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公开(公告)号：WO0055036A3
公开(公告)日：2001-02-22
申请号：PCT/US0004792
申请日：2000-02-25
Applicant: UNITED TECHNOLOGIES CORP , MCCORMICK DUANE C , GYSLING DANIEL L
Inventor： MCCORMICK DUANE C , GYSLING DANIEL L
IPC: B64C21/02 , B64C23/00 , F01D25/24 , F01D25/30 , F02C7/00 , F02C7/04 , F04D29/42 , F04D29/52 , F04D29/68 , F15D1/12
CPC classification number: F15D1/12 , B64C23/00 , B64C2230/02 , B64C2230/04 , B64C2230/16 , B64C2230/28 , Y02T50/166
Abstract: The nozzle of an acoustic jet directs high momentum flux gas particles essentially tangentially into the boundary layer of the flow in a diffuser, an engine air inlet, a jet engine gas flow path or on the suction surface of an airfoil, the gas particles in the chamber of the tangential acoustic jet being replenished with approaching low momentum flux particles drawn from the gas flow in a direction normal to the surface, thereby to provide a net time-averaged flow of increased momentum flux particles to defer the onset of boundary layer separation and/or reduce the thickness of the boundary layer. The acoustic jet is driven by a gas pressure oscillation generator which may be a loudspeaker, a resonant solenoid piston, a cranked piston, or the like.
Abstract translation: 声学喷嘴的喷嘴将高动量通量气体颗粒基本切向地引导到扩散器，发动机空气入口，喷气发动机气体流动路径中或在翼型的吸力表面上的流动的边界层中，气体颗粒在 切向声射流的腔室被补充有接近从垂直于表面的方向从气流中吸取的低动量通量粒子，从而提供增加的动量通量粒子的净时间平均流，推迟边界层分离的开始， /或减小边界层的厚度。 声射流由气体压力振荡发生器驱动，气体振荡发生器可以是扬声器，谐振电磁阀活塞，曲柄活塞等。
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公开(公告)号：ES2149595T3
公开(公告)日：2000-11-01
申请号：ES97924712
申请日：1997-05-14
Applicant: UNITED TECHNOLOGIES CORP
Inventor： JACOBSON CLAS A , MCCORMICK DUANE C
IPC: G10K11/178
Abstract: An active noise (or vibration) control system having an actuator 24 which provides an acoustic anti-noise signal in response to an drive signal (U), an error sensor 16 which senses the acoustic anti-noise signal from the actuator, senses disturbance noise (d), and provides an error signal (e) indicative of a combination thereof, and a controller 20, responsive to the error signal (e), which provides the drive signal (U) to the actuator 24, is provided with controller compensation 78 having energy states 112 and having non-linear reset logic 130 which temporarily resets the energy states 112 in the filter 78 to zero when the error signal crosses zero, thereby improving the bandwidth of the active noise control system.
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公开(公告)号：CA2361824A1
公开(公告)日：2000-09-21
申请号：CA2361824
申请日：2000-02-25
Applicant: UNITED TECHNOLOGIES CORP
Inventor： MCCORMICK DUANE C , GYSLING DANIEL L
IPC: B64C21/02 , B64C23/00 , F01D25/24 , F01D25/30 , F02C7/00 , F02C7/04 , F04D29/42 , F04D29/52 , F04D29/68 , F15D1/12
Abstract: The nozzle of an acoustic jet directs high momentum flux gas particles essentially tangentially into the boundary layer of the flow in a diffuser, an engine air inlet, a jet engine gas flow path or on the suction surface of an airfoil, the gas particles in the chamber of the tangential acoustic jet bei ng replenished with approaching low momentum flux particles drawn from the gas flow in a direction normal to the surface, thereby to provide a net time- averaged flow of increased momentum flux particles to defer the onset of boundary layer separation and/or reduce the thickness of the boundary layer. The acoustic jet is driven by a gas pressure oscillation generator which may be a loudspeaker, a resonant solenoid piston, a cranked piston, or the like.
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公开(公告)号：CA2372295A1
公开(公告)日：2000-08-31
申请号：CA2372295
申请日：2000-02-25
Applicant: UNITED TECHNOLOGIES CORP
Inventor： MCCORMICK DUANE C , LORD WESLEY K
Abstract: Existing pressure oscillations created by axial or centrifugal fans in a diverging shroud are utilized to power a passive, acoustic jet, the nozzle o f which directs high momentum flux gas particles essentially tangentially into the boundary layer of the flow in a diffuser, or a duct, the fluid particles in the resonant chamber of the passive acoustic jet being replenished with l ow momentum flux particles drawn from the fluid flow in a direction normal to t he surface, thereby to provide a net time averaged flow of increased momentum flux particles to defer, even eliminate, the onset of boundary layer separation in the diffuser or duct. The passive acoustic jet is used in the vicinity of fan blade tips to alleviate undesirable flow effects in the tip region, such as leakage.
