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公开(公告)号：US20180016987A1
公开(公告)日：2018-01-18
申请号：US15553207
申请日：2015-03-10
发明人： Graham Frank Howarth , Andrew Michael Roach , Steven Thomas Davies , Richard David Cedar , Michael Moses Martinez , Timothy Richard DePuy
IPC分类号： F02C7/24
CPC分类号： F02C7/24 , F02C7/045 , F02K1/827 , F05D2220/323 , F05D2250/11 , F05D2250/14 , F05D2250/283 , F05D2260/963 , G10K11/172 , Y02T50/672
摘要： An acoustic liner for a turbine engine, the acoustic liner includes a support layer that includes a set of partitioned cavities with open faces, a facing sheet operably coupled to the support layer such that the facing sheet overlies and closes the open faces, a set of perforations located in the facing sheet and in fluid communication with a corresponding one of the cavities to form a set of acoustic resonators, and at least a subset of the perforations have an axially-oriented, relative to the axial flow path, inlet.
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公开(公告)号：US10563578B2
公开(公告)日：2020-02-18
申请号：US15550800
申请日：2015-02-18
发明人： Andrew Michael Roach , Richard David Cedar , Steven Thomas Davies , Timothy Richard Depuy , Graham Frank Howarth , Michael Moses Martinez
IPC分类号： F02C7/045 , F02K1/82 , G10K11/168 , G10K11/172 , B05D5/08 , B64D33/02 , B32B3/12 , B32B3/24 , B32B3/26 , F02C7/24 , F02K1/44 , G10K11/16
摘要： An acoustic liner for a turbine engine, the acoustic liner includes a support layer that includes a set of partitioned cavities with open faces, a perforated sheet that includes a set of perforations with corresponding inlets, the perforated sheet supported by the support layer such that perforations are in overlying relationship with the open faces to form paired perforations and cavities that define acoustic resonator cells, and a coating applied to the perforated sheet.
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公开(公告)号：US11047304B2
公开(公告)日：2021-06-29
申请号：US16058171
申请日：2018-08-08
发明人： Wendy Wenling Lin , Shanmugam Murugappan , Robert William Davidoff , Graham Frank Howarth , Andrew Michael Roach
IPC分类号： F02C7/045 , B33Y80/00 , B33Y10/00 , B29C64/10 , B28B1/00 , B23P15/00 , B22F10/10 , B29L31/00
摘要： An acoustic core has a plurality of cell walls formed of an additive-manufacturing material and a resonant space defined by the plurality of cell walls. At least some of the resonant cells have a multitude of sound-attenuating protuberances formed of the additive-manufacturing material of the cell walls protruding into the resonant space with a random or semi-random orientation and/or size. The sound-attenuating protuberances may be formed by orienting an additive-manufacturing tool with respect to a toolpath to form a contour of a workpart, in which the toolpath includes a plurality of overlapping toolpath passes configured so as to intentionally introduce an amount of additive-manufacturing material to the workpart that exceeds a domain occupied by the contour. As the amount of additive-manufacturing material intentionally introduced exceeds the domain occupied by the contour, a portion of the additive-manufacturing material may incidentally form the plurality of sound-attenuating protuberances.
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公开(公告)号：US20200309028A1
公开(公告)日：2020-10-01
申请号：US16370124
申请日：2019-03-29
发明人： Shanmugam Murugappan , Michael Moses Martinez , Egbert Geertsema , Rudramuni Kariveerappa Majjigi , Richard David Cedar , Wendy Wenling Lin , Robert William Davidoff , David Patrick Calder , Graham Frank Howarth
摘要： An acoustic liner may include an acoustic core having an array of resonant cells, and an acoustic screen disposed across the array of resonant cells. The resonant cells include a plurality of cell walls and a resonant space defined by the plurality of cell walls. The acoustic core may include a folded acoustic core. Additionally, or in the alternative, at least some of the resonant cells may include an oblique polyhedral cellular structure and/or a multitude of sound-attenuating protuberances. The acoustic screen may include a reticulate membrane and a support lattice.
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公开(公告)号：US11885264B2
公开(公告)日：2024-01-30
申请号：US17333085
申请日：2021-05-28
发明人： Wendy Wenling Lin , Shanmugam Murugappan , Robert William Davidoff , Graham Frank Howarth , Andrew Michael Roach
IPC分类号： F02C7/045 , F02K1/82 , B64D33/02 , G10K11/172 , B33Y80/00 , B33Y10/00 , B29C64/10 , B28B1/00 , B23P15/00 , B22F10/14 , B22F10/18 , B22F10/25 , B22F10/28 , B29L31/00 , B22F10/12
CPC分类号： F02C7/045 , B22F10/14 , B22F10/18 , B22F10/25 , B22F10/28 , B23P15/008 , B28B1/001 , B29C64/10 , B33Y10/00 , B33Y80/00 , B22F10/12 , B29K2995/0002 , B29L2031/7504 , F05D2220/323 , F05D2230/31 , F05D2230/50 , F05D2240/14 , F05D2260/96 , Y10T29/49323
摘要： An acoustic core has a plurality of cell walls formed of an additive-manufacturing material and a resonant space defined by the plurality of cell walls. At least some of the resonant cells have sound-attenuating protuberances formed of an excess amount of the additive-manufacturing material having been intentionally introduced to the cell walls and protruding into the resonant space with a semi-random orientation and/or size.
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公开(公告)号：US11434819B2
公开(公告)日：2022-09-06
申请号：US16370124
申请日：2019-03-29
发明人： Shanmugam Murugappan , Michael Moses Martinez , Egbert Geertsema , Rudramuni Kariveerappa Majjigi , Richard David Cedar , Wendy Wenling Lin , Robert William Davidoff , David Patrick Calder , Graham Frank Howarth
摘要： An acoustic liner may include an acoustic core having an array of resonant cells, and an acoustic screen disposed across the array of resonant cells. The resonant cells include a plurality of cell walls and a resonant space defined by the plurality of cell walls. The acoustic core may include a folded acoustic core. Additionally, or in the alternative, at least some of the resonant cells may include an oblique polyhedral cellular structure and/or a multitude of sound-attenuating protuberances. The acoustic screen may include a reticulate membrane and a support lattice.
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公开(公告)号：US20210324794A1
公开(公告)日：2021-10-21
申请号：US17333085
申请日：2021-05-28
发明人： Wendy Wenling Lin , Shanmugam Murugappan , Robert William Davidoff , Graham Frank Howarth , Andrew Michael Roach
摘要： An acoustic core has a plurality of cell walls formed of an additive-manufacturing material and a resonant space defined by the plurality of cell walls. At least some of the resonant cells have a multitude of sound-attenuating protuberances formed of the additive-manufacturing material of the cell walls protruding into the resonant space with a random or semi-random orientation and/or size. The sound-attenuating protuberances may be formed by orienting an additive-manufacturing tool with respect to a toolpath to form a contour of a workpart, in which the toolpath includes a plurality of overlapping toolpath passes configured so as to intentionally introduce an amount of additive-manufacturing material to the workpart that exceeds a domain occupied by the contour. As the amount of additive-manufacturing material intentionally introduced exceeds the domain occupied by the contour, a portion of the additive-manufacturing material may incidentally form the plurality of sound-attenuating protuberances.
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公开(公告)号：US20200049068A1
公开(公告)日：2020-02-13
申请号：US16058171
申请日：2018-08-08
发明人： Wendy Wenling Lin , Shanmugam Murugappan , Robert William Davidoff , Graham Frank Howarth , Andrew Michael Roach
摘要： An acoustic core has a plurality of cell walls formed of an additive-manufacturing material and a resonant space defined by the plurality of cell walls. At least some of the resonant cells have a multitude of sound-attenuating protuberances formed of the additive-manufacturing material of the cell walls protruding into the resonant space with a random or semi-random orientation and/or size. The sound-attenuating protuberances may be formed by orienting an additive-manufacturing tool with respect to a toolpath to form a contour of a workpart, in which the toolpath includes a plurality of overlapping toolpath passes configured so as to intentionally introduce an amount of additive-manufacturing material to the workpart that exceeds a domain occupied by the contour. As the amount of additive-manufacturing material intentionally introduced exceeds the domain occupied by the contour, a portion of the additive-manufacturing material may incidentally form the plurality of sound-attenuating protuberances.
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