EP2394033A1 - Silencieux présentant des éléments encastrés hélicoïdaux - Google Patents

Silencieux présentant des éléments encastrés hélicoïdaux

Info

Publication number
EP2394033A1
EP2394033A1 EP10704784A EP10704784A EP2394033A1 EP 2394033 A1 EP2394033 A1 EP 2394033A1 EP 10704784 A EP10704784 A EP 10704784A EP 10704784 A EP10704784 A EP 10704784A EP 2394033 A1 EP2394033 A1 EP 2394033A1
Authority
EP
European Patent Office
Prior art keywords
gas
helical
silencer
gas channel
installation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP10704784A
Other languages
German (de)
English (en)
Other versions
EP2394033B1 (fr
Inventor
Jörg MELCHER
Daniel Fingerhut
Christian Melcher
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Deutsches Zentrum fuer Luft und Raumfahrt eV
Original Assignee
Deutsches Zentrum fuer Luft und Raumfahrt eV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Deutsches Zentrum fuer Luft und Raumfahrt eV filed Critical Deutsches Zentrum fuer Luft und Raumfahrt eV
Publication of EP2394033A1 publication Critical patent/EP2394033A1/fr
Application granted granted Critical
Publication of EP2394033B1 publication Critical patent/EP2394033B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
    • F01N1/081—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling by passing the gases through a mass of particles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
    • F01N1/089—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling using two or more expansion chambers in series
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
    • F01N1/12—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling using spirally or helically shaped channels

