Transcript Simulation of Compressible Flow around the Bullet Trains E ngineering

Engineering
EP-255X-X-XX
P R O J E C T
Simulation of Compressible Flow
around the Bullet Trains
Project Members:
Tatiya Sameeyai
Cheerawan Thetchanda
B5212828
B5228591
Project Advisor:
Assist.Prof.Dr.Keerati Suluksna
School of Aeronautical Engineering, Institute of Engineering,
Suranaree University of Technology
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Engineering
P R O J E C T
Background
Fig.1
The original model of bullet train head is usually encountered
with shock effect during it run through the tunnel because of
rapidly change in density of air between outside-to-inside zone of
tunnel.
Fig.2
New model of bullet train
head is designed like the
king fisher bird to resolve
the effect of shock.
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Objective
 To Simulate the aerodynamics behavior around the two model of bullet
trains, original and kingfisher models, under the condition of
compressible flow.
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Scopes
 Two models of bullet train heads, original and king fisher models, are
determined in the project activities.
 Three flow speed of 250, 270, 300 km/hr have been investigated in the
simulation.
 The simulation will be investigated under the condition of turbulence
compressible flow by means of CFD method with ANSYS Fluent 12.0
 Tunnel bore size of 6.4 m will be considered here.
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Expectation
 The behaviors of air flow around the two models of bullet train head, the
original and king fisher models, under the conditions of viscous and
incompressible flow based on turbulence model prediction.
 Comparison results of wall shear stress of two those models due to the
skin friction.
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Activities
CAD Files Creation
Fig.3 Bullet train head geometries created from computer software: original model (top)
and new model (bottom)
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Activities
Simulation Results: Wall Shear Stress
Original Model:
New Model (King fisher model):
Simulation results under the
condition of (upper) incompressible
flow and (lower) compressible flow
Simulation results under the
condition of (upper) incompressible
flow and (lower) compressible flow
Fig.4 Comparison of predicted wall shear stress for the two considered models: (left)
Original model and (right) New model (King fisher model)
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Week 11
Conclusion and Report writing
Week 10
5
Week 9
Simulate the air flow
Week 8
4
Week 7
Create CAD models
Week 6
3
Week 5
Practice on software and validation
Week 4
2
Week 3
Survey the project information
Week 2
1
Week 1
Activities
Project Plan
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P R O J E C T
THANK YOU
Q&A
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