Acoustic liner with bypass cooling

摘要

An acoustic liner (20) includes a remote panel (26), a proximate panel (28) transversely spaced from the remote panel (26) and a resonator chamber (34b) residing between the panels (22,26). Perforations (38) penetrate the proximate panel (22) in registration with the resonator chamber (34b). A neck (56) with an inlet (58) recessed from the proximate panel (22) establishes communication between the chamber (34b) and a fluid stream (G) flowing past the proximate panel (22). A bypass coolant passage (66) guides coolant through the perforations (38) without guiding it through the resonator chamber (34b).