Noise mitigating compressor
AssigneeFord Global Technologies, LLC
InventorsLiangjun Hu, Ben Zhao, Jianwen James Yi
Life of this patent
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Abstract
Methods and systems are provided for a noise mitigating device for a turbocharger compressor. In one example, the noise mitigating device includes a set of perforated rings arranged in a recirculation passage of a compressor casing treatment. The rings of the set of perforated rings may be oriented so that apertures of one ring are offset from apertures of one or more adjacent rings, forcing air to flow through the apertures via a non-linear path while deflecting at least a portion of sounds waves generated in the compressor.
Claims20
A noise mitigating device comprising:
- a plurality of rings cascaded along a recirculation passage arranged outside of an intake passage within a compressor housing, wherein each ring of the plurality of rings includes a respective plurality of perforations, with each perforation of the respective plurality of perforations spaced evenly apart from each adjacent perforation of the respective plurality of perforations around a ring circumference, and wherein each perforation of the respective plurality of perforations of each ring of the plurality of rings is aligned with a respective solid surface of each adjacent ring of the plurality of rings in a direction of a central axis of the compressor housing.
A system comprising;
- a compressor arranged in a compressor housing;
- an intake passage shaped to flow air to an impeller of the compressor and to a recirculation passage arranged radially outside of the intake passage in the compressor housing;
- and
- at least two perforated rings arranged between an inlet and an outlet of the recirculation passage, where each perforated ring of the at least two perforated rings includes a plurality of apertures, with each aperture of each perforated ring spaced apart from each adjacent aperture around a circumference of each perforated ring, and where each aperture of each perforated ring is aligned with solid surfaces of each adjacent perforated ring in an axial direction of the compressor.
A compressor comprising;
- a casing treatment surrounding an intake passage of the compressor, the casing treatment shaped to flow air around and outside of the intake passage;
- and
- a set of perforated rings, arranged in the casing treatment in a path of air flow and cascaded in a direction of air flow outside of the intake passage, where each ring of the set of perforated rings includes a plurality of perforations spaced evenly around a circumference of a body of each ring, with the plurality of perforations of each ring of the set of perforated rings being misaligned with the plurality of perforations of each adjacent ring of the set of perforated rings to force the air flow through all perforations of the plurality of perforations to a tortuous path.
Dependencies are inferred from the claim text.