Definitions

  • the invention relates to a silencer with at least one gas channel through which a gas flows and the features of the preamble of the independent patent claim 1.
  • the flowing gas should be able to pass through as unhindered as possible.
  • the flowing gas propagating sound waves which are to be understood here as any fast pressure fluctuations of the flowing gas, but should be as damped as possible.
  • mufflers In addition to silencers, in which sound waves energy is removed by gas friction in porous material and converted into heat, are also known mufflers that absorb sound dynamically. In engineering they are referred to as acoustic absorbers, in physics as dynamic absorbers. These are resonance systems that absorb sound occurring at their natural frequency very well and can dissipate in the sequence. Examples include so-called hole or Helmholtz resonators. It is also part of the measures known in the field of dynamic sound absorbers to build up acoustic resonators with the aid of one or more cross-sectional jumps, ie changes in the diameter of the pipe delimiting a gas duct. As a result, however, the flow resistance for the gas flowing through the muffler gas is drastically increased.
  • a helical installation is provided in a gas channel through which a gas flows, which gives a helical course to an interior region of the gas channel.
  • the sound is to be reduced at the helical surfaces of the helical installation by reflection and scattering and subsequent absorption in the channel wall of the gas channel and also prevented due to the so-called cut-off effect on its propagation.
  • the gas channel is surrounded by an annular channel which communicates via perforations with the gas channel and is arranged in the sound absorption material, such as ceramic wool.
  • a vote on one or more main sound frequencies, ie a particularly high efficiency at these main sound frequencies is not possible in the known muffler.
  • DE 10 2004 006 031 A1 discloses a device for reducing pressure pulsations in fluid-carrying line systems.
  • a throttle body is arranged in a line of the conduit system, which has a helical coil whose screw axis is aligned in the propagation direction of the pressure pulsations in the conduit.
  • the pressure pulsations interact with the helical coil.
  • This may be a passive interaction under elastic shaping of the helical coil.
  • the helical coil can be activated actively.
  • It can also be arranged a plurality of throttle body in the form of helical coils in a fixed distance between the throttle bodies in a row in the respective line.
  • the teaching of DE 10 2004 006 031 A1 expressly, unlike that of DE 199 32 714 A1, does not relate to gas flow-through, but only to liquids leading piping systems.
  • an absorber for absorbing airborne sound in which an acoustic series circuit and an acoustic parallel circuit are coupled together, wherein the acoustic series circuit is a Helmholtz resonator.
  • This Helmholtz resonator consists of a hollow body with an air volume and a cross-sectional constriction as an opening.
  • the parallel circuit is also a resonator, which is realized by a parallel connection of an acoustic suspension - realized by an air volume - with an acoustic mass, which is given by the oscillating air in a neck.
  • the acoustic series circuit and the acoustic parallel circuit are tuned to the same resonant frequency.
  • the known absorber as such is not traversed by a gas, but is provided to form a generally gas-tight wall in a sound-absorbing manner.
  • the temporary entry of gas into the hollow body or air volumes of the known absorber unlike a gas-flowed muffler, does not lead to any net gas flow that runs through it.
  • GB 460,148 A discloses a further muffler for internal combustion engines with the feature of the preamble of independent claim 1.
  • embodiments of the known muffler which have a plurality of gas channels, which is divided by the flowing gas.
  • Helical internals may be provided inside the gas channels.
  • the helical internals may have at their ends inlet and outlet areas in which their diameter in the direction of flow of the gas steadily approaches from the inside to the wall of the gas channel and from this.
  • the slope of the helical internals of the known muffler can be variable.
  • the gas channels may also have tapers and extensions of their free cross section along their main extension direction.
  • the multiple gas channels are z. B. are used for the extinguishing superposition of sound waves, which propagate in the flowing gas.
  • the invention has for its object to provide a muffler with the features of the preamble of independent claim 1, which has a high noise attenuation compared with the flow resistance of the gas through the muffler with passive means.
  • dampers are described in the dependent claims 2 to 14.
  • the dependent claim 15 relates to preferred uses of the new silencer.
  • a Helmholtz resonator is formed in the gas channel, which is excited in the gas channel by means of at least one helical installation in a gas channel through which a gas flows, the installation an inner region of the gas channel spread the gas channel flowing gas.
  • a cavity in the flow direction of the gas is limited by opposing impedance jumps for the propagating in the gas sound waves.
  • energy is trapped by a continuous sound wave whose wavelength matches the length of the cavity, i. H. to which the Helmholtz resonator is tuned.
  • the gas channel can be free, ie have no helical installation.
  • the muffler may also have another helical installation adjacent thereto or other characteristics of the helical installation adjacent thereto.
  • the opposing impedance jumps for limiting the cavity of the Helmholtz resonator can be set not only by the termination and resumption of helical installation on both sides of the cavity, but also by opposing changes in the pitch and / or diameter of the at least one helical installation.
  • the at least one helical installation including a wall of the gas channel surrounding it, can have at least two local constrictions or at least one local expansion.
  • a constriction has - acoustically speaking - the effect of an inertial mass whose impedance becomes very high for high frequencies. In particular, the high frequencies are not allowed to pass through such a constriction.
  • a Helmholtz resonator is formed according to the invention.
  • the helical installation causes a reduced power dissipation of the gas flowing through the constrictions, by passing the gas through the constriction, thus preventing, in particular, turbulent turbulence of the gas behind the constriction.
  • An expansion acts like a spring, so it is very high-impedance at low frequencies.
  • the helical installation prevents turbulence associated with loss of the gas flowing into the expansion.
  • a Helmholtz resonator can already be formed within such an expansion between its flanks.
  • the gas channel of the new muffler may have a circular cross-sectional area which is spanned by the at least one helical installation with a double-flighted HeNx.
