Читать книгу Wind Energy Handbook - Michael Barton Graham - Страница 97

The thrust force on the rotor is directly applied to the tower on which the rotor is supported and so considerably influences the structural design of the tower.

Generally, the thrust on the rotor increases with increasing solidity, as shown in Figure 3.54. These results are computed using Eq. (3.48) without the additional contribution from the rotational wake pressure term Δp_d2 [see Eq. (3.22) and the discussion following Eq. (3.48). Including this term increases the value of C_T by the order of 1% when λ = 8 (specifically 1.39% for λ = 8, a = 1/3 and blade root at r/R = 0.135).

Figure 3.53 The effect of solidity on torque.

Figure 3.54 The effect of solidity on thrust.