University of the Ryukyus1 Graduate School of Engineering and Science
2 Department of Mechanical Systems Engineering
SUMMER INTERNSHIP PRESENTATION
May 21, 2018 - June 20, 2018
MANISHA MISHRA
Junior Year
Department of Mechanical Engineering
Madan Mohan Malaviya University of Technology,
Gorakhpur, India
Advisor: Prof. Izuru Senaha
CONTENTS
1. FLOW VISUALIZATION AND PIV
➢ Experimental Apparatus
➢ Experimental Conditions
➢ Experimental Results and Discussions
2. MEASUREMENT OF WALL TEMPERATURE WITH AN INFRARED
CAMERA
➢ Cooling Mechanism by Mist Evaporation
➢ Effect of Mist on Temperature Distribution
3. POP-POP BOAT
➢ Principle of Operation of Pop-Pop Boat
➢ Materials Used for Making Pop-Pop Boat
4. ACKNOWLEDGEMENT
1
FLOW VISUALIZATION AND PIV
• It is used to obtain instantaneous velocity
measurements and related properties in fluids.
• Particle image velocimetry (PIV) is an optical
method of flow visualization.
2
Experimental Apparatus
3
Experimental Conditions
Flow velocity, u= 6 m/s
Frame rate= 10000 fps
Orifice diameter, D= 20 mm
Lens-resolution: 20.9 dpi
Inspection area: 32 pixels×32 pixels
Laser output= 1.43 W
Laser sheet thickness=3.3 mm
4
Plate
Jet
High-Speed Camera
Laser
Flow Visualization by Laser Sheet
Method
5
Flow Visualisation
Result 1: In the above figure, the vortex rings of the smoke jet used in the flow
visualization can be seen.
The vectors in the various regions of the jet which indicate the speed and
direction (the velocity field) of the flow being studied are seen.
Experimental Results and Discussions
6
-0.2
0
0.2
0.4
0.6
0.8
1
1.2
-4 -3 -2 -1 0 1 2 3 4
U/U
ma
x
y/y(Um/2)
PIV
tollmien
Flow Velocity= 6 m/s
Frame Rate= 10000 fps
Velocity half width distribution compared with Tollmien solution
Result 2: On comparing the curves for PIV and Tollmien’s solution in the
above figure, we see that they are almost equal. Hence, the result is
satisfactory. 7
MEASUREMENT OF WALL TEMPERATURE
WITH AN INFRARED CAMERA
Plate
Infrared
CameraJet
8
Cooling Mechanism by Mist
Evaporation
Cooled Air
Latent Heat
Spouting
Mist Flow
Main Flow
Mist
Cooling the Wall
Surface
Orifice
9
Effect of Mist on Temperature
Distribution
3020100-10-20-30
X cm
-20
-10
0
10
Y c
m
50
45
40
35
30
25
Without mistUj = 6 m/s
3020100-10-20-30
X cm
-20
-10
0
10
Y c
m
With MistUj= 6 m/s 50
45
40
35
30
25
10
50
45
40
35
30
25
Tem
p.
deg
.C
4003002001000
X mm
Uj = 6 m/s With Mist
Without Mist
Effect of Mist on Temperature
Distribution
11
POP-POP BOAT
Water is pushed out of the
coil as the steam expands.
Vacuum is created inside the
coil and water is drawn inside.
Principle of Operation
of a Pop-Pop Boat
12
12 cm 18 cm
9.1 cm
60°
Dimensions of the Hull of the Pop-Pop Boat
➢ The hull of the boat
was made out of
thermocol.
➢ A coil-type boiler
with 2 exhaust
tubes made out of
Aluminium.
➢ 3 candles.
13
Top View Side View
Bottom View14
15
ACKNOWLEDGEMENT
• I would like to thank Prof. Tomohisa Wada for his constant
support and guidance for the past one month.
• My internship advisor, Prof. Senaha for helping me with the
experiments and for being patient throughout.
• Prof. Matsuda and Prof. Yasuda for being so helpful and for
giving me extra information about the experiments.
• Prof. Yaga for taking us to the best places in Okinawa and for
being so kind.
• My lab partners, Saaya, Yuki, Rihito, Tomoya and Masanao for
their help at every point and without whom my internship wouldn’t
have been so exciting.
• I am extremely grateful to Shiho for always being their for us.
• To all the other professors and students, thank you.
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