Acoustically absorptive liners for passive control of unwanted acoustic modes in rotating detonation combustors
AssigneeHysonic Technologies, LLC
InventorsZachary Rauch, Carlo Scalo
Life of this patent
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Abstract
Rotating Detonation Combustors (RDCs)—or Rotating Detonation Engines (RDEs)—are special propulsion devices that generate thrust by burning a fuel-oxidizer mixture via a rotating detonation wave, rather than a traditional flame. RDCs may exhibit unwanted secondary acoustic disturbances that negatively affect their detonative operation. Suppressing such unwanted/secondary acoustic modes associated with the main detonation wave may be achieved by an acoustically absorptive lining mountable in the internal walls of a RDC.
Claims27
An acoustically absorptive liner device for a rotating detonation combustor, the acoustically absorptive liner device comprising:
- a cylindrically shaped body, the cylindrically shaped body comprising an outer surface, an inner surface, a first open end, and a second open end;
- and
- a plurality of Helmholtz resonators formed in said cylindrically shaped body, wherein each said Helmholtz resonator comprises a cylindrically shaped cavity open to said outer surface and having a rim coincident with said outer surface and at least one cylindrically shaped pore open at a first end to said cylindrically shaped cavity and open at a second end to said inner surface, thereby forming an acoustic conduit between said inner surface and said outer surface.
A rotating detonation combustor, the rotating detonation combustor comprising:
- an acoustically absorptive liner device comprising a cylindrically shaped body, the cylindrically shaped body comprising an outer surface, an inner surface, a first open end, and a second open end, and at least one Helmholtz resonator formed in said cylindrically shaped body, wherein each said at least one Helmholtz resonator comprises a cylindrically shaped cavity open to said outer surface and having a rim coincident with said outer surface, and at least one cylindrically shaped pore open at a first end to said cylindrically shaped cavity and open at a second end to said inner surface, thereby forming an acoustic conduit between said inner surface and said outer surface.
Dependencies are inferred from the claim text.