Hi friends:

Im just finishing a Propeller design and analisys software that could be of your interest, and could be my modest contribution to this project.

It works by the very well known Blade Element and Momentum Theory, taking into account the Prandtl model for tip loss calculation.

Calculations take into account enviromental variables such as temperature and depth, as well as, fluid properties.

Compared with a CFD, its results are good enough.

Anyway, it would be worth for nothing without a lot more use, testing and comparison of results.

As the simplified BETM starts from the "small angle" and hence, constant Cl slope hypothesis, which in our case, are not really valid assumptions, this software reads Hydro/Aero-dynamic coefficients from a Polar Curves file.

Its now full functional, and only the "Manual" input of Prop and Profile datas is still on course.

The software has been designed for reading those datas from standard .CSV files, that manuel part is only an add, not needed for making it work.

Soft output are:

Thrust & Torque vs RPM

Thrust and Torque vs SPEED (Advance velocity)

Propeller efficiency vs RPM or SPEED

Thrust and Torque coefficients vs J

Cavitation number vs logarithm (critical pressure coefficient)

Radial pressure distribution (Blade stress)

Cavitation analisys

All above graphic and in tables.

EDITION capabilities:

The whole propeller geometry can be changed inside the program.

Tables can be directly cut and pasted on Excel.

If it could be of any interest for this project, I'd have no inconvenience publishing it for free.

My sincere congratulations for this nice and interesting project.

Best wishes and regards

- Ion -