Week 3 Challenge : CFD meshing on Turbocharger

Aim:- To perform CFD meshing on Turbocharger

Tools used:- Surfaces, face, fill hole, symmetry, Intersect, Project.

Procedure:-

1) Import the downloaded geometry into ANSA.

2) Geometry cleanup

a) Delete overlapping surfaces.

b) Delete extra surface and create new coons surface.

b) At turbine casing half casing is missing to complete it, do symmetry by clicking on transform > Copy> select entity> symmetry option > providing mirror plane > click on middle mouse button.

c) Intersect two surface and delete the extra surface.

d) Make connection between rotor shaft and compressor / turbine casing by projecting cons of overlapping surface on rotor shaft and deleting that part of shaft and do topo over that part then we can see triple cons there which make connections.

e) Cover open part on compressor casing and turbine casing by creating coons surface on them and make watertight geometry.

f) Do geometry check and remove single cons and try to reduce triple cons wherever available.

3) Make different PIDs like Compressor casing, turbine casing , blade 1, blade 2, impeller, rotor shaft, inlet/ outlet compressor casing and turbine casing.

4) Remove extra PIDs which is not required, by compressing them.

5) Meshing:-

SURFACE MESHING

a) Go to mesh deck

b) Perform meshing on different PIDs by assigning different target lengths as given in the problem statement.

c) To perform meshing on different PIDs, apply target length on specific PID do spot mesh and freeze that PID then go to different PID and follow same step as stated above.

d) After meshing in all PIDs, unfreeze them by clicking on unfreeze option and do box selection by right clicking.

VOLUMETRIC MESHING

a) Go to v.mesh then click on define option.

b) List of Volumes appear, check all the volumes which are required and which are not.

c) Delete all the not required volumes i.e., thickness of casing, rotor shaft, blade, impeller.

d) we require only those volume where fluid has to flow so keep those volumes and perform meshing on them only.

e) Select required volumes and perform tetra rapid type of meshing on them.

6) Check the volumetric mesh by cross section view.

Result:- CFD mehsing on turbocharger is done.

1) Surface meshi on compressor and turbine casing showing nodal length.

2) Surface mesh on rotor shaft , impeller and blade showing nodal length

3) Volume mesh

Cross section view

4) GOOGLE DRIVE LINK:- https://drive.google.com/drive/folders/1YvEqhlp1QfBXa_DdJb9yTZNd9NUl_Lo6?usp=sharing