Volumetric meshing the turbocharger by using ANSA

Volumetric meshing the turbocharger for CFD applications.

The below procedure shows how the volumetric meshing and geometry clean up is carried out for the given model.

Step:1

Import the given model:

Importing the model in the ENT mode this can convert into PID mode.

After that model can convert it into wireframe mode.

Checking the given geometry errors:

The above figure shows checking the geometry error, in this case, there is no error is formed.

Given geometry in the wireframe mode:

In this mode, we are finding the error of the geometry that can show in the red in colors this can be solved.

Step 2:

Creating the surfaces:

This image shows the incomplete surface this can be filled by using the surface-> coons in that fitted. After that it formes the complete surface.

This geometry shows creating hot points. This hots point helps to create a closed surface.

In this geometry, we are creating a closed surface by using the surface-> coons before creating the surface we creating the hot points, this helps while creating the closed surface. Hot points are created by using the hot points-> parametrical -> give the distances.

Step 3:

Deleting the extra surfaces, overlapping surfaces, and interesting surfaces.

This is the overlapping surface this can not be interesting to each other surfaces this can be made to interesting by using the projet selecting the cons and select the faces.

After that new surface is created this can be deleted as shown in the figure.

The above figure shows that interesting the surfaces, this case intersects the object by using faces->interset. This allows the interset between two object faces. After intersecting the objects delete the unwanted object by using the delete.

Step 4:

Interfacing the models:

In this case, the shaft rotor is not properly interfaced between the rotor and blade stage this can element by using the COONS -> Project. This helps to interface the two models.

Fig: After deleting the extra part.

Fig: Shows the extra part, this can be deleted by using the delete.

Combining the two rotor shafts together by giving the same property id.

Step 5:

This geometry shows the error-free model.

Step 6:

Closing the volume for defining the property ID for the model.

After defining the property ID for the model.

After defining the property ID for the model surface mesh is carried out. According to the given element size for the models.

Step 7:

Mesh generation:

Fig: Compressor Casing

Fig: Turbo casing

Fig: Impeller

Fig: Inlet Casing cover

Fig: Blade stage 1

Fig: Blade stage 2

Fig: Closed surfaces

Fig: Complete mesh model

Step 8:

Intersecting the shaft:

This image shows the interfacing rotor into the compressor casing this case layers are formed on the surface of the rotor, after interfacing the surfaces this extra surface is deleted. This same case is happening inside the turbo casing the same procedure is followed to deleting the extra surface.

Step 9:

Patch creation:

Mesh mode -> Hot points -> Mark/Unmark

Mark on the surface hot points are formed after inserting the hot points becomes hot spots are formed. These hot spots are joining together the patch is created.

While creating the patch instead of using the above procedure we use TOPO module -> Faces -> cut.

Step 10:

Volumetric mesh:

After creating the surface mesh we move to volume mesh.

Volume module -> Define. in that defining the which model effect the volume of the fluid.

After defining the required volume unwanted volume is deleted.

The below figure shows the volumetric mesh.

Unstructured mesh -> Tetrahedral mesh -> Volumes -> select all -> conform. Tetrahedral mesh is used for CFD applications

The below figure shows the cut section of the volumetric mesh.

Conlusion:

1. Geometry clenup is carried out by removing the all the errors, interfacing components and overlaping components.

2. Volumetric mesh is done by using the Tetrahedral mesh and using the above procedure.