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

Table 3

Parameters 𝑘_𝐷 and 𝛿 from the fittings of the proposed analytical model (with 𝜀=𝐶_𝑚𝑓=0, see expression (24)), to the testing results (see Figure 6). The table also includes the slope, d𝐾_𝑆/d𝑟_𝑟, the offset, 𝐾_𝑆0, and determination coefficient 𝑅² of the linear fittings for each case.

𝑅𝑟𝑐 [mm]	𝑘𝐷	𝛿	𝐾𝑆0  (=𝐾𝐴)	d𝐾𝑆/d𝑟𝑟  (=𝐾𝑐 )	𝑅^2
Climatronics 100075
40	0.6450	−1.7618	4.4353	−1.4874	0.9961
60	0.6505	−1.6958	4.5983	−1.5287	0.9747
80	0.6481	−1.5494	4.5779	−1.3297	0.9758
100	0.6372	−1.1801	4.4256	−0.8035	0.6975
120	0.6343	−0.9889	4.3904	−0.5810	0.6002
Ornytion 107A
40	0.6544	−1.7731	4.5936	−1.5784	0.9635
60	0.6570	−1.7327	4.7082	−1.6406	0.9972
80	0.6511	−1.5238	4.6200	−1.2895	0.9521
100	0.6418	−1.2409	4.4985	−0.9116	0.8076
120	0.6391	−1.0947	4.4661	−0.7407	0.9999