This gives you a 3D curve definition that can be used for impeller design e.g. for turbochargers and pumps.

Input to this feature are a camber surface, a leading edge and trailing edge thickness as well as an ellipse factor for the leading edge (to create circular but also ellipse-like leading edges). The curve is created normal to the given camber surface.

You can use this curve to create linear blade surfaces, but also for more complex shapes by using it together with meta surfaces.