On page Setup one can specify some basic settings.
In manual dimensioning mode the main dimensions and blade angles are not calculated by CFturbo. All these values are user-defined input values.
Design a shrouded (closed) or unshrouded (open) runner.
For an unshrouded runner one must define the tip clearance, optional different values at inlet and outlet.
Design the runner with or without splitter blades.
The material density of the impeller is an informational value that is not relevant for the hydrodynamic design but is used for the calculation of moments of inertia. Density values can be directly entered or selected from a list by pressing the settings button next to the input area.
For the determination of the inlet swirl either of the following options can be used:
▪outlet swirl of the upstream component,
▪absolute inlet flow angle α1,
▪relative inlet flow angle β1,
▪outlet swirl velocity cu2 in accordance to the Euler equation: .
When creating a new design the initial default settings for some important properties are displayed in the panel Initial default settings. These settings are used in further design steps and can be modified by selecting the Change settings button. Of course these default settings can be modified manually in the appropriate design steps. See Preferences: Impeller/ Stator settings for more information.
Some design point values are displayed in the right Information panel when selecting the page Values (see Global setup).