초록 ▼

An annular acoustic liner for gas turbine engine ducts comprising Helmholtz resonator chambers wherein the resonator\s turnable neck length and chamber depth lie on a surface which is concentric to the liner centerline. In another embodiment of the invention the liner is generally rectangular and th

An annular acoustic liner for gas turbine engine ducts comprising Helmholtz resonator chambers wherein the resonator\s turnable neck length and chamber depth lie on a surface which is concentric to the liner centerline. In another embodiment of the invention the liner is generally rectangular and the resonator\s turnable neck length and chamber depth lie on a surface which is parallel to the duct flow. A more particular embodiment of the invention the duct is an afterburner duct which may have a rectangular or circular cross section.

대표청구항 ▼

An acoustic liner for a gas turbine engine duct comprising: an inner annular facing; an outer annular wall spaced radially apart from said inner annular facing; a plurality of annular Helmholtz resonator-type chambers having predetermined depths formed between said inner annular facing and said oute

An acoustic liner for a gas turbine engine duct comprising: an inner annular facing; an outer annular wall spaced radially apart from said inner annular facing; a plurality of annular Helmholtz resonator-type chambers having predetermined depths formed between said inner annular facing and said outer annular wall; said chambers including necks having predetermined lengths wherein said neck lengths and said chamber depths run in a direction parallel to the gas flow; an annular support member extending radially inward from said outer annular wall and forming at least a portion of axially spaced end walls of said chambers; said annular support member including an annular flange at a radially inner end of said support member and concentric with said annular wall having an axial length with respect to the engine that corresponds to said neck lengths of said chambers; and at least one circumferentially disposed wiggle strip mounted between said concentric annular flange and said inner annular facing forming at least a portion of said necks.