Challenge

Week 7 - Minor Project

Week 7 - Minor Project

In this project, the student will have to setup the domain for analysis of flow over an airfoil at subsonic and supersonic regime. The airfoil will be analysed at 3 different angles of attack and the lift and drag coefficient will be compared in all cases

  • Create domain for flow analysis
  • Setup simulation for subsonic and supersonic regimes at

○5, 10, 15 angle of attack

In this Challenge, we are going to simulate the flow around a NACA0012 Airfoil in 3 different angles and airspeeds.

The angles are 5, 10 and 15 degree AOA.

NACA 0012 Airfoil Cordinates

Polyline = true		
1	1		0.00126
1	0.992704	0.002274
1	0.979641	0.004079
1	0.964244	0.006169
1	0.947231	0.008434
1	0.929323	0.010765
1	0.910956	0.013101
1	0.892372	0.01542
1	0.873723	0.0177
1	0.855041	0.019931
1	0.836311	0.022119
1	0.817558	0.024266
1	0.798819	0.026366
1	0.780088	0.028414
1	0.761336	0.030413
1	0.74256		0.03237
1	0.72378		0.034284
1	0.705012	0.036149
1	0.686255	0.037964
1	0.667502	0.039728
1	0.648751	0.04144
1	0.630004	0.043098
1	0.611266	0.044701
1	0.592538	0.046245
1	0.573821	0.047728
1	0.555117	0.049149
1	0.53643		0.050503
1	0.517763	0.051786
1	0.499117	0.052996
1	0.480488	0.054127
1	0.461875	0.055178
1	0.443287	0.056144
1	0.42474		0.057019
1	0.406241	0.057796
1	0.387789	0.058466
1	0.369372	0.059023
1	0.350989	0.059462
1	0.332648	0.059779
1	0.314366	0.059965
1	0.296159	0.060009
1	0.278033	0.059903
1	0.259997	0.059634
1	0.24206		0.059191
1	0.224236	0.058562
1	0.206544	0.057733
1	0.189011	0.056692
1	0.171676	0.055421
1	0.154596	0.053909
1	0.137852	0.052138
1	0.121548	0.050098
1	0.105827	0.047785
1	0.090903	0.04522
1	0.077039	0.042449
1	0.064541	0.039548
1	0.053594	0.036612
1	0.044211	0.033717
1	0.036254	0.030913
1	0.029567	0.028218
1	0.023982	0.025653
1	0.01931		0.023217
1	0.015371	0.020871
1	0.012012	0.018579
1	0.009117	0.016316
1	0.006653	0.014058
1	0.004621	0.011797
1	0.003007	0.009544
1	0.001777	0.007318
1	0.000894	0.005155
1	0.000322	0.003059
1	0.000036	0.001014
1	0.000036	-0.001014
1	0.000322	-0.003059
1	0.000894	-0.005155
1	0.001777	-0.007318
1	0.003007	-0.009544
1	0.004621	-0.011797
1	0.006653	-0.014058
1	0.009117	-0.016316
1	0.012012	-0.018579
1	0.015371	-0.020871
1	0.01931		-0.023217
1	0.023982	-0.025653
1	0.029567	-0.028218
1	0.036254	-0.030913
1	0.044211	-0.033717
1	0.053594	-0.036612
1	0.064541	-0.039548
1	0.077039	-0.042449
1	0.090903	-0.04522
1	0.105827	-0.047784
1	0.121548	-0.050098
1	0.137852	-0.052138
1	0.154596	-0.053909
1	0.171676	-0.055421
1	0.189011	-0.056692
1	0.206544	-0.057733
1	0.224236	-0.058562
1	0.24206		-0.059191
1	0.259997	-0.059634
1	0.278033	-0.059903
1	0.296159	-0.060009
1	0.314366	-0.059965
1	0.332648	-0.059779
1	0.350989	-0.059462
1	0.369372	-0.059023
1	0.387789	-0.058466
1	0.406241	-0.057796
1	0.42474		-0.057019
1	0.443287	-0.056144
1	0.461875	-0.055178
1	0.480488	-0.054127
1	0.499117	-0.052996
1	0.517763	-0.051786
1	0.53643		-0.050503
1	0.555117	-0.049149
1	0.573821	-0.047728
1	0.592538	-0.046245
1	0.611266	-0.044701
1	0.630004	-0.043098
1	0.648751	-0.04144
1	0.667502	-0.039728
1	0.686255	-0.037964
1	0.705012	-0.036149
1	0.72378		-0.034284
1	0.74256		-0.03237
1	0.761336	-0.030413
1	0.780088	-0.028414
1	0.798819	-0.026366
1	0.817558	-0.024266
1	0.836311	-0.022119
1	0.855041	-0.019931
1	0.873723	-0.0177
1	0.892372	-0.01542
1	0.910956	-0.013101
1	0.929323	-0.010765
1	0.947231	-0.008434
1	0.964244	-0.006169
1	0.979641	-0.004079
1	0.992704	-0.002274
1	1		-0.00126
1	1		0.00126

Import this coordinates in SpaceClaim and the geometry can easily be drawn.

The geometry

The domain or the enclosure for the simulation.

Meshing,
Open Mesh
CASE SETUP
SUBSONIC FLOW
Case 1
AOA = 5 degree.
So, the Velocity in the X and Y direction will be 51.8 and 4.53 each
Results
The Velocity COntour
Pressure Contour
Scaled Residuals
Coefficient of Drag Plot
Coefficient of Lift Plot
CASE 2
The angle of Attack = 10 Degrees

Velocity component at inlet (X): 51.21m/s

Velocity component at inlet (Y): 9.029m/s

Results

Pressure Contour

Velocity Contour

Scaled Residuals

Coefficient of Drag Plot

Coefficient of Lift Plot

CASE 3

The angle of Attack: 15 degrees

Velocity component at inlet (X): 50.22m/s

Velocity component at inlet (Y): 13.45m/s

Results

Static Pressure Contour

Velocity Contour

Residual Plot

Coefficient of Drag Plot

Coefficient of Lift Plot

SUPERSONIC FLOW

CASE 1

Angle of Attack: 5 degrees

Velocity component at inlet (X): 398.477 m/s

Velocity component at inlet (Y): 34.862 m/s

Results

Velocity Contour

Pressure Contour

Scaled Residuals

Coefficient Of Lift Plot

Coefficient of Drag Plot

CASE 2

Angle of Attack: 10 degrees

Velocity component at inlet (X): 393.923 m/s

Velocity component at inlet (Y): 69.459 m/s

RESULTS

Pressure Contour

Velocity Contour

Scaled Residuals

Coefficient of Lift Plot

Coefficient of Drag Plot

CASE 3

Angle of Attack: 15 degrees

Velocity component at inlet (X): 386.3703 m/s

Velocity component at inlet (Y): 103.527 m/s

RESULTS

Pressure Plot

Velocity Contour

Scaled Residuals

Coefficient of Lift Plot

Final Results

Angle of Attack Subsonic Flow Supersonic Flow
(degrees) Drag Coefficient Lift Coefficient Drag Coefficient Lift Coefficient
5 0.01523 0.2194 0.0301 0.1820
10 0.04462 0.4392 0.0430 0.4272
15 0.00091 0.0618 0.0887 0.6035
Conclusion
For the incompressible flow as the AOA is increased the Cl and Cd increases but for compressible flow 15 deg AOA is decreased because it is near the stalling condition. If you compare the AOA of the incompressible and compressible flow the Cl and Cd is more for compressible flow because of the velocity, as the velocity increases the lift increases
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