Can I model a propeller as a turbine just by changing the value of coefficients like loading coefficient, thrust coefficient,etc to negative given that they rotate at same RPM and have similar flow conditions. I went through some resources online and they followed a similar approach of actuator disk just like they did for wind turbines. The only difference I saw was things getting reversed, i.e. the stream tube getting narrower downstream,etc. Please help
They are basically same approach. I think that the following document can help you.
http://www.southampton.ac.uk/~jps7/Aircraft%20Design%20Resources/Sydney%20aerodynamics%20for%20students/propeller/prop1.html
http://www.icas.org/ICAS_ARCHIVE/ICAS2010/PAPERS/434.PDF
Details are different, like selecting the optimal aerofoil shape is different, but fundamentals are same. The control volume mass, momentum and energy balances are exactly the same except signs of change.
The underlying theory is the same, the applications are different. Having said that I recommend that at least you compare the difference that the two densities (air and water) impose on them.
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