Rolls-royce Corporation

Richard Evans

Thomas Gerard Mulcaire

Michael T Holdsworth

A fan outlet guide vane assembly ( ) for a turbofan gas turbine engine ( ) comprises a fan casing ( ) and a plurality of circumferentially spaced radially extending fan outlet guide vanes ( ). The fan outlet guide vanes ( ) are secured at their radially outer ends to the fan casing ( ). A plurality of panels ( ) are secured to the fan casing ( ). Each panel ( ) is arranged between two adjacent fan outlet guide vanes ( ) to define the flow path between the fan outlet guide vanes ( ). Each panel ( ) comprises a perforated skin ( ) and a honeycomb structure ( ) to form an acoustic treatment structure. The perforated skin ( ) defines the flow path between the fan outlet guide vanes ( ). The pressure equalization across the panels ( ) minimises the possibility of the panels ( ) being removed.

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Derby, United Kingdom

Richard Evans