公开(公告)号：US11187136B2

公开(公告)日：2021-11-30

申请号：US15846251

申请日：2017-12-19

申请人： U.S. Army Research Laboratory ATTN: RDRL-LOC-I

发明人： Michael V. Scanlon

IPC分类号： F01N1/08 ,  F01N1/12 ,  F01N13/18 ,  F01N1/02

摘要： A noise abatement system including at least one fluid circulation chamber to receive at least one flow of fluid; at least one vorticity-inducing component adjacent to the at least one fluid circulation chamber, the at least one vorticity-inducing component to redirect the at least one flow of fluid tangentially to an inside perimeter wall of the at least one fluid circulation chamber to create fluctuations in a flow and pressure of the fluid causing increased and variable vorticity within the at least one fluid circulation chamber; and at least one vorticity-interaction region in communication with the at least one vorticity-inducing component to attenuate acoustics caused by the at least one flow of fluid.

公开(公告)号：US20210172355A1

公开(公告)日：2021-06-10

申请号：US16893465

申请日：2020-06-05

申请人： U.S. Army Combat Capabilities Development Command, Army Research Labortary

发明人： Michael V. Scanlon, SR.

IPC分类号： F01N1/12 ,  G10K11/162

摘要： Apparatus for attenuating a sound level comprising an enclosure having an inlet and an outlet, where an exhaust flow director is positioned within the enclosure and fluidly coupled to the inlet and the outlet. The exhaust flow director comprises a plurality of overlapping vanes that directs the exhaust flow to attenuate the level of the sound produced by the exhaust.

公开(公告)号：US10947876B2

公开(公告)日：2021-03-16

申请号：US16530662

申请日：2019-08-02

申请人： Trustees of Boston University

发明人： Xin Zhang ,  Reza Ghaffarivardavagh ,  Stephan Anderson

IPC分类号： F01N1/06 ,  F01N1/12 ,  F01N1/08

摘要： A bilayer metamaterial silencer allows substantial fluid through the apparatus, while mitigating the propagation of sound through the apparatus, and while providing a form factor that is significantly more compact than previously-known devices. Moreover, illustrative embodiments allow a designer to specify one or both of the frequency or frequencies at which the apparatus mitigates sound propagation, and/or the bandwidth around the frequency or frequencies at which the apparatus mitigates sound propagation.

公开(公告)号：US10273862B2

公开(公告)日：2019-04-30

申请号：US15433657

申请日：2017-02-15

申请人： Roy R. Martinez

发明人： Roy R. Martinez

IPC分类号： F01N13/08 ,  F01N1/12 ,  F02B27/04

摘要： An improved engine exhaust extractor improves internal combustion engine performance and efficiency. The exhaust extractor includes coaxial inner and outer tubes separating a flow into an inner flow inside the inner tube and an outer flow between the tubes and merging near the exhaust extractor outlet. Helically oriented vanes extend radially from an outer face of the inner tube and reliefs are cut into the inner tube to allow gasses to flow to the outer flow. The inner tube is held in place by end pieces connecting the inner tube to the outer tube. The end pieces include fan blades with wing shaped cross-sections to increase the velocity of exhaust gasses flowing through the exhaust extractor. The fan-like supports and helically oriented vanes cause the outer flow to rotate about a central axis. The exhaust extractor is constructed from only six parts requiring only two welds.

公开(公告)号：US08833513B2

公开(公告)日：2014-09-16

申请号：US13823359

申请日：2011-09-07

申请人： Noboru Matsumoto

发明人： Noboru Matsumoto

IPC分类号： F01N13/08 ,  F01N13/02 ,  F01N1/12 ,  F01N13/00 ,  F01N1/02

CPC分类号： F01N13/08 ,  F01N1/003 ,  F01N1/08 ,  F01N1/12 ,  F01N13/02 ,  F01N2470/00 ,  F01N2470/02

摘要： An exhaust muffler with a tail pipe for suppressing ripples, increasing an engine output and improving fuel consumption efficiency is provided. A chamber is provided in the middle of an exhaust pipe for an internal combustion engine. A tail pipe connected to an end portion of an exhaust opening of the exhaust pipe is provided. A plurality of fins are disposed inside the tail pipe in a spiral shape that is gradually widened toward a discharging direction of the exhaust gas. The chamber includes a cover body and an internal exhaust pipe surrounded by the cover body. The internal exhaust pipe includes a diffusion exhaust pipe having a wide bore and a compression exhaust pipe having a narrow bore. Diffusion pores are drilled on a portion of the side surface of the internal exhaust pipe.

