Week 3 Challenge : CFD meshing on Turbocharger

Objective: 

• Check for the geometrical errors to make appropriate volumes. Create and assign PIDs as shown. Perform surface mesh with the given target lengths as per PIDs.

1. Blade stage-1 = 1 mm
2. Blade stage-2 = 1 mm
3. Impeller = 2 mm
4. Shaft rotor = 1 mm
5. Turbo casing = 5 mm
6. Compressor casing = 5 mm
7. Inlet casing cover = 5 mm

• Perform Volumetric mesh for the required volumes.

Given Model:

Procedure:

1. Load the Geometry, the first step is to do topo clean up. Look for single cons by turning it on and deleting the overlapping region.
2. For some components is difficult to get the correct surface finish, so it's better to do it in small sections by plotting hot points, like for below case;

3. Assign PID name

4. Check for single cons in Geometry checks and if no single cons are there move to the mesh part. In mesh give the quality criteria and target length as per the requirement.

5. Check that if all surfaces have meshed, if there is any unmeshed surface, meshed it.

6. After all surface mesh is done then go for volume mesh. Go to define and select auto-detect the whole database, you will get volumes detected by ANSA software.

7. Select the volume where the flow will take place and delete the remaining volume. Always check the selected volume before deleting.

8. Mesh the selected volume using TETRA-CFD.

Learning Outcomes:

• PID creation and PID assignment,
• Different selection techniques and visibility tools,
• Advanced Topology cleanup
• Advanced tools used in Surface mesh 

Results:

Surface mesh:

Turbo casing = 5 mm,Compressor casing = 5 mm,Inlet casing cover = 5 mm

Blade stage-1 = 1 mm,Blade stage-2 = 1 mm,Impeller = 2 mm Shaft rotor = 1 mm

Volume mesh:

  

Conclusion:

Here we performed surface mesh for turbocharger with target length as per component and then performed Volume mesh.