Feather power

日期:2019-03-06 10:07:02 作者:铁船伛 阅读:

By Barry Fox Rolls-Royce reckons the aerospace industry has so far overlooked a simple and cheap way to boost the power of jet engines (GB 2355288). The ideal turbine blade is shaped like an aerofoil, with a rounded leading edge and a very thin trailing edge. In practice, to stop the heat of the engine eroding the steel blades, the trailing edge also has to be slightly rounded. But this upsets the gas flow, so Rolls-Royce has tipped the trailing edge with silicon carbide fibres that trail like birds’ feathers. This stabilises the gas flow,