Can deflector design improve turbine blade wind flow?

In recent years, various techniques for deflector installation and modified designs have been reported [ 22 ]. Many of these designs have been reported with validated simulations and have contributed to turbine blade wind flow improvements.

Where should a deflector be placed in a wind turbine?

The deflector was placed at about x d = 50 mm away from the central axis of the wind turbine (radius of the generator, r g = 50 mm). To determine the effect of deflector placed below the bottom of the wind turbine, different vertical distances, y d were used (50 mm and 100 mm).

Can a wind deflector be installed between two vertical axis turbines?

Similarly to the design shown in Figure 9 reported by [ 78 ], they can be modified to install a wind deflector between two vertical-axis turbines, utilizing the accelerated wind speed in the near wake region from both sides of the deflector.

What is flat plate wind deflector in helical vertical axis turbine?

Flat-plate wind deflector in helical vertical axis turbine. ( a) Design. ( b) CFD analysis. ( c) Installed deflector (adapted from [ 78 ]). The helical vertical axis wind turbine is lift-based instead of drag-driven; for such turbines, the important parameters of the deflector may not be exactly the same as in Savonius design.

Can a passive deflector improve wind turbine performance?

This deflector redirects wind from all directions into the blades, enhancing performance by up to 25 percent in all wind situations. Tian et al. (Tian et al. 2022) proposed a passive deflector to increase the performance of Savonius wind turbines using CFD simulations.

How do wind deflectors work?

Flat-Plate Wind Deflectors Wind deflectors can be installed to maximize overall performance in two ways: by accelerating the speed of the wind approaching the rotor blades or by reducing the air resistance from the returning blades; however, it can be a combination of both approaches as well.