  • a circular cross-sectional area of the gas channel a single helix for the formation of the helical installation is generally inadequate, since it leaves a passage region for sound waves, which is almost unaffected by it, close to its axis.
  • the gas channel has an annular cross-sectional area, it is sufficient if it is spanned by the helical installation with at least one helical coil.
  • the new muffler also several gas channels may be provided, to which the flowing gas is divided.
  • one of these gas passages may have a circular cross-sectional area and another of these gas passages may have an annular cross-sectional area lying around it.
  • this is designed as a two-circuit resonant absorber, in which in two gas ducts, on which the flowing Gas is distributed to the same frequencies of stimulating sound waves tuned Helmholtz resonators are provided, of which the one or more Helmholtz resonators are designed in the one gas channel as an acoustic parallel circuit and the Helmholtz or the resonators in the other gas channel as an acoustic series circuit.
  • a dual-circuit resonant absorber as already known in principle from DE 195 33 623 B4, is used for the first time in a gas-flow system in which the gas flows through the Helmholtz resonators themselves.
  • a plurality of Helmholtz resonators can also be formed one behind the other in a gas channel. This is preferred, for example, to attenuate sound waves with a particularly disturbing main sound frequency as completely as possible. In this case, all or at least several of the Helmholtz resonators arranged one behind the other are then to be matched to precisely this main sound frequency.
  • Helmholtz resonators connected in series can also be tuned to different frequencies, whereby in turn for each frequency a plurality of Helmholtz resonators can be provided.
  • the at least one helical installation of the new silencer is actively deformable.
  • this active deformability can be used to detune a Helmholtz resonator formed by means of the helical installation.
  • in the quasistatic range it is possible to vary the impedance jumps occurring at the helical installation.
  • active generation of antisound by active dynamic deformation of the helical assembly is also possible to provide an actively sound-attenuating effect in addition to the passive-absorbing function of the Helmholtz resonators.
  • the sound waves at the ends, especially at the entrance of the new muffler should not reflect unnecessary become.
  • a low-reflection, soft impedance transition is obtained when the helical installation has at least one end of the muffler an inlet or outlet region by its diameter in the direction of flow of the gas steadily approaches from the inside to the wall of the gas channel or from this. The sound waves thus reach almost completely into the new silencer and are then selectively absorbed there.
  • Applications for the new silencer are available for all gas-flow pipes, where the gas leads unsteady pressure fluctuations and in particular sound waves.
  • Such tubes exist in internal combustion engines, heaters, such as for the exhaust air of a burner, ventilation systems and the like.
  • the new muffler can be used advantageously when the sound waves or unsteady pressure fluctuations have a fixed frequency to which the Helmholtz resonator is tunable.
  • a silencer is shown in a perspective side view with cut-wall of a gas channel in each case.
  • FIG. 1 shows a first silencer according to the invention, in which two Helmholtz
  • Resonators which are tuned to the same frequencies, are formed in a gas channel through which the ends are designed so that they are free of reflection for sound waves.
  • 2 shows a silencer according to the invention, in which only one Helmholtz
  • Resonator is formed in a flowed through gas channel. Again, the ends of the muffler for sound waves are designed to be low reflection.
  • FIG. 3 shows a modification of the silencer according to the invention according to FIG. 1, in which the two end-side helical internals have larger numbers of turns than in the embodiment according to FIG. 1.
  • Fig. 4 shows a modification of the silencer according to the invention according to the
  • Fig. 5 shows a modification of the silencer according to the invention according to the
  • Fig. 1 and 3 in which three Helmholtz resonators, which are tuned to the same frequencies, are formed one behind the other in the gas channel.
  • Fig. 6 shows a modification of the silencer according to the invention according to the
  • Fig. 1 and 3 in which four Helmholtz resonators, which are tuned to the same frequencies, are formed one behind the other in the gas channel.
  • Fig. 7 shows a modification of the silencer according to the invention, in which a total of six Helmholtz resonators are formed one behind the other in the gas channel. Unlike in the previous figures, the end-side helical internals in this embodiment, no inlet or outlet areas with low sound reflection on.
  • FIG. 8 shows a muffler according to the invention, in which two Helmholtz resonators are formed by three constrictions of a helical installation in the gas duct together with the wall of the gas duct.
  • FIG. 9 shows an embodiment of the silencer according to the invention, in which a Helmholtz resonator is formed by an expansion of the cross section of the gas channel together with the helical installation provided therein.
  • Fig. 10 shows a silencer according to the invention with a series circuit of a
  • Helmholtz resonator according to FIG. 8 a Helmholtz resonator according to FIG. 9 and a further Helmholtz resonator according to FIG. 8, wherein the constrictions and the expansion are less pronounced than in the preceding FIGS. 8 and 9.
  • Fig. 11 shows an embodiment of the new silencer, in which the flowing
  • Gas is divided into two gas channels, in each of which a Helmholtz resonator is formed, which are tuned to the same resonant frequency, but one of which is designed as an acoustic parallel circuit and the other as an acoustic series circuit.
  • Fig. 12 shows an embodiment of the silencer according to the invention, in which in
  • a silencer 1 outlined in FIG. 1 has three helical internals 4, 5 and 6 in a tube 2 with a wall 3.
  • the helical installation 5 lies between the end-side helical internals 4 and 6 and has a same free distance 7 in the direction of the tube axis 8 of the tube 2 for each of these.
  • Each of the helical internals 4-6 consists of a twinned HeNx 9 twisted around the tube axis 8.
  • the diameter of the double-start HeNx 9 of the end-side helical internals 4 and 6 increases continuously from zero to the diameter of the tube 2. Wherever the two-start HeNx 9 has the diameter of the tube 2, it is firmly mounted on the wall 3.
  • the double-flighted helices 9 impart a helical course to an inner region 10 of a gas channel 1 1 leading through the tube 2 and bounded by the wall 3 thereof.
  • each of the double-flighted helices 9 delimits two helically extending part inner regions 12 of the gas channel 8 from one another.
  • the helical internals 4-6 For a gas flow along the tube axis 8 through the gas channel 11 mean the helical internals 4-6, although an increase in the flow resistance. However, this increase in the flow resistance is comