Abstract
A design method using the Bézier technique is described for representing axial turbomachine blade camber surfaces. The method uses cubic Bézier curves representing 2D blade profiles (blade developed views) for a number of blade sections to generate a blade camber surface of the type used in a rectangular cascade. This blade camber surface is then transformed to obtain another blade camber surface in a circular cascade between hub and shroud surfaces of revolution of an axial turbomachine. It is then shown that blade camber lines inherit the geometric properties of corresponding blade profiles. Derivatives of the blade camber surface which are likely to be used in generating NC cutter paths for use in milling dies for fabricating the blades are also included.
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