### 9.1.10. Glossary

The following definitions describe common terms used in BladeGen.

Term | Description
--- | ---
Stream | The distance along a streamline from the leading edge to the trailing edge. Usually expressed as a fraction between 0 and 1.
Span | The distance between the hub and shroud, expressed as a fraction between 0 and 1.
Pitch | The distance between two adjacent main blades (theta), expressed as a fraction between 0 and 1.
Streamwise | In the stream direction.
Spanwise | In the span direction.
Pitchwise | In the pitch direction.
Hub Curve | The meridional curve nearest the centerline of rotation that defines the inner fluid flow surface.
Shroud Curve | The meridional curve farthest from the center of rotation that defines the outer fluid flow surface.
Streamline | A meridional curve between the hub and shroud. Usually at a fixed span position.
Layer | Used to refer to the blade geometry data along a streamline. The definition is now extended to accommodate other curves that generally run in the streamwise direction.
Meanline | A curve along the center of a blade, on a layer, where the surfaces of the blade are described by an offset on each side of the curve.
Camberline | Same as Meanline.
Side1 | The side of the blade encountered when moving from the meanline in the negative theta direction (right hand rule).
Side2 | The side of the blade encountered when moving from the meanline in the positive theta direction (right hand rule).
Normal Thickness | The old term used to describe Normal Layer Thickness.
Normal Layer Thickness | The thickness applied along a vector on the layer surface and normal to the meanline.
Normal Camber Thickness | The thickness applied normal to the camber surface (normal to the meanline and spanwise curves).
Tangential Layer Thickness | The thickness applied along a vector on the layer surface in the tangential direction.
Working View | A working view is a view that is used to control the design. These include the Meridional, Angle, Thickness, and Pressure/Suction Views.
Auxiliary Views | A auxiliary view displays data for review but does not provide functionality to modify the design directly.

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