摘要翻译： 提供具有用于抑制波纹的尾管的排气消声器，增加发动机输出并提高燃料消耗效率。 在用于内燃机的排气管的中间设置有室。 设置有与排气管的排气口的端部连接的尾管。 多个翅片设置在尾管内部，螺旋形状朝着排气的排出方向逐渐变宽。 所述室包括盖体和由盖体包围的内部排气管。 内部排气管包括具有宽孔的扩散排气管和具有窄孔的压缩排气管。 在内部排气管的侧面的一部分上钻出扩散孔。

公开(公告)号：US08307945B2

公开(公告)日：2012-11-13

申请号：US13180073

申请日：2011-07-11

申请人： Predrag Todorovic

发明人： Predrag Todorovic

IPC分类号： F02K1/04 ,  F01N1/02 ,  F01N1/08 ,  F01N1/12 ,  F02K1/00 ,  F01N1/00

CPC分类号： F02K1/34 ,  F02K1/44 ,  F02K1/827 ,  F05D2250/232 ,  F05D2250/25 ,  Y02T50/671

摘要： A gas-turbine exhaust cone includes a cone shaped outside cone 1 closed in a flow direction, an inside cone 2 arranged in the outside cone 1 over at least part of the length of the exhaust cone, with the inside cone 2 being connected to the outside cone 1 via at least one helical partition wall 3, thereby forming an interspace 4 between the outside cone 1 and the inside cone 2. The interspace 4 is connected to inlet openings 5 at its inflow side and opens at an exit side 6 towards an interior 7 of the outside cone 1. A dampening element 8 is arranged in the outside cone 1 adjacent to the exit side 6 of the interspace 4.

摘要翻译： 燃气轮机排气锥体包括在流动方向上封闭的锥形外锥体1，内锥体2布置在外锥体1的至少部分长度的排气锥体上，内圆锥体2连接到 外圆锥体1经由至少一个螺旋分隔壁3，从而在外圆锥体1和内圆锥体2之间形成间隙4.间隙4在其入流侧连接到入口开口5，并在出口侧6朝向 外圆锥体1的内部7。阻尼元件8布置在邻近间隙4的出口侧6的外锥体1中。

公开(公告)号：US20110308884A1

公开(公告)日：2011-12-22

申请号：US13198779

申请日：2011-08-05

申请人： Jörg Melcher ,  Daniel Fingerhut ,  Christian Melcher

发明人： Jörg Melcher ,  Daniel Fingerhut ,  Christian Melcher

IPC分类号： F01N1/12

CPC分类号： F01N1/081 ,  F01N1/089 ,  F01N1/12

摘要： A sound absorber comprises an elongated gas channel, through which a flowing gas passes in operation of the sound absorber; and at least one helical fixture mounted in a longitudinal section of the gas channel. The helical fixture defines a helical gas passage through the longitudinal section of the gas channel. Further, the helical fixture defines at least one longitudinal Helmholtz resonator within the gas channel which is excited by sound waves propagating in the flowing gas passing through the at least one gas channel.

