Well, how about some paper models? I had some interesting learnings from paper models. I had an experience with a silly paper model: I was fooling around with a 2-blade version folded a few different venturi types; the best was the sharpest one like my second picture.
Yes I understand and agree on your visualization, but just before tsr=1 pressure builds up in the venturi and is almost equal to the downside pressure. Pressure builds up because the rotor spines around and the leading site of the venturi gasp air. This means that the wall of wind is there, but it is the last stage before tsr=1. Maybe if you sharpen the swail the rotor exceeds tsr=1 just a bit faster.
You already mentioned "It hard to visualize and consider what going to happen with these things because it's so different for at various rpm and even during a single rotation at various rpm." We need someone who can make a computer simulation for this type of problem.
Did you noticed that we where actually making a sequence movie with our pictures?
- : your below tsr 1 picture
- : my first picture
- : your above tsr 1 picture
- : my second picture
have lots of fun, I think I need to make a few paper models.
Ray