Propeller Nozzle

Modelling a parametric ducted propeller based on 19A NACA-profile.

Establishing master sketch for NACA profile

1. Establish main input parameters in expressions
2. Construct origin for NACA profile
3. Create expressions for profile coordinates
4. Create points for inlet profile and add dimensions
5. Create spline on points
6. Test sketch robustness and scalability by changing propeller diameter (Dp)

Creating sketch for nozzle cross section

1. Create a new sketch and project the spline curve into the new sketch
2. Construct the remaining sketch geometry. Make sure its a closed profile

Creating 3D-geometry – Wet surfaces

Designing detail structure

1. Create new sketch in XY-plane
2. Link curves from master sketch into the sketch
3. Convert R1 and R2 curves to reference geometry.
4. Draw circles for R1 and R2 constrained to center point and diameter.
5. Create lines for internal rings and add dimensions.
6. Exit sketch and test sketch scalability again by changing propeller diameter, DP
7. Use revolve to create plate geometry by selecting single curve and offset to add thickness.