Abstract: A stator-vane structure that can suppress pressure loss caused by a gap or a level difference between liners, while forming an air channel with stator vanes made of a composite material and the liners in a turbofan engine, and the turbofan engine employing this stator-vane structure are provided. Inner liners are made to butt against each other so as to clamp therebetween a vane base section of a fan exit guide vane (stator vane) made of a composite material, outer liners are made to butt against each other so as to clamp therebetween a vane tip section of the fan exit guide vane, respectively, and division lines that are formed between these liners on a leading-edge side are made to be along a streamline direction.

Abstract: A coupling support member including a pair of divided pieces is placed in a coupling part between a vane base end portion of a guide vane and an attachment flange, and the pair of divided pieces are joined to the vane base end portion from both the sides in the vane thickness direction. Linear protrusions are respectively formed on both the sides of the vane base end portion. Grooves engaged with the linear protrusions formed in the vane base end portion are respectively formed in the pair of divided pieces of the coupling support member. Side edges that are located on the vane center side of the pair of divided pieces and extend along the chord direction are formed so as to protrude toward the vane center, and the respective tip ends of the side edges are chamfered.

Abstract: A stator-vane structure that can suppress pressure loss caused by a gap or a level difference between liners, while forming an air channel with stator vanes made of a composite material and the liners in a turbofan engine, and the turbofan engine employing this stator-vane structure are provided. Inner liners are made to butt against each other so as to clamp therebetween a vane base section of a fan exit guide vane (stator vane) made of a composite material, outer liners are made to butt against each other so as to clamp therebetween a vane tip section of the fan exit guide vane, respectively, and division lines that are formed between these liners on a leading-edge side are made to be along a streamline direction.

Abstract: A coupling support member including a pair of divided pieces is placed in a coupling part between a vane base end portion of a guide vane and an attachment flange, and the pair of divided pieces are joined to the vane base end portion from both the sides in the vane thickness direction. Linear protrusions are respectively formed on both the sides of the vane base end portion. Grooves engaged with the linear protrusions formed in the vane base end portion are respectively formed in the pair of divided pieces of the coupling support member. Side edges that are located on the vane center side of the pair of divided pieces and extend along the chord direction are formed so as to protrude toward the vane center, and the respective tip ends of the side edges are chamfered.