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公开(公告)号：AU4448900A
公开(公告)日：2000-09-14
申请号：AU4448900
申请日：2000-02-25
Applicant: UNITED TECHNOLOGIES CORP
Inventor： MCCORMICK DUANE C , LORD WESLEY K
Abstract: Existing pressure oscillations created by axial or centrifugal fans in a diverging shroud are utilized to power a passive, acoustic jet, the nozzle of which directs high momentum flux gas particles essentially tangentially into the boundary layer of the flow in a diffuser, or a duct, the fluid particles in the resonant chamber of the passive acoustic jet being replenished with low momentum flux particles drawn from the fluid flow in a direction normal to the surface, thereby to provide a net time averaged flow of increased momentum flux particles to defer, even eliminate, the onset of boundary layer separation in the diffuser or duct. The passive acoustic jet is used in the vicinity of fan blade tips to alleviate undesirable flow effects in the tip region, such as leakage.
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Patent Agency Ranking
公开(公告)号：CA2372295C
公开(公告)日：2008-07-08
申请号：CA2372295
申请日：2000-02-25
Applicant: UNITED TECHNOLOGIES CORP
Inventor： LORD WESLEY K , MCCORMICK DUANE C
Abstract: Existing pressure oscillations created by axial or centrifugal fans in a diverging shroud are utilized to power a passive, acoustic jet, the nozzle of which directs high momentum flux gas particles essentially tangentially into the boundary layer of the flow in a diffuser, or a duct, the fluid particles in the resonant chamber of the passive acoustic jet being replenished with low momentum flux particles drawn from the fluid flow in a direction normal to the surface, thereby to provide a net time averaged flow of increased momentum flux particles to defer, even eliminate, the onset of boundary layer separation in the diffuser or duct. The passive acoustic jet is used in the vicinity of fan blade tips to alleviate undesirable flow effects in the tip region, such as leakage.
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公开(公告)号：HK1021060A1
公开(公告)日：2000-05-26
申请号：HK99106199
申请日：1999-12-30
Applicant: UNITED TECHNOLOGIES CORP
Inventor： JACOBSON CLAS A , MCCORMICK DUANE C
IPC: G10K11/178 , G10K
Abstract: An active noise (or vibration) control system having an actuator 24 which provides an acoustic anti-noise signal in response to an drive signal (U), an error sensor 16 which senses the acoustic anti-noise signal from the actuator, senses disturbance noise (d), and provides an error signal (e) indicative of a combination thereof, and a controller 20, responsive to the error signal (e), which provides the drive signal (U) to the actuator 24, is provided with controller compensation 78 having energy states 112 and having non-linear reset logic 130 which temporarily resets the energy states 112 in the filter 78 to zero when the error signal crosses zero, thereby improving the bandwidth of the active noise control system.
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公开(公告)号：AU712840B2
公开(公告)日：1999-11-18
申请号：AU3006397
申请日：1997-05-14
Applicant: UNITED TECHNOLOGIES CORP
Inventor： JACOBSON CLAS A , MCCORMICK DUANE C
IPC: G10K11/178
Abstract: An active noise (or vibration) control system having an actuator 24 which provides an acoustic anti-noise signal in response to an drive signal (U), an error sensor 16 which senses the acoustic anti-noise signal from the actuator, senses disturbance noise (d), and provides an error signal (e) indicative of a combination thereof, and a controller 20, responsive to the error signal (e), which provides the drive signal (U) to the actuator 24, is provided with controller compensation 78 having energy states 112 and having non-linear reset logic 130 which temporarily resets the energy states 112 in the filter 78 to zero when the error signal crosses zero, thereby improving the bandwidth of the active noise control system.
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公开(公告)号：DK0907948T3
公开(公告)日：2000-11-06
申请号：DK97924712
申请日：1997-05-14
Applicant: UNITED TECHNOLOGIES CORP
Inventor： JACOBSON CLAS A , MCCORMICK DUANE C
IPC: G10K11/178
Abstract: An active noise (or vibration) control system having an actuator 24 which provides an acoustic anti-noise signal in response to an drive signal (U), an error sensor 16 which senses the acoustic anti-noise signal from the actuator, senses disturbance noise (d), and provides an error signal (e) indicative of a combination thereof, and a controller 20, responsive to the error signal (e), which provides the drive signal (U) to the actuator 24, is provided with controller compensation 78 having energy states 112 and having non-linear reset logic 130 which temporarily resets the energy states 112 in the filter 78 to zero when the error signal crosses zero, thereby improving the bandwidth of the active noise control system.
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公开(公告)号：BR9710041A
公开(公告)日：1999-08-10
申请号：BR9710041
申请日：1997-05-14
Applicant: UNITED TECHNOLOGIES CORP
Inventor： JACOBSON CLAS A , MCCORMICK DUANE C
IPC: G10K11/178
Abstract: An active noise (or vibration) control system having an actuator 24 which provides an acoustic anti-noise signal in response to an drive signal (U), an error sensor 16 which senses the acoustic anti-noise signal from the actuator, senses disturbance noise (d), and provides an error signal (e) indicative of a combination thereof, and a controller 20, responsive to the error signal (e), which provides the drive signal (U) to the actuator 24, is provided with controller compensation 78 having energy states 112 and having non-linear reset logic 130 which temporarily resets the energy states 112 in the filter 78 to zero when the error signal crosses zero, thereby improving the bandwidth of the active noise control system.
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