1. 2006 International ANSYS Conference BladeModeler Demonstration Creating a Centrifugal Compressor Impeller Workshop 20 ANSYS CFX 11.0

2. Workshop ANSYS v11.0 2006 International ANSYS Conference 5/1/2006 © 2006 ANSYS, Inc. Inventory #002307 WS20-2 BladeModeler In this demonstration, you will: –Create a centrifugal compressor impeller –Export the necessary files for TurboGrid –Add fillets to the impeller solid

3. Workshop ANSYS v11.0 2006 International ANSYS Conference 5/1/2006 © 2006 ANSYS, Inc. Inventory #002307 WS20-3 About BladeModeler BladeModeler is a new blade geometry creation product (Windows OS only) that consists of three components: –BladeGen – Blade creation and editing tool –DesignModeler – Workbench CAD solid modeler –BladeEditor – Add-In to DesignModeler that can import and convert BladeGen geometry into a solid model BladeModeler BladeGen DesignModeler BladeEditor

4. Workshop ANSYS v11.0 2006 International ANSYS Conference 5/1/2006 © 2006 ANSYS, Inc. Inventory #002307 WS20-4 Starting BladeModeler Start Workbench –Start > Programs > ANSYS 11.0 > ANSYS Workbench –On the Start Page, select Blade Geometry

5. Workshop ANSYS v11.0 2006 International ANSYS Conference 5/1/2006 © 2006 ANSYS, Inc. Inventory #002307 WS20-5 Vista CCD A new feature of BladeModeler is the Vista 1D design codes –To use the compressor design code, select File > New > Vista Centrifugal Compressor Design

6. Workshop ANSYS v11.0 2006 International ANSYS Conference 5/1/2006 © 2006 ANSYS, Inc. Inventory #002307 WS20-6 Vista CCD design Switch to the Compressor Duty tab –Set overall pressure ratio to 4 –Set rotational speed to 80 000 rpm –Click Calculate Meridional view updates after calculate

7. Workshop ANSYS v11.0 2006 International ANSYS Conference 5/1/2006 © 2006 ANSYS, Inc. Inventory #002307 WS20-7 Splitter Blade Note on the Geometry and Inlet Gas Angles tab, the number of intervanes is equal to the number of main blades –This means our impeller will have one splitter blade per passage Click New Model to build the model When prompted, save geometry as filename impeller1.bgd

8. Workshop ANSYS v11.0 2006 International ANSYS Conference 5/1/2006 © 2006 ANSYS, Inc. Inventory #002307 WS20-8 Geometry Imported into BladeGen Meridonal View Blade to Blade View Thickness View Angle View

9. Workshop ANSYS v11.0 2006 International ANSYS Conference 5/1/2006 © 2006 ANSYS, Inc. Inventory #002307 WS20-9 Modify Blade Thickness Modify the Blade Thickness at the shroud Click this dot to switch to the shroud profile Drag this line to 0.7

10. Workshop ANSYS v11.0 2006 International ANSYS Conference 5/1/2006 © 2006 ANSYS, Inc. Inventory #002307 WS20-10 Modify Blade Thickness Thickness profile and blade to blade view should now look like this:

11. Workshop ANSYS v11.0 2006 International ANSYS Conference 5/1/2006 © 2006 ANSYS, Inc. Inventory #002307 WS20-11 Join Hub Curve To facilitate creating a fillet in DesignModeler, join the middle and downstream hub segments: –Select the point at the intersection of the hub and trailing edge in the meridional view –Right click > Segment Operations > Join Segment at Point Point to Select

12. Workshop ANSYS v11.0 2006 International ANSYS Conference 5/1/2006 © 2006 ANSYS, Inc. Inventory #002307 WS20-12 Create TurboGrid Files TurboGrid is used to create a high quality, hexahedral mesh for CFD Export the data for TurboGrid –File > Export > TurboGrid Input Files… –Four TurboGrid files will be created.inf file containing machine info Hub, shroud, and profile curve files –Click OK to write the files See TurboGrid demonstration for more details on the power of using TurboGrid!

13. Workshop ANSYS v11.0 2006 International ANSYS Conference 5/1/2006 © 2006 ANSYS, Inc. Inventory #002307 WS20-13 Save the Blade Design Click File > Save to save the geometry Switch back to the Project tab Save the Workbench project –File > Save As –Filename: Impeller1.wbdb

14. Workshop ANSYS v11.0 2006 International ANSYS Conference 5/1/2006 © 2006 ANSYS, Inc. Inventory #002307 WS20-14 DesignModeler Next, we will create the blade geometry using BladeEditor. Click New geometry on the project page

15. Workshop ANSYS v11.0 2006 International ANSYS Conference 5/1/2006 © 2006 ANSYS, Inc. Inventory #002307 WS20-15 DesignModeler Select mm as the unit type:

16. Workshop ANSYS v11.0 2006 International ANSYS Conference 5/1/2006 © 2006 ANSYS, Inc. Inventory #002307 WS20-16 BladeEditor Click the BladeEditor icon The file Impeller1.bgd should appear in the open window by default Select OK

17. Workshop ANSYS v11.0 2006 International ANSYS Conference 5/1/2006 © 2006 ANSYS, Inc. Inventory #002307 WS20-17 BladeEditor In the details view: –Change Hub Offset to 2 Click Generate

18. Workshop ANSYS v11.0 2006 International ANSYS Conference 5/1/2006 © 2006 ANSYS, Inc. Inventory #002307 WS20-18 BladeEditor Impeller Geometry Created –Solid Part –Fluid Domain

19. Workshop ANSYS v11.0 2006 International ANSYS Conference 5/1/2006 © 2006 ANSYS, Inc. Inventory #002307 WS20-19 DesignModeler The solid geometry could be sent to Simulation for structural analysis The fluid domain could be sent to CFX-Mesh or ICEM for meshing Try on your own: –Add a fillet to the blade –Modify the hub inlet