Hub and shroud are represented by the segment of a circle and a tangential straight line. The radius of the segment is defined by Point 1. The points 0 and 2 are defining the axial position of the meridional contour.

 

The points 0 and 2 of the leading edge can be moved on hub and shroud contour. The angle of the leading edge on the shroud contour can be numerically determined using point 0. Point 1 can be moved freely between points 0 and 2. The values for the angles ζ1 and ζ2 as well as their relative position can be determined numerically.

 

 

For an automatic primary design of the contours the following values are used:

 

The manipulation of the contours can be achieved by shifting the positions of the points. As an alternative the position of points can be realized by input of numerical values. By moving points 0 or 2 the whole geometry can be moved in axial direction.

 

 

There are some reasonable constraints when working in this simplified mode e.g. the inclination angle of the trailing edge can only be set when hub and shroud are in Bezier mode both.

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