Flow over an airfoil
AIM: To simulate fluid motion over the Naca aerofoil at different angle of attack.
Objective:
- To have an insight of the aerofoil testing using solidworks software.
Given Data:
The curve used for the aerofoil is provided by the skill-lync.
Modelling an Aerofoil:
- To do fluid flow over the aerofoil, initially I have inserted the curve using insert option.
- Then I have started sketching in the front plane
- I have converted the curve into sketch using convert entites tool.
- Then I have jointed the end points of the curve
- Then I have extruded the curve up-to a certain point.
- Here, we have completed the modelling of the aerofoil.
- Then I have saved the part.
Flow Simulation:
- To do flow simulation, I have started the wizard.
- Then I have given the external flow, then I have given total output time equals to 10 seconds & steps equals to 1 second in total time dependency.
- After that I have changed the input domain & change the 3D to 2D analysis at XY plane.
- I have increased the boundaries in both directions of X and Y axis simultaneously.
- Then I have inserted Global Goals, I have inserted Force in X & Y and Friction Force in X & Y direction.
- Similarly, I have inserted Surface Goals, I have inserted Force in X & Y direction at the top surface.
- Then, I have clicked on Run to start simulation.
Case-1: When the Angle of attack = 0 degree
- Here, I have not change the angle of the curve after completing the sketch of the curve.
- I have simply extruded it & run simulation.
The Velocity Plot obtained at angle of attack equal to 0 degree:
The Pressure Plot obtained at angle of attack equal to 0 degree:
The Goal plot summary at angle of attack equal to 0 degree:
The Plot for different forces at angle of attack equal to 0 degree:
Observations/Results:
- The Average value for the Global force in X direction is 7.744e-005
- The Average value for the Global force in Y direction is -1.129e-007
- The Average value for the Global Friction force in X direction is 4.037e-005
- The Average value for the Global Friction force in Y direction is 8.250e-009
- The Average value for the surface force in X direction is 7.736e-005
- The Average value for the surface force in Y direction is -1.129e-007
Conclusion:
- The lift force at angle of attack equals 0 degree is found to be -1.129e-007
- The drag force at angle of attack equals 0 degree is found to be 7.736e-005
Case-2: When the Angle of attack = 2 degree
- Here, I have change the angle of the curve & line used to connect the curve to 2 degree from the initial position.
- Then I have simply extruded it & run simulation.
The Velocity Plot obtained at angle of attack equal to 2 degree:
The Pressure Plot obtained at angle of attack equal to 2 degree:
The Goal plot summary at angle of attack equal to 2 degree:
The Plot for different forces at angle of attack equal to 2 degree:
Results:
- The Average value for the Global force in X direction is 5.87165E-05
- The Average value for the Global force in Y direction is -0.000293354
- The Average value for the Global Friction force in X direction is 2.32834E-05
- The Average value for the Global Friction force in Y direction is 2.86319E-07
- The Average value for the surface force in X direction is 5.85617E-05
- The Average value for the surface force in Y direction is -0.000296188
Conclusion:
- The lift force at angle of attack equals 2 degree is found to be -0.000296188
- The drag force at angle of attack equals 2 degree is found to be 5.85617E-05
Case-3: When the Angle of attack = 4 degree
- Here, I have change the angle of the curve & line used to connect the curve to 4 degree from the initial position.
- Then I have simply extruded it & run simulation.
The Velocity Plot obtained at angle of attack equal to 4 degree:
The Pressure Plot obtained at angle of attack equal to 4 degree:
The Goal plot summary at angle of attack equal to 4 degree:
Results:
- The Average value for the Global force in X direction is 9.53711E-05
- The Average value for the Global force in Y direction is -0.00054563
- The Average value for the Global Friction force in X direction is 2.43471E-05
- The Average value for the Global Friction force in Y direction is 5.72299e-07
- The Average value for the surface force in X direction is 9.32207E-05
- The Average value for the surface force in Y direction is -0.0005073
Conclusion:
- The lift force at angle of attack equals 4 degree is found to be -0.0005073
- The drag force at angle of attack equals 4 degree is found to be 9.32207E-05
Case-4: When the Angle of attack = 6 degree
- Here, I have change the angle of the curve & line used to connect the curve to 6 degree from the initial position.
- Then I have simply extruded it & run simulation.
The Velocity Plot obtained at angle of attack equal to 6 degree:
The Pressure Plot obtained at angle of attack equal to 6 degree:
Results:
The Goal plot summary at angle of attack equal to 6 degree:
Conclusion:
- The lift force at angle of attack equals 6 degree is found to be 1.368e-004
- The drag force at angle of attack equals 6 degree is found to be-7293e-004
Case-5: When the Angle of attack = 8 degree
- Here, I have change the angle of the curve & line used to connect the curve to 8 degree from the initial position.
- Then I have simply extruded it & run simulation.
The Velocity Plot obtained at angle of attack equal to 8 degree:
The Pressure Plot obtained at angle of attack equal to 8 degree:
The Goal plot summary at angle of attack equal to 8 degree:
Conclusion:
- The lift force at angle of attack equals 8 degree is found to be 1.924e-004
- The drag force at angle of attack equals 8 degree is found to be -9.2470e-004
Case-6: When the Angle of attack = 10 degree
- Here, I have change the angle of the curve & line used to connect the curve to 10 degree from the initial position.
- Then I have simply extruded it & run simulation.
The Velocity Plot obtained at angle of attack equal to 10 degree:
The Pressure Plot obtained at angle of attack equal to 10 degree:
Results:
The Goal plot summary at angle of attack equal to 10 degree:
Conclusion:
- The lift force at angle of attack equals 10 degree is found to be 2.445e-004
- The drag force at angle of attack equals 10 degree is found to be -0.001
Overall Conclusion:
The lift force increases as the angle of attack increases
The drag force decrease as the angle of attack decreases.