Well, if it is a bit of a trade secret I think we will not see you post many images. But that is OK, I think that I know where you are heading. With a combination of lift and drag it could be possible to control the speed, but it will take a lot of experimentation.
I don't know how much wind is in your area, but if you can build a real rotor and test it outdoors, the collected data would be more realistic.
If you are thinking about a design to be commercialized, the track record for commercial VAWT turbines is not very good. The last 20 years have seen manufacturers of VAWT's come and go like the waves of the ocean. They start small, pick up speed, and come to shore and crash. Then the next wave comes and do the same.
In my opinion, there is not a sustainable market for commercial VAWT's. They cost too much for the power that they produce. And people that can pay $15,000 for a turbine usually have the land to put a tower with a HAWT. But the biggest problem is, for the most part there is not enough clean winds at low altitude to produce any significant amount of power.
Still, there are some companies out there making money selling junk to gullible people. A Company in Missouri keeps selling not VAWT's but converted car alternators for people to mount on top of their houses. And he tells people that five or seven blades on the rotor are better than 3 blades. People should do some research before parting with their money and then having a bad experience and giving a bad name to wind power.
There is a lot of cynicism today about VAWT's, but I believe it is because of the aggressive marketing tactics, lies and exaggerated power ratings of the majority of manufacturers of Vertical turbines. The cynicism is not directed at the Vertical turbine itself. I think the majority of the users in this website don't care what device people use to produce energy. Some people use Horizontal turbines, some use Verticals, some use a water wheel or a generator mounted on a bicycle. There was a guy that built a small alternator that was gerbil powered. That was Dan Fink, I'm sure most people here know who he is.
I always encourage people to build something and start learning and generate a little power. For example one of my neighbors. He is about 50 pounds overweight and wanted to lose some weight. One evening he invited me over for a beer and started telling me about an idea he had to generate power and lose a few pounds. He wanted to build a flywheel with a generator attached to it and power it by gravity. He wanted to have a long chain with a lot of gears coming out of the attic window of his 2-story house all the way to the ground. His idea was to go out of the attic window, hook himself to the chain and slowly come down to the ground, using gravity to spin the flywheel. Then run back to the attic and do it again and again. He asked me what I thought of his idea. I took a long drink from my beer, looked him in the eye, scratched my head, and after a long pause I just changed the conversation. We started talking about less controversial subjects, like the politics in the U.S.
I didn't want to encourage him. I didn't want him to get hurt, but I think it was not a bad idea. It sounds crazy but he can't be crazy. After all, he is Canadian. There are no crazy people in Canada, only peaceful people that get along with everybody.
Concerning commercial VAWT's, in my opinion there are some that have a good design and could be efficient. For example there were two manufacturers that use the Gorlov helical blades, the X-Wind and the Quiet Revolution.
X-Wind, in my opinion was a great design. Too bad it went out of business two years ago. It was founded in 2010 by Michael Blaize, a French engineer who has spent most of his life trying to make race cars go faster and missiles more accurate. He designed a blade profile called the XWA-003 and applied for patents for it in a lot of countries.
I tried to find out what blade profile Quiet Revolution uses, but was not able to. I saw some information that alluded that the blade was a NACA 4412, but I think it was a conventional symmetrical NACA 0015 or 0012.
Quiet Revolution also hit the shore and crashed in 2014. Who's next?
Ed