Simulation Of Small Wind Turbine Blade Based On The S822 And S823 Aerofoil

Wind energy is a kind of cleanness,cheapness,reserves richness renewable energy.Using wind energy is an effective approach to improve world energy crisis and to ensure economy continual development. So wind energy is been regarded more and more for its cleanness and renewable using .Because the blade is the key part of a wind turbine, its characteristic decide the cost,the life and getting power ability of the wind turbine. Through 2-D and 3-D simulating for S822 and S823 aerofoil of American SERI aerofoil series, study pneumatic characteristic and pressure distributing of this two aerofoils under the different station.The main results achieved are as following:1. Simulating S822 and S823 aerofoil in 2-D mode to get pneumatic characteristic of this two aerofoil, including pressure distributing,liquid distributing around the aerofoil and the curves of c₁-αand c₁/c_d-α.All of these provide reference for the designer.2. Study a Gurney flap's effect to an aerofoil through simulating the S823 airfoil and with a Gurney flap when wind flows around it. From the result we know that the Guraey flap improves the pressure distributing on the airfoil so that it has a higher pressure on the positive pressure area and lower pressure on the negative pressure area. So the c₁ and the c₁/c_d increase obviously when the airfoil adds a Gurney flap. And the best height of the Gurney flap is 0.004c.3. Base on the wind energy generate electricity basic theory, using S822 and S823 aerofoil to design a family blade, which can satisfy the need of pneumatic characteristic and material intensity. Any more, it also can reduce the noise and the sensitivity of the blade surface effectively.4. Through simulating the S822 and S823 family blade in 3-D mode to know the pressure distributing and liquid distributing around the blade; we also know where the burble appear ,which is accord with the vortex theory of Glaurt.5. Do some experiment about the glass steel used by the blade .After pre-treating the fiberglass,appending different deal treating druggery and putting the sample in the water ,test these factor's effect on the sample, which provide reference for the designer.