Vane airfoil profile of low power wind driven generator

Abstract

The invention discloses a vane airfoil profile of a low power wind driven generator, which is designed by adopting biological airfoil profile simulation technology and fluent software numerical simulation. The ratio of the maximum thickness d of the vane airfoil profile and the chord length c of the airfoil profile is d/c =9.83 percent. The maximum thickness position is x d /c =23.4 percent. The ratio of the maximum camber f of the airfoil profile and the chord length c of the airfoil profile is f/c=9.91 percent. The maximum camber position is the chord length part of x f/c=43.6 percent. Xd is the horizontal ordinate value of the maximum thickness part of the airfoil profile. Xf is the horizontal ordinate value of the maximum camber part of the airfoil profile. The coordinate axis origin is the front edge point of the airfoil profile. The horizontal ordinate x axis is superposed with chord length c and the direction points to the back edge of the airfoil profile from the front edge of the airfoil profile. Compared with the traditional conventional airfoil profile, the maximum thickness position xd and the maximum camber position xf of the invention are moved back and the invention has better lift efficiency and higher lift drag ratio. That is to say, the performance of the invention is improved on the whole.

Description

technical field The invention relates to an airfoil of a wind power generator, in particular to a blade airfoil of a low-power wind power generator, which is designed for the special requirements of relatively small generating power. Background technique With the gradual expansion of the promotion and application of small wind turbines, small wind turbines have gradually shifted from traditional agricultural, animal husbandry, and fishery applications to industrial production and residential life. However, the traditional low-power wind turbine airfoils are increasingly unsuitable for the current pursuit of high efficiency, energy saving and low noise. Small-power wind turbines have special characteristics such as short blades and low working Reynolds coefficients. Therefore, the influence of air viscosity on the blades of wind turbines has become a more important factor. Currently commonly used airfoils, such as: S809 airfoil, S822 airfoil, S823 airfoil, FFA-W1 airfoil, F...

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Problems solved by technology

At this time, the lift coefficient of the blade will drop sharply, the drag coefficient will increase sharply, and the efficiency of the wind turbine will be greatly reduced. It is difficult to meet the design requirements of a low-power generator. normal work

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