Acoustic liner with bypass cooling
AssigneeUnited Technologies Corporation
InventorsWilliam Proscia, Christopher D. Jones
Life of this patent
Estimating the term…
Abstract
An acoustic liner 20 includes a remote panel 26, a proximate panel 28 transversely spaced from the remote panel and a resonator chamber 34b residing between the panels. Perforations 38 penetrate the proximate panel in registration with the resonator chamber 34b. A neck 56 with an inlet 58 recessed from the proximate panel establishes communication between the chamber and a fluid stream G flowing past the proximate panel. A bypass coolant passage 66 guides coolant through the perforations without guiding it through the resonator chamber.
Claims21
A coolable acoustic liner for attenuating noise in a substantially longitudinally flowing fluid stream, comprising:
- a remote panel;
- a proximate panel transversely spaced from the remote panel;
- a resonator chamber residing between the remote and proximate panels, the resonator chamber having a neck with an inlet, the inlet being recessed from the proximate panel;
- perforations penetrating through the proximate panel, the perforations including a plurality of longitudinally spaced perforations in registration with the resonator chamber;
- and
- a bypass cooling system for guiding coolant through the plurality of longitudinally spaced perforations without guiding coolant through the resonator chamber.
A coolable acoustic liner for attenuating noise in a substantially longitudinally flowing fluid stream, comprising:
- a remote panel;
- a proximate panel transversely spaced from the remote panel;
- a resonator chamber residing between the remote and proximate panels, the resonator chamber having a neck with an inlet, the inlet being recessed from the proximate panel;
- perforations penetrating through the proximate panel in registration with the resonator chamber;
- and
- a bypass cooling system for guiding coolant through the perforations without guiding coolant through the resonator chamber, wherein the bypass cooling system includes a bypass coolant passage defined in part by a passage wall and a cooperating partition, a coolant intake comprising an opening in the remote panel for admitting coolant to the bypass cooling passage, and a coolant outlet for discharging coolant into a coolant plenum between the inlet and the proximate panel.
A coolable acoustic liner for attenuating noise in a substantially longitudinally flowing fluid stream, comprising:
- a remote panel;
- a proximate panel transversely spaced from the remote panel;
- a resonator chamber residing between the remote and proximate panels, the resonator chamber having a neck with an inlet, the inlet being recessed from the proximate panel;
- perforations penetrating through the proximate panel in registration with the resonator chamber;
- and
- a bypass cooling system for guiding coolant through the perforations without guiding coolant through the resonator chamber, and wherein the remote panel includes coolant admission holes for admitting coolant into higher frequency resonator chambers.
A coolable acoustic liner for attenuating noise in a substantially longitudinally flowing fluid stream, comprising:
- a remote panel;
- a proximate panel transversely spaced from the remote panel;
- a resonator chamber residing between the remote and proximate panels, the resonator chamber having a neck with an inlet, the inlet being recessed from the proximate panel;
- perforations penetrating through the proximate panel in registration with the resonator chamber;
- and
- a bypass cooling system for guiding coolant through the perforations without guiding coolant through the resonator chamber, and wherein the remote panel includes auxiliary coolant admission holes for admitting auxiliary coolant into lower frequency resonator chambers.
Dependencies are inferred from the claim text.