Ansys-CFX Analysis On A Sedan Car With Wheels And … 2014/Issue9/IJREATV2I3016.pdf · Abstract:...

IJREAT International Journal of Research in Engineering & Advanced Technology, Volume 2, Issue

ISSN: 2320 – 8791 (Impact Factor

www.ijreat.org

Published by: PIONEER RESEARCH & DEVELOPMENT GROUP (www.prdg.org)

Ansys-CFX Analysis

And W

Roopsandeep Bammidi

M.Tech (CAAD)1, (Professor)

Abstract: The Computational Analysis has been

performed on the Sedan Car with wheels and without

wheels at a speed of 60 kmph. Catia, 3D Modeling

Software was used to model the sedan car. Ansys

CFX was used to perform the Computation. The

Aerodynamic Analysis was performed to study the

flow behavior of the air over the sedan car. The

Analysis includes the study of Contours, Vector

Plots, Streamline Flows, Momentum and Mass

Graphs, Turbulence Graphs and an evaluation of

Drag Coefficient.

Keywords: Computational Analysis, Ansys

Catia Modeling, Contours, Vector Plots, Drag

Coefficient.

Introduction:A variety of studies of the aerodynamic

influence of vehicle Front End and Rear End shapes

have been researchedincluding the study of critical

geometry found by plenty of researchers and well

known issue is the rear end shape of car impacts the

drag coefficient. Aerodynamically supe

the benefit of drag reduction which leads increase in

top speed of vehicle, increasing fuel efficiency,

perfect handling performance, aesthetically attractive

The main aim of this paper is to investigate

aerodynamic of Sedan Car with wheels and without

wheels.

IJREAT International Journal of Research in Engineering & Advanced Technology, Volume 2, Issue 3, June

Impact Factor: 1.479)

www.ijreat.org Published by: PIONEER RESEARCH & DEVELOPMENT GROUP (www.prdg.org)

CFX Analysis On A Sedan Car WithWheels

And Without Wheels

Roopsandeep Bammidi1, Dr.B.V.Ramana Murty

(Professor)2

,Gayatri Vidya Parishad College of Engineering (A),

Madhurawada, Visakhapatnam.

The Computational Analysis has been

performed on the Sedan Car with wheels and without

at a speed of 60 kmph. Catia, 3D Modeling

Software was used to model the sedan car. Ansys-

CFX was used to perform the Computation. The

erformed to study the

flow behavior of the air over the sedan car. The

Analysis includes the study of Contours, Vector

Plots, Streamline Flows, Momentum and Mass

Graphs, Turbulence Graphs and an evaluation of

Computational Analysis, Ansys-CFX,

Catia Modeling, Contours, Vector Plots, Drag

A variety of studies of the aerodynamic

End and Rear End shapes

the study of critical

ry found by plenty of researchers and well

known issue is the rear end shape of car impacts the

drag coefficient. Aerodynamically superior cars gives

the benefit of drag reduction which leads increase in

top speed of vehicle, increasing fuel efficiency,

rfect handling performance, aesthetically attractive.

The main aim of this paper is to investigate

aerodynamic of Sedan Car with wheels and without

Catia Modeling: The part modeling of sedan car with

wheels and without wheels is given below:

Fig-1: Sedan Car with wheels.

Fig-2: Sedan Car without wheels.

June-July, 2014

Published by: PIONEER RESEARCH & DEVELOPMENT GROUP (www.prdg.org) 1

Wheels

Dr.B.V.Ramana Murty2

Vidya Parishad College of Engineering (A),

The part modeling of sedan car with

wheels and without wheels is given below:

1: Sedan Car with wheels.

2: Sedan Car without wheels.



www.ijreat.org


Geometrical Dimensions:

Length, mm

4175.62

Width, mm

1500.00

Height, mm

1368.87

Wheel Base, mm

2650.99

Ground Clearance, mm

203.20

Slant Angle, degrees

50

Table-1.

Ansys-CFX Analysis: Ansys-CFX 15.0 is a high end

computer program for modeling fluid flow over the

body in complex geometry. The Aerodynamic

Analysis Contours, Vectors Plots, Streamlines was

studied and drag coefficient was calculated.

