Augmentor liner

An augmentor liner operable to accommodate acoustic pressure waves that cause screech during operation, the acoustic pressure waves having a circumferential mode order number, the liner comprising:

• an annulus disposed between a first wall and a second wall, the annulus extending along the axial centerline, wherein the first wall is disposed radially inside of the second wall;
• a plurality of bands, each circumferentially extending within the annulus and axially spaced apart from one another, wherein the bands are attached to the first wall and to the second wall and are operable to accommodate relative position change between the first wall and second wall;
• and
• a plurality of baffles extending lengthwise between adjacent bands and heightwise between the first wall and the second wall, wherein a number of baffles are circumferentially spaced apart by substantially equal distances from one another, wherein the number of baffles is equal to two or eight, or some number therebetween, times the circumferential mode order number.

An augmentor liner having an axial centerline and a circumference, comprising:

• an annulus disposed between a first wall and a second wall, the annulus extending along the axial centerline, wherein the first wall is disposed radially inside of the second wall;
• a plurality of bands, each circumferentially extending within the annulus and axially spaced apart from one another, wherein the bands are attached to the first wall and to the second wall;
• and
• a plurality of baffles each having a thickness, the baffles extending lengthwise between adjacent bands and heightwise between the first wall and the second wall, wherein substantially all of the baffles include one or more passages having an extended length passage operable to damp acoustic pressure waves.