Analysis Of Naca2415 Airfoil Using Fluent
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BY
Mohammed Suhail Nidhin C. Rahul P. Rupesh V. Sandeep C. K. Sajith P. P. Sanesh N. K.
CFD enables one to study the dynamics of things that flow with the help of computer programs.
Gives results in detail in relatively short time and is very cheap to use.
Can be used to solve big and complex simulations which cant be simulated by wind tunnel like atmospheric re-entry.
Commonly used for designing wings of small single engine aircrafts.
It’s a laminar flow airfoil, hence is more efficient than the conventional airfoil.
To find the change in lift acting on the airfoil due to the change in angle of attack.
And to obtain the change in distribution of pressure and velocity around the airfoil.
We
used
Spalart–Allmaras
to
solve
the
turbulent fluid flow around the airfoil.
Spalart–Allmaras is a single equation model specially used to solve the boundary layer fluid around aerodynamic objects.
The velocity of air was kept steady at 0.2 mach.
Ambient temperature was kept at 300K.
Simulation was done at atmospheric pressure.
The grid used is shown:
The contours were checked for any abnormalities.
The wall y plus value was checked that whether it lied inside 150.
It was seen that on increasing the angle of incidence of the fluid the airfoil generated more lift.
But after a certain point the lift started to decrease
drastically. 50 40 30 20
Drag Vertical Lift Vertical
10 0 -5 -4 -3 -2 -1 0 -10 -20
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16 17 18
Static o
Pressure variation: AOA 6o
o
AOA 10o
Variation
o
of Velocity: AOA 6o
o
AOA 10o
The applications of CFD are innumerable:
Automobile industry.
Aviation industry.
Space exploration.
Biomedical fields.
Weather prediction
Sports and recreational activities.
In design of buildings and structures.
Designing ships and submarines….
©
Opportunities © Wide
open market in terms of nature of business/applications © Broadly three sectors © ©
©
CFD Developers CFD Application Engr. CFD Consultants
© Over
1000 CFD Companies/Research Centre's and Institutes in the world © Always in Demand of experienced professionals © 2- 3 billion USD market of s/w and consulting © Annual growth rate of 25- 30 % © Open source software OPEN FOAM
Product
Consulting
Infosys, Infotecg TCS, Wipro, Quantech, Pacific Mindware, Transoft, Machwell, Neilsoft, COMSOL, Satyam, Sungrace, Flexio n, Mahindra Engg, CADES, Onward, Bechtel, CSM , QuEST, Apramya….
Engineering
Fluent, Star CD, Ansys MatrixCFD, ESI, Flowmerics, Zeus Numerix, Tetrahedrix, Tridiagonol, Flowmaster, Transoft,COMSOL,etc..
TATA, Ashok Leyland,Mahindra, Thermax, BHEL, Kirloskar, MICO, reliance NTPC, Escort, Forbes Marshall, Maruti, Toyo Atlas, TVS, and all automotive sector companies, etc
Design
John Deere, Eaton GE JFWTC, Emerson, Cummins, GM, Whirlpool, SNECMA, Honeywell, Intel, Asu s, Airbus, Boeing, Ford, TACO, Delphi , etc…
Enough opportunities in Private sector
Govt. design labs and research organizations
IITS, IISc, TIFR, BARC, ISRO, DRDO, ADA, ADE, NAL, HAL, VSSC and many more smaller laboratories.
©
© © ©
©
Not so perfect (Approximation so not exact) Erroneous if inputs are incorrect (GIGO) Modeling of complex physics still a challenge Uncertainty- due to lack of knowledge( turbulence) Errors Modeling (Simplification) © Truncation © Discretization error ©
© © ©
© ©
Convergence Stability Consistency Expertise required to some level Vast and complex
Lift and drag forces increase with the increase in angle of attack of the wing
On increasing the angle to a further 18o the lift starts to drop and drag starts to increase drastically.
Mohammed Suhail Nidhin C. Rahul P. Rupesh V. Sandeep C. K. Sajith P. P. Sanesh N. K.
CFD enables one to study the dynamics of things that flow with the help of computer programs.
Gives results in detail in relatively short time and is very cheap to use.
Can be used to solve big and complex simulations which cant be simulated by wind tunnel like atmospheric re-entry.
Commonly used for designing wings of small single engine aircrafts.
It’s a laminar flow airfoil, hence is more efficient than the conventional airfoil.
To find the change in lift acting on the airfoil due to the change in angle of attack.
And to obtain the change in distribution of pressure and velocity around the airfoil.
We
used
Spalart–Allmaras
to
solve
the
turbulent fluid flow around the airfoil.
Spalart–Allmaras is a single equation model specially used to solve the boundary layer fluid around aerodynamic objects.
The velocity of air was kept steady at 0.2 mach.
Ambient temperature was kept at 300K.
Simulation was done at atmospheric pressure.
The grid used is shown:
The contours were checked for any abnormalities.
The wall y plus value was checked that whether it lied inside 150.
It was seen that on increasing the angle of incidence of the fluid the airfoil generated more lift.
But after a certain point the lift started to decrease
drastically. 50 40 30 20
Drag Vertical Lift Vertical
10 0 -5 -4 -3 -2 -1 0 -10 -20
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16 17 18
Static o
Pressure variation: AOA 6o
o
AOA 10o
Variation
o
of Velocity: AOA 6o
o
AOA 10o
The applications of CFD are innumerable:
Automobile industry.
Aviation industry.
Space exploration.
Biomedical fields.
Weather prediction
Sports and recreational activities.
In design of buildings and structures.
Designing ships and submarines….
©
Opportunities © Wide
open market in terms of nature of business/applications © Broadly three sectors © ©
©
CFD Developers CFD Application Engr. CFD Consultants
© Over
1000 CFD Companies/Research Centre's and Institutes in the world © Always in Demand of experienced professionals © 2- 3 billion USD market of s/w and consulting © Annual growth rate of 25- 30 % © Open source software OPEN FOAM
Product
Consulting
Infosys, Infotecg TCS, Wipro, Quantech, Pacific Mindware, Transoft, Machwell, Neilsoft, COMSOL, Satyam, Sungrace, Flexio n, Mahindra Engg, CADES, Onward, Bechtel, CSM , QuEST, Apramya….
Engineering
Fluent, Star CD, Ansys MatrixCFD, ESI, Flowmerics, Zeus Numerix, Tetrahedrix, Tridiagonol, Flowmaster, Transoft,COMSOL,etc..
TATA, Ashok Leyland,Mahindra, Thermax, BHEL, Kirloskar, MICO, reliance NTPC, Escort, Forbes Marshall, Maruti, Toyo Atlas, TVS, and all automotive sector companies, etc
Design
John Deere, Eaton GE JFWTC, Emerson, Cummins, GM, Whirlpool, SNECMA, Honeywell, Intel, Asu s, Airbus, Boeing, Ford, TACO, Delphi , etc…
Enough opportunities in Private sector
Govt. design labs and research organizations
IITS, IISc, TIFR, BARC, ISRO, DRDO, ADA, ADE, NAL, HAL, VSSC and many more smaller laboratories.
©
© © ©
©
Not so perfect (Approximation so not exact) Erroneous if inputs are incorrect (GIGO) Modeling of complex physics still a challenge Uncertainty- due to lack of knowledge( turbulence) Errors Modeling (Simplification) © Truncation © Discretization error ©
© © ©
© ©
Convergence Stability Consistency Expertise required to some level Vast and complex
Lift and drag forces increase with the increase in angle of attack of the wing
On increasing the angle to a further 18o the lift starts to drop and drag starts to increase drastically.
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