摘要翻译： 吸声器包括细长的气体通道，流动气体在吸声器的操作中通过该气体通道; 以及安装在气体通道的纵向部分中的至少一个螺旋固定器。 螺旋固定件限定通过气体通道的纵向部分的螺旋形气体通道。 此外，螺旋固定器限定气体通道内的至少一个纵向亥姆霍兹共振器，该谐振器由在穿过至少一个气体通道的流动气体中传播的声波激发。

公开(公告)号：US07644804B2

公开(公告)日：2010-01-12

申请号：US11924144

申请日：2007-10-25

申请人： Jayden David Harman

发明人： Jayden David Harman

IPC分类号： F01N1/12 ,  F15C1/16 ,  F01N1/08

CPC分类号： F15C1/16 ,  A61F2/82 ,  A61F2002/068 ,  A61F2002/30296 ,  A61F2230/0091 ,  F01N1/12 ,  F15D1/02 ,  F15D1/04 ,  F16L55/02772 ,  F25D25/025 ,  Y10T137/2087 ,  Y10T137/2098 ,  Y10T137/2104

摘要： A fluid pathway is provided with a flow controller in at least a portion of its length wherein the flow controller comprises an active surface capable of influencing the fluid flow through the fluid pathway, the configuration of the active surface conforming to at least one logarithmic curve conforming to the Golden Section.

摘要翻译： 流体通道在其长度的至少一部分中设置有流量控制器，其中流量控制器包括能够影响通过流体通路的流体流动的活动表面，活动表面的构造符合至少一个对数曲线 到黄金区。

公开(公告)号：US07380639B2

公开(公告)日：2008-06-03

申请号：US10962923

申请日：2004-10-12

申请人： Frank Josepn Arlasky

发明人： Frank Josepn Arlasky

IPC分类号： F01N1/12

CPC分类号： F01N1/125

摘要： The present invention provides an exhaust chamber system, comprising a stationary propeller type blade assembly with a nose cone within or adjacent to an expansion chamber, to create a vortex that swirls exhaust gas towards the outlet. The resultant vacuum within the exhaust chamber aids in scavenging an internal combustion engines exhaust gases, and in reducing system back pressure The exhaust chamber maintains the sound level of the exhaust within acceptable limits, while delivering improved horsepower, torque, and/or fuel efficiency over standard and other performance mufflers.

摘要翻译： 本发明提供了一种排气室系统，其包括固定螺旋桨式叶片组件，其具有位于膨胀室内或邻近膨胀室的鼻锥，以产生使废气朝向出口旋转的涡流。 排气室内产生的真空有助于清理内燃机废气，并减少系统背压。排气室将废气的声级保持在可接受的限度内，同时提供更好的功率，扭矩和/或燃料效率，超过 标准等性能消声器。

公开(公告)号：US07334663B2

公开(公告)日：2008-02-26

申请号：US11338716

申请日：2006-01-25

申请人： Tatsuya Nakayama ,  Mikihiko Suzuki

发明人： Tatsuya Nakayama ,  Mikihiko Suzuki

IPC分类号： F01N1/02 ,  F01N1/12 ,  F02M35/12 ,  F01N1/08 ,  F02M35/10 ,  F02M35/14

CPC分类号： F02M35/1255

摘要： A communicating pipe is disposed on an outer periphery of an air intake pipe, and a conduit is formed so as to be parallel to an air intake passage. A plurality of first communicating apertures are disposed through the air intake pipe so as to be arranged in a single row in a conduit direction and communicate between the conduit and the air intake passage. A resonance chamber is mounted to the communicating pipe so as to communicate with a first end of the conduit. A movable member is disposed so as to be movable in the conduit direction by sliding in contact with the inner wall surface of the communicating pipe. A second communicating aperture is disposed through the movable member so as to be placed above the first communicating apertures. A communicating channel length between the air intake passage and the resonance chamber is adjusted by changing a position of overlap of the second communicating aperture relative to the first communicating apertures by moving the movable member in the conduit direction.

摘要翻译： 连通管布置在进气管的外周上，并且形成为与进气通道平行的导管。 多个第一连通孔通过进气管设置成沿导管方向排列成一排，并且在导管和进气通道之间连通。 共鸣室安装在连通管上，以与导管的第一端连通。 可动构件通过与连通管的内壁面的滑动滑动而配置成能够在导管方向上移动。 第二连通孔设置成穿过可动构件以便放置在第一连通孔的上方。 通过在导管方向上移动可动件，改变第二连通孔相对于第一连通孔的重叠位置来调节进气通道和共鸣室之间的连通通道长度。