StudentShare solutions

# Velocity Distribution of a Circular Air Jet - Lab Report Example

## Extract of sampleVelocity Distribution of a Circular Air Jet

7.3 Repeat the procedure for x=10D

7.4 The graphs should be symmetrical about the centerline. Decide for which graph, which value for y is at the center so that by subtraction, it is possible to plot V against radius r, measured from the centerline of the jet.

8 Analysis

8.1 Replot small versions of the three v, y curves on a plan view, identify and label

(i) the edge of the jet
(ii) the core, in which the air velocity is v0
(iii) the mixing region, where v is less than v0

8.2 From the plan view measure the divergence angle of the jet

8.3 Plot the centerline velocity distribution

8.4 Calculate q0, the volume flow rate leaving the nozzle, in m3s-3. It reasonable to assume that v0 is constant in the nozzle exit plane.

8.5 Calculate q10, the volume flow rate at x = 10D. In this case the air velocity is not constant thus it is necessary to integrate to find the volume flow rate.

9. Results of the air jet experiment:

Air Jet
v distribution
x=1D
pitot position (mm)
inches
mm

0
0.875
22.225

20
0.87
22.098

40
0.875
22.225

60
0.875
22.225

80
0.86
21.884

100
0.8
20.32

150
0.61
15.494

200
0.44
11.176

250
0.24
6.096

300
0.24
6.096

350
0.18
4.572

400
0.145
3.683

450
0.11
2.794

Air Jet
v distribution
x=2D
pitot position (mm)
inches
mm

0
0
0

10
0.01
2.254

15
0.09
2.286

20
0.51
12.954

25
0.84
21.336

30
0.84
21.336

35
0.795
20.193

40
0.765
19.431

45
0.48
12.192

50
0.12
3.048

55
0.05
1.27

60
0
0

Air Jet
v distribution
x=10D
pitot position...
However, in this experiment the error can be considered as negligible
A fan supplies air to a nozzle, which can provide a circular uniform jet of air. The nozzle is 30 mm in diameter. The velocity distribution in the jet is measured using a pitot static tube. The Pitot-static tube can be traversed across the jet diameter and also across its length by sliding the support against a millimeter scale to record its position. The pitot static tube is connected to an inclined manometer.
7.2 Measure the air velocity at points along the horizontal diameter at x=2D. Plot the variation of v with y as you take your readings. Use your judgment over how many points you need, ensuring that you locate the endpoints at the edge of the jet
7.4 The graphs should be symmetrical about the centerline. Decide for which graph, which value for y is at the center so that by subtraction, it is possible to plot V against radius r, measured from the centerline of the jet.
The pressure in the center of the jet is higher at the point of origin. The pressure stabilizes further away to the point of origin to match the surrounding pressure and hence the jet spreads out as it flows in order to reduce its density. ...Show more

## Summary

To investigate the velocity distribution of a circular air jet at a number of stations along the length, to reveal how a uniform jet mixes with its surroundings by using a pitot-static tube to measure the velocity of the fluid in the jet.
The pitot static tube measures two pressures, P0 and P, the Total and Static pressures respectively…
Author : jmueller
Save Your Time for More Important Things
Let us write or edit the lab report on your topic
"Velocity Distribution of a Circular Air Jet"
with a personal 20% discount.
Grab the best paper

### Related Essays

Impact of a water Jet laboratory
The experiment uses two deflectors, which can be categorized in two shapes. The two plates that are used in this experiment are hemispherical and flat shape plates. Force, flow rate, velocity, and the flux were calculated in this experiment.
11 pages (2750 words) Lab Report
A scientific report about air pollution due to automotive emissions
Use of catalytic converters in vehicles running on petrol significantly reduced these levels. The efficiency of the converters was increased with increased vehicular speed. However, as the converters aged, their efficiency diminished
3 pages (750 words) Lab Report
Falling Objects and Air Resistance
The magnitude of that force depends on the objects velocity, increasing with increasing velocity. The underlying law is derived empirically rather than based on theory. For most situations, simple approximations usually suffice; the simplest one of them is the
2 pages (500 words) Lab Report
HCL gas detection by using manual air sampling pump
Since then, a numerous number of tubes have been developed for a broad range of chemicals. The introduction of OSHA regulations in the work place in 1970s, the chemical compounds, have expanded from the mostly inorganic, toxic compounds to include large
5 pages (1250 words) Lab Report
Impact of a water Jet laboratory
In regard to liquid helium, it can only be solidified under pressure The (Computer-Based Laboratory, 2007). Research has it that most substances freeze and melt at the same temperature points. However, some substances have different solid-liquid
6 pages (1500 words) Lab Report
Investigation#4:Initial Velocity of a Projectile
Projectile usually has an initial non-zero horizontal velocity whose acceleration is due to gravity alone. An object can also ceased to a projectile once any real effect is made to change its
1 pages (250 words) Lab Report
Callbration of air sampling pump
In which case, the results are expressed in mass per volume units. The process can only be successful when the representative sample of air is sampled and the volume is also determined accurately. This formed the basis for the modern calculation of flow rate
3 pages (750 words) Lab Report
Analyzing the place kick in tackle football to determine the factors that achieve highest foot velocity at ball impact
Usually, the kicking task is separated into three main tasks. These include the approach, execution, and follow-through (Kreighbaum 370). The tasks are described in tables as shown below, with each table showing a separate phase, starting with the approach, execution,
2 pages (500 words) Lab Report
Velocity of Sound
A clamped metal rod was stroked in a lateral manner so as to produce energy and friction in form of the longitudinal wave. On entering the tube, the wave agitates the dust within and hence forming visible shapes. Measurements were then
4 pages (1000 words) Lab Report
Air quality lab report
Do the Nitrogen Dioxide levels affect the Ozone data (Wang & Guan 2010)? In conclusion, the level of air pollution in Los Angeles is higher than that of the Orange County.
1 pages (250 words) Lab Report
Get a custom paper written
by a pro under your requirements!
Win a special DISCOUNT!
Put in your e-mail and click the button with your lucky finger