Week 3 Challenge : CFD meshing on Turbocharger

Aim:

• To check for the geometrical errors to make appropriate volumes.

Case 1:

• Create and assign PIDs . 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

Case 2:

• Perform Volumetric mesh for the required volumes.

Procedure:

• Open ANSA import the Turbocharger model in the geometry window.

• Go to checks -geometry to identify the error.

• Correct the errors by creating new face and using fill hole option and delete overslap faces and triple cons.
• Create and assign approprite PIDs.

Turbocharger:

Blade stage_1:

Blade stage_2:

Rotor Shaft:

Impeller:

Turbo Casing:

Inlet Casing Cover:

Bottom Casing Inlet:

Bottom Casing Outlet:

Compressor Casing:

Casing Inlet:

Casing Outlet:

• Then go to classical mesh change the mesh parameter and quality criteria as follows. And change the type ino tria.
• And then go to generate mesh-Spot mesh Select the appropriate PIDs and generate the mesh.

Surface mesh:

Mesh size = 1 mm

Type = Tria

PIDs = Blade stage_1, Blade stage_2 and Rotor shaft.

Quality Criteria:

Mesh parameter:

Mesh size = 2 mm

Type = Tria

PIDs =Impeller

Quality Criteria:

Mesh parameter:

Mesh size = 5 mm

Type = Tria

PIDs = Turbo Casing, Casing Inlet, Casing Oulet, Inlet Casing Cover, Compressor Casing, Bottom Casing Inlet, Bottom Casing Outlet.

Quality Criteria:

Mesh parameter:

• After the surface mesh go to volume mesh define the volumes to be meshed.

• Keep the required volumes delete other.

• Change the structure into Tetra CFD.

• Then generate the Voume mesh.

Volumetric Mesh: