Unfortunately I did not find precise reports about Altaeros and similar devices, with wind speed, turbine diameter and so on.
As I mentioned, it is difficult to reconcile aerodynamic lift and enhanced wind power in flight by shroud effect. That said, some Altaeros photos show a slightly asymmetrical device with an intrados and an extrados.
I think that the drawing above would only make things worse, by increasing the drag, and forcing the air flows towards the extrados and towards the intrados to meet at the trailing edge almost without going through the tunnel. So the turbine, which seems tiny compared to the whole, could not be sufficiently powered. And the construction would be even more complex because of the shape.
I think that in all cases it is not advantageous to reconcile the two functions of shroud and aerodynamic lift.
This is the reason why, having noticed the wind accelerating effect of a well-sized tire that I tested in different conditions, it seemed more judicious to me to separate the shroud effect from the aerodynamic lift which is provided by a kite or a Flettner rotor, leading to simpler elements (torus, and lifter).
Different possibilities, including crosswind and static kites, are described on Flexible kite carrying a turbine within a torus-shaped balloon (Experiment Findings, DOI 10.13140/RG.2.2.29622.00320).