Please don’t copy and paste so much. The key is whether the pasted content is relevant. LZ is asking about wind turbine blades, not the impeller blades of compressors you mentioned.
The blades of the wind turbine are determined based on factors such as the design rated power of the wind turbine, the rated wind speed of the wind turbine, and the density of the local wind.
If the impeller diameter of a wind turbine is D
Then its swept area S = ∏D^2/4
The area passed through per unit time The mass of the wind, that is, the wind flow rate is Q = ρSV = ρ∏VD^2/4 V is the wind speed
According to the kinetic energy theorem, there is wind power density
P1 = 0.5mV^2 = (ρ∏VD^2/4)V^2/2 = ρ∏D^2*V^2/8
Then there is a wind power coefficient Cp, which is the wind power coefficient Cp obtained by the wind wheel from Ek The percentage of wind energy that can be captured accounts for the total wind energy
Therefore, the theoretical power generation of the wind turbine
P = Cp*P1
Before designing the wind turbine, it is necessary to The design wind speed V and air density ρ can be obtained by long-term observation of the wind speed and air density in the wind field. The design Cp is related to the tip speed ratio, and the optimal value is generally selected. Therefore, the required theoretical diameter of the impeller can be back calculated.