Guide vane assembly
First Claim
1. A guide vane assembly comprising a casing, a plurality of circumferentially spaced radially extending guide vanes, the guide vanes being secured at their radially outer ends to the casing, a plurality of panels being secured to the casing, each panel being arranged between two adjacent guide vanes to define the flow path between the guide vanes, at least one panel comprising a perforated skin and an acoustic treatment structure, the perforated skin defining the flow path between the guide vanes and with each panel being located circumferentially between two adjacent guide vanes.
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Accused Products
Abstract
A fan outlet guide vane assembly (36) for a turbofan gas turbine engine (10) comprises a fan casing (32) and a plurality of circumferentially spaced radially extending fan outlet guide vanes (34). The fan outlet guide vanes (34) are secured at their radially outer ends to the fan casing (32). A plurality of panels (40) are secured to the fan casing (32). Each panel (40) is arranged between two adjacent fan outlet guide vanes (34) to define the flow path between the fan outlet guide vanes (34). Each panel (40) comprises a perforated skin (42) and a honeycomb structure (44) to form an acoustic treatment structure. The perforated skin (42) defines the flow path between the fan outlet guide vanes (34). The pressure equalization across the panels (40) minimises the possibility of the panels (40) being removed.
30 Citations
14 Claims
- 1. A guide vane assembly comprising a casing, a plurality of circumferentially spaced radially extending guide vanes, the guide vanes being secured at their radially outer ends to the casing, a plurality of panels being secured to the casing, each panel being arranged between two adjacent guide vanes to define the flow path between the guide vanes, at least one panel comprising a perforated skin and an acoustic treatment structure, the perforated skin defining the flow path between the guide vanes and with each panel being located circumferentially between two adjacent guide vanes.
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14. A guide vane assembly comprising a casing, a plurality of circumferentially spaced radially extending guide vanes, the guide vanes being secured at their radially outer ends to the casing, a plurality of panels being secured to the casing, each panel being arranged between two adjacent guide vanes to define the flow path between the guide vanes, at least one panel comprising a perforated skin and an acoustic treatment structure, the perforated skin defining the flow path between the guide vanes wherein a flexible seal is arranged between the circumferential edges of the at least one panel and the two adjacent fan outlet guide vanes to seal the gaps between the circumferential edges of the at least one panel and the two adjacent fan outlet guide vanes.
Specification