Skip to main content

Table 1 Comparison of change in computed sound power level, LwA for three and two blade rotors of a 2 MW wind turbine rotor blades at U10 = 10 m/s using BPM, Grosveld and Lowson methods

From: Influence of rotor solidity on trailing edge noise from wind turbine blades

  Frequency (Hz)
63 100 200 400 800 1000 2000 4000 5000 8000
BPM  
SPL [dBA]3,blade 61.3 73.0 88.6 97.0 94.9 94.3 89.7 82.4 79.4 72.0
SPL [dBA]2,blade 56.3 68.0 83.6 92.0 89.9 89.3 84.6 77.3 74.3 67.0
Δ dBA 5.0 5.0 4.9 5.0 5.0 5.0 5.1 5.1 5.1 5.1
Grosveld  
SPL [dBA]3,blade 77.2 84.4 90.2 91.6 89.2 87.8 81.7 74.0 71.0 64.3
SPL [dBA]2,blade 72.9 79.4 85.0 86.4 84.1 82.6 76.6 68.9 65.9 59.2
Δ dBA 4.2 4.9 5.3 5.2 5.1 5.1 5.1 5.1 5.1 5.1
Lowson  
SPL [dBA]3,blade 83.2 90.3 95.1 94.5 89.8 87.6 79.3 69.6 66.0 57.9
SPL [dBA]2,blade 81.8 88.7 93.0 91.9 87.0 84.8 76.6 66.8 63.2 55.2
Δ dBA 1.4 1.6 2.1 2.6 2.7 2.8 2.8 2.8 2.8 2.8
\