1. Version 1.0 3/23/2007 © 2007 ANSYS, Inc. All rights reserved. Inventory #002498 W8-1 BladeModeler 11.0 ANSYS, Inc. Proprietary BladeModeler 11.0 Practical 8: Radial Turbine Rotor

2. Version 1.0 3/23/2007 © 2007 ANSYS, Inc. All rights reserved. Inventory #002498 W8-2 BladeModeler 11.0 ANSYS, Inc. Proprietary Training Manual Concepts In this tutorial we will: – Input initial design parameters – Input initial angle/thickness parameters – Optimize the meridional view – Adjust the blade angles – Define the shape of LE and TE – Save your work

3. Version 1.0 3/23/2007 © 2007 ANSYS, Inc. All rights reserved. Inventory #002498 W8-3 BladeModeler 11.0 ANSYS, Inc. Proprietary Training Manual Initial Design Parameters CFX-BladeGen allows the user to create a blade system from scratch, using one of six standard initial configuration types. For this example, a Radial Turbine is used. – Select the File | New | CFX-BladeGen Model menu command or toolbar button which will display the Initial Meridional Configuration Dialog – Select the Radial Turbine tab – Enter the parameters for the initial blade layout (shown on the following slide). – Be sure to select Ang/Thk mode in the bottom right corner – Press Enter or select the OK button to continue

4. Version 1.0 3/23/2007 © 2007 ANSYS, Inc. All rights reserved. Inventory #002498 W8-4 BladeModeler 11.0 ANSYS, Inc. Proprietary Training Manual Design Parameters Design parameters to be entered for the Radial Turbine Template:

5. Version 1.0 3/23/2007 © 2007 ANSYS, Inc. All rights reserved. Inventory #002498 W8-5 BladeModeler 11.0 ANSYS, Inc. Proprietary Training Manual Initial Angle/Thickness Enter Initial Angle/Thickness Parameters: – Nominal wrap angle of -28° – Thickness of 0.2 in – Number of blades: 10 – Click OK

6. Version 1.0 3/23/2007 © 2007 ANSYS, Inc. All rights reserved. Inventory #002498 W8-6 BladeModeler 11.0 ANSYS, Inc. Proprietary Training Manual Meridional View Optimization Optimizing the Meridional View – Inlet and Outlet location (points) are well positioned so that there is no need for any adjustments

7. Version 1.0 3/23/2007 © 2007 ANSYS, Inc. All rights reserved. Inventory #002498 W8-7 BladeModeler 11.0 ANSYS, Inc. Proprietary Training Manual Blade Angles at the Hub The Hub Layer is active by default (red dot) – Right-click in the Angle view and select: Adjust Blade Angles – In the Leading Edge tab, enter 0º for the Beta value. Tang. Beta automatically becomes 90º. Leave all the other values as they are. – In the Trailing Edge tab, enter a Beta angle of -23º. Leave all other values as they are. – Click OK

8. Version 1.0 3/23/2007 © 2007 ANSYS, Inc. All rights reserved. Inventory #002498 W8-8 BladeModeler 11.0 ANSYS, Inc. Proprietary Training Manual Blade Angles at the Shroud Activate the Shroud Layer by clicking the black dot at the top of the layer column (it will become red) – Right-click in the Angle view and select: Adjust Blade Angles – In the Leading Edge tab, enter 0º for the Beta value. Leave all the other values as they are. – In the Trailing Edge tab, enter a Beta angle of -53º. Leave all other values as they are. – Click OK

9. Version 1.0 3/23/2007 © 2007 ANSYS, Inc. All rights reserved. Inventory #002498 W8-9 BladeModeler 11.0 ANSYS, Inc. Proprietary Training Manual Blade Angle Distribution In order to get well shaped beta angle distribution, right click in the Angle view and select Beta Definition Right click again and select: Convert Points > Spline Control Points ( 5 Pts ) After the blade angle adjustments, the angle distribution on the hub and shroud will look like as presented below: Hub Shroud

10. Version 1.0 3/23/2007 © 2007 ANSYS, Inc. All rights reserved. Inventory #002498 W8-10 BladeModeler 11.0 ANSYS, Inc. Proprietary Training Manual Blade Thickness Profile Blade Thickness can be defined in the Thickness view. In this example, the blade thickness is considered constant and there is no need for any adjustments.

11. Version 1.0 3/23/2007 © 2007 ANSYS, Inc. All rights reserved. Inventory #002498 W8-11 BladeModeler 11.0 ANSYS, Inc. Proprietary Training Manual Shape of Leading/Trailing Edge To prescribe the Leading/Trailing Edge Shape: – Select Blade | Properties menu commands or the toolbar button located on the left hand side of the CFX-BladeGen window to set the blade properties. – Set the values on LE/TE Ellipse tab as shown on the next slide – All other values can remain unchanged.

12. Version 1.0 3/23/2007 © 2007 ANSYS, Inc. All rights reserved. Inventory #002498 W8-12 BladeModeler 11.0 ANSYS, Inc. Proprietary Training Manual Blade Property Dialog Select LE Type to be Cut-off Select TE Type to be Ellipse with appropriate TE Elliptic Ratios

13. Version 1.0 3/23/2007 © 2007 ANSYS, Inc. All rights reserved. Inventory #002498 W8-13 BladeModeler 11.0 ANSYS, Inc. Proprietary Training Manual Model Properties Dialog Set the model properties: – Model > Properties Ensure Model Units are Set

14. Version 1.0 3/23/2007 © 2007 ANSYS, Inc. All rights reserved. Inventory #002498 W8-14 BladeModeler 11.0 ANSYS, Inc. Proprietary Training Manual Saving the File Save the file – File > Save As or the Save As icon – Filename: RadialTurbineRotor.bgd Go back to the Project page and open DesignModeler (click New geometry) – Use the same units that were defined in BladeGen (mm)

15. Version 1.0 3/23/2007 © 2007 ANSYS, Inc. All rights reserved. Inventory #002498 W8-15 BladeModeler 11.0 ANSYS, Inc. Proprietary Training Manual BladeEditor Click the BladeEditor icon – Accept the default file RadialTurbineRotor.bgd – We want the fluid domain for a CFD analysis – In the Details View Change Hub Offset to 2 mm Set Create Blades to 1 Click Generate – Save the model RadialTurbineRotor.agdb

16. Version 1.0 3/23/2007 © 2007 ANSYS, Inc. All rights reserved. Inventory #002498 W8-16 BladeModeler 11.0 ANSYS, Inc. Proprietary Training Manual Suggestions for Extra Work This concludes the tutorial Extra things to try on your own: – Mesh the fluid volume in CFX-Mesh – Go back to BladeGen and modify the blade angles Save the new model with the same filename Re-Generate the new model in DesignModeler (just click the Generate icon!)