| 摘要 |
A wind turbine blade 100 comprising a shell 108 defining a hollow interior, where a reinforcing spar structure extends longitudinally and comprises a spar cap 106 connected to or integrated with the shell. Radar-absorbing material is incorporated within the blade, where the radar-absorbing material includes an impedance layer 118 located near an exterior surface of the shell and a radar-reflecting surface inboard of and spaced apart from the impedance layer. The impedance layer and the radar-reflecting surface together form a radar absorber. In spar cap regions of the blade, the radar-reflecting surface is formed by the spar cap. A dielectric component 120 in the form of a glass-fibre pultrusion may be provided between the spar cap and the impedance layer. A method of making a wind turbine blade is also claimed. |
