0.000005

Length L=

5

foot

e/D =

5.85366E-05

Cadmium =

0.98

I? = d/D=

0.609756098

M =

1.077224

AT =

0.002130529

ft^2

Area of 1 in pipe =

0.00573

ft^2

Kinematic Viscosity =

0.000011

ft^2/sec

Throat diameter, vitamin D =

0.625

inches

=

0.052083

foot

Major Diamerter, D =

1.025

inches

=

0.085417

foot

Venturi Meter

( inches )

Venturi Meter

( feets )

Flow Rate,

Q, ( ft^3/sec )

Flow Rate,

Q, ( gpm )

Speed

( ft/sec )

Reynolds

Number

Clash

Factor

( degree Fahrenheit )

Calculated

Head Loss

( foot )

Indicated

Head Loss

( inches )

Indicated

Head Loss

( pess )

Error ( % )

16.375

1.364583333

0.098827

44.35651

17.24648

133921.5

0.0165

4.460939

6.125

0.510417

773.9798

12.625

1.052083333

0.076195

34.19853

13.2969

103252.5

0.017

2.732067

5.625

0.46875

482.841

8.75

0.729166667

0.052808

23.70195

9.215675

71561.11

0.0193

1.489886

5

0.416667

257.5727

4.5

0.375

0.027159

12.18957

4.73949

36802.86

0.022

0.449187

4.375

0.364583

23.20564

1.75

0.145833333

0.010562

4.74039

1.843135

14312.22

0.0295

0.091091

3.625

0.302083

69.84558

Consequences:

Mistake Analysis:

% Error = [ Experimental value – Actual Value ] / [ Actual Value ] * 100 %

% Error = [ 0.58887 – 0.541667 ] / [ 0.541667 ] *100 % = 8.714433 %

Decision:

The information collected and calculated consequences make clot the equation, hafnium = degree Fahrenheit * ( L / vitamin D ) * ( V2 / 2 * g ) , demoing that pipe caput loss equals the alteration in the amount of force per unit area and gravitation caput. Hence, it can be said that the clash factor is a map of the Reynolds Number, and therefore the raggedness factor is valid.

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