Secondary flow path

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Secondary flow path

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Secondary flow path for impellers can be designed by selecting the "Secondary flow path" page on top left and activate the feature on the right side. Initial contours will be visible, which can be manipulated using the control points and the context menu of the curve. (see Hub/Shroud solids). Endpoints of the "secondary flow path" on the solid are constrained to the solid contour. The context menu of those points provide "Edit z value" and "Edit r value".

After the model finishing the meridional primary and secondary flow paths are connected to a single solid geometry, "Meridian.Fluid domain".

Hub & Shroud casing can be designed by manipulating their meridional contours. The feature is available if the following prerequisites are fulfilled:

Solids must be activated for this impeller

Neighboring static components have to exist

An offset between impeller and neighboring components is required

Depending on settings of main dimensions, some parts of the contour can become inactive, e.g. for unshrouded impellers the shroud is already defined by primary flow path.

Possible warnings

Problem

Possible solution

Missing static component at inlet/outlet. Both, upstream and downstream component to impeller are necessary.

There has to be a component at the impeller's inlet/outlet for designing a Secondary flow path.

Add a component to the impeller's inlet/outlet.