The boundary condition for the flow is also an

important factor. Boundary conditions used for this

analysis are given as follows:

Velocity Inlet 16.67 m/s

Sides and Top Symmetric Walls

Road Wall

Table-2.

The Results and Discussions are as follows:




CFX 15.0 is a high end

computer program for modeling fluid flow over the

body in complex geometry. The Aerodynamic

Analysis Contours, Vectors Plots, Streamlines was

tudied and drag coefficient was calculated.

The boundary condition for the flow is also an

important factor. Boundary conditions used for this

Symmetric Walls

The Results and Discussions are as follows:

Fig-3: Pressure Contours of Sedan Car with wheels.

Fig-4: Pressure Contours of Sedan Car without

wheels.

Fig-5: Velocity Contours of Sedan Car with wheels.

June-July, 2014


3: Pressure Contours of Sedan Car with wheels.

4: Pressure Contours of Sedan Car without

5: Velocity Contours of Sedan Car with wheels.



www.ijreat.org


Fig-6: Velocity Contours of Sedan Car without

wheels.

Fig-7: Pressure Vector Plots of Sedan Car with

Wheels.

Fig-8: Pressure Vector Plots of Sedan Car

wheels.




6: Velocity Contours of Sedan Car without

7: Pressure Vector Plots of Sedan Car with

ssure Vector Plots of Sedan Car without

Fig-9: Velocity Vector Plots of Sedan Car

wheels.

Fig-10: Velocity Vector Plots of Sedan Car without

wheels.

Fig-11: Turbulence (KE) of Sedan Car with wheels.

June-July, 2014


ocity Vector Plots of Sedan Car with

Plots of Sedan Car without

11: Turbulence (KE) of Sedan Car with wheels.



www.ijreat.org


Fig-12: Turbulence (KE) of Sedan Car without

wheels.

The graphs associated with this Analysis are as

follows:

Graph-1: Momentum and Mass graph of Sedan Car

with wheels.




12: Turbulence (KE) of Sedan Car without

The graphs associated with this Analysis are as

1: Momentum and Mass graph of Sedan Car

Graph-2: Momentum and Mass graph of Sedan Car

without wheels.

Graph-3: Turbulence (KE) graph of Sedan Car with

wheels.

June-July, 2014


2: Momentum and Mass graph of Sedan Car

3: Turbulence (KE) graph of Sedan Car with



www.ijreat.org


Graph-4: Turbulence (KE) graph of Sedan Car

without wheels.

The Velocity Streamlines of Sedan Car with and

without wheels is as follows:

Fig-13: Velocity Streamlines of Sedan Car with

wheels.




4: Turbulence (KE) graph of Sedan Car

The Velocity Streamlines of Sedan Car with and

13: Velocity Streamlines of Sedan Car with

Fig-14: Velocity Streamlines of Sedan Car without

wheels.

The drag coefficient found for this model through

Ansys-CFX analysis is as follows

Graph-5: Drag Coefficient of Sedan

June-July, 2014


14: Velocity Streamlines of Sedan Car without

The drag coefficient found for this model through

CFX analysis is as follows:

5: Drag Coefficient of Sedan Car with wheels.



www.ijreat.org


Graph-6: Drag Coefficient of Sedan Car without

wheels.

Car Model

Drag Coefficient

Sedan Car with wheels

0.429227

Sedan Cars without

wheels.

0.308154

Table-3.

Drag Coefficient of the vehicle is impacted on shape.

And drag force increases with increase in speed of

the vehicle. Sedan car without wheels has low drag

when compared with Sedan car with wheels from

CFX analysis.




6: Drag Coefficient of Sedan Car without

Drag Coefficient

Drag Coefficient of the vehicle is impacted on shape.

d drag force increases with increase in speed of

the vehicle. Sedan car without wheels has low drag

when compared with Sedan car with wheels from

Conclusion: Aerodynamic Styling plays

role in passenger car’s fuel economy, performance,

emissions, handling and stability. This paper gave us

an experience in understanding the variations

between sedan car with wheels and without wheels.

The wake formations of sedan car without whe

low when compared with sedan car with wheels and

also the Drag Coefficient of Sedan Car without

wheels has lowest drag when compared with Sedan

Car with wheels.

Further Work: The Aerodynamic Design must be

improved for the Sedan car with wheels as it has

highest drag coefficient when compared with Sedan

Car without wheels. But in reality the vehicle moves

with wheels only. So for better results, the Sedan

with wheels must be redesign once again for

obtaining lowest drag coefficient.

References:

1) Sugiono, W. M. Hong, O. Ilias, “Developing

thedatabase for vehicle body shape design

with theless of aerodynamic resistance and

vibration”ECCM 2010 , IV European

Conference onComputatio

Palais des Congrès,Paris, France (May 16

21, 2010).

2) M. Desai, S A Channiwala and H J

Nagarsheth,“A comparative assessment of

two experimentalmethods for aerodynamic

performanceevaluation of a car,”

scientific &Industrial research,

518 – 522 (July2008).

3) Prof.A.S.Sorathiya M.E thesis, "Flow

simulation and investigation of aerodynamic

June-July, 2014


Aerodynamic Styling plays a crucial

role in passenger car’s fuel economy, performance,

emissions, handling and stability. This paper gave us

an experience in understanding the variations

between sedan car with wheels and without wheels.

The wake formations of sedan car without wheels are

low when compared with sedan car with wheels and

he Drag Coefficient of Sedan Car without

wheels has lowest drag when compared with Sedan

The Aerodynamic Design must be

improved for the Sedan car with wheels as it has

highest drag coefficient when compared with Sedan

Car without wheels. But in reality the vehicle moves

with wheels only. So for better results, the Sedan

edesign once again for

obtaining lowest drag coefficient.

Sugiono, W. M. Hong, O. Ilias, “Developing

thedatabase for vehicle body shape design

with theless of aerodynamic resistance and

ECCM 2010 , IV European

Conference onComputational Mechanics,

Palais des Congrès,Paris, France (May 16-

M. Desai, S A Channiwala and H J

Nagarsheth,“A comparative assessment of

two experimentalmethods for aerodynamic

performanceevaluation of a car,” Journal of

scientific &Industrial research, Vol. 67, pp

Prof.A.S.Sorathiya M.E thesis, "Flow

simulation and investigation of aerodynamic

IJREAT International Journal of Research in Engineering & Advanced Technology, Volume 2, Issue 3, June-July, 2014

ISSN: 2320 – 8791 (Impact Factor: 1.479)

www.ijreat.org

www.ijreat.org Published by: PIONEER RESEARCH & DEVELOPMENT GROUP (www.prdg.org) 7

forces of car by ANSYS-CFX" Gujarat

University 2009.

4) Bhagirath zala M.E. thesis, "Aerodynamic

performance of Sedan and hatchback car by

experimental method and simulation by

computational fluids dynamics" Gujarat

Technical University 2011 .

5) "Improvement of vehicle aerodynamics by

wake control"JSAE Review 16 (1995),

pp.151-155.

6) Simon Watkins, Gioacchino Vino "The

effect of vehicle spacing on the

aerodynamics of a representative car shape”

Journal of Wind Engineering and Industrial

Aerodynamics 96 (2008) p.1232–1239.

Authors:

Roopsandeep Bammidi

Pursuing M-Tech in

Computer Aided Analysis and Design, Department of

Mechanical Engineering, GVP College of

Engineering(A), Madhurawada, Visakhapatnam.

Dr.B.V.Ramana Murty

Professor, Department of

Mechanical Engineering, GVP College of

Engineering (A), Madhurawada, Visakhapatnam.

Ansys-CFX Analysis On A Sedan Car With Wheels And … 2014/Issue9/IJREATV2I3016.pdf · Abstract:...

Documents

Transcript of Ansys-CFX Analysis On A Sedan Car With Wheels And … 2014/Issue9/IJREATV2I3016.pdf · Abstract:...