Week 3 Challenge : CFD meshing on Turbocharger

Aim

To do a mesh on the given model and check for the geometrical errors to make appropriate volumes and to create and assign PIDs. To 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

and also to perform Volumetric mesh for the required volumes.

Procedure

1) Import the given model into ANSA

2) Perform geometry checks

3) After fixing all the error continue to next step.

The triple cons are present to retain the feature of the component.

4) Before starting with the meshing apply the PID's to the model

Entire component after doing repairs and closing the holes to perform CFD analysis

5) Meshing

A) For Turbo casing, Compressor casing andInlet casing cover 

1) To mesh select the meshing module, select the Length under Perimeters and give 5 mm as Perimeter and in Macros.

2) In the meshing parameter give Maximum target length as 7 mm and Minimum target length as 3 mm, for mesh type select Tria.

3) In the quality criteria give Maximum target length as 7 mm and Minimum target length as 3 mm. 

4) The maximum and minimum length is given as + 2mm as upper deviation and -2 mm as lower deviation.

B) For Blade stage-1, Blade stage-2 and Shaft rotor

1) To mesh select the meshing module, select the Length under Perimeters and give 1mm as Perimeter and in Macros.

2) In the meshing parameter give Maximum target length as 1.5 mm and Minimum target length as 0.5 mm, for mesh type select Tria.

3) In the quality criteria give Maximum target length as 1.5 mm and Minimum target length as 0.5 mm. 

4) The maximum and minimum length is given as +0.5 mm as upper deviation and -0.5 mm as lower deviation.

C) For Impeller

1) To mesh select the meshing module, select the Length under Perimeters and give 2mm as Perimeter and in Macros.

2) In the meshing parameter give Maximum target length as 3 mm and Minimum target length as 1 mm, for mesh type select Tria.

3) In the quality criteria give Maximum target length as 3 mm and Minimum target length as 1 mm. 

4) The maximum and minimum length is given as + 1mm as upper deviation and -1 mm as lower deviation.

Results

External surface After doing shell mesh

 

After extracting fluid domain, then performed the volume mesh