practical 1 axial turbine

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April 30, 2009Inventory #002693

BladeModeler 14.0

Practical 1:

Axial Turbine Rotor

Practical #1: Axial Turbine



Training ManualConcepts

• In this tutorial we will:– Input the initial blade settings– In meridional view, modify the hub and

shroud curves and location of inlet– Define a leading and trailing edge type– Export the model to TurboGrid




Training ManualInitial 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 Normal axial is used.– Select the File | New | CFX-BladeGen Model menu

command or toolbar button which will display the Initial Meridional Configuration Dialog

– Select the Normal Axial tab– Enter the parameters for the initial blade layout

(shown on the following slide).– Be sure to select : Prs/Sct mode in the bottom right

corner– Press Enter or select the OK button to continue




Training ManualNormal Axial Turbine

• Design parameters to be entered for the Normal Axial Template:




Training ManualBlade Angles and Thickness

• Select blade angles and blade thickness as shown• Number of blades = 43




Training ManualOptimizing Meridional View• Optimizing the meridional view

– Very important operation in the meridional view is to define the shape of the hub and shroud curve, starting from inlet to the outlet

– The endpoints for these curves were specified when Initial Design Parameters were entered.




Training ManualOptimizing Meridional View

• There is an obvious need to adjust an inlet region and shroud curve

Desired :




Training ManualAdjustment of Inlet Section

• Maximize the meridional view window(Top-Left View Window)

• Double click the shroud inlet point (top left) and enter: -45 and 80 for the horizontal and vertical values. Click OK

• Double click the hub inlet point (bottom left corner) and enter: -45 and 60 for the horizontal and vertical values. Click OK.

• Leave outlet points at the hub and shroud as they are.




Training ManualBlade Shroud Curve

• Adjust Blade Shroud Curve– Left-click the blade’s shroud curve– Right-click the mouse and select:

Convert Points > Spline Curve Points…– In the Point Count Dialog, enter 5 points and select OK.– Drag points individually to obtain the desired shape of shroud curve

(see next slide)




Training ManualMeridional View

• After adjusting, the meridional view appears as shown:




Training ManualLE and TE Type Definition

• Prescribe the Leading/Trailing Edge Ellipse– Select Blade | Properties menu commands, or:– Click the toolbar button located on the left hand side of the CFX-

BladeGen window to set the blade properties. – Set the LE/TE Ellipse tab, adjust the values as shown on the next slide– All other values can remain unchanged.




Training ManualLE / TE Type




Training ManualModel Properties Dialog

• Set the model properties:– Model > Properties

Ensure Model Units are Set




Training ManualOn your own• Create a workflow involving

TurboGrid– Try meshing the geometry using

the ATM method (note you may need to enable beta features to perform this action – ask your instructor for details)

– Once the mesh is compete, go back to BladeGen and modify the design

• Update the project, and the TurboGrid mesh will reflect the most recent geometry

practical 1 axial turbine

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