Mathematical Analysis of the Effect of Rotor Geometry on Cup Anemometer Response

Figure 3

Aerodynamic torque, 𝑀_𝐴, measured on 4-cup [27] (a) and 3-cup [13] (c) anemometers as a function of the ratio between the cup center velocity and the wind speed, Ω (Ω=𝜔𝑅_𝑟𝑐/𝑉). The nondimensional torque, 𝑚_𝐴, calculated for each curve, has also been included ((b) and (d)), together with the results from the classical theoretical model fitted to the curves; see expression (12).

(a)

(b)

(c)

(d)