Propeller hub and tip loss factor, how are t1, t2, t3, h1, h2, h3 tuned?

[jphkun]

Hi everyone,

I am trying to simulate a rotor in hover with FLOWUnsteady. It occurred to me that the hub and tip loss factors have quite a significant impact on the solution.

The best information that I have found is a comment of the developer himself #98 (reply in thread)

In Section 6.2.1 of the thesis, it is explained how are the tip and hub loss factor computed and here is the link to the code implementation.

Indeed all parameters are described, but it is stated that: "t1, t2, t3, h1, h2,
and h3 are tunable parameters". How are they tuned exactly? What could I use for my current hover case? Is there any resource on the topic? Open-source or closed source tools, book, papers, articles? Anything would be really appreciated!

Many thanks in advance, all help will be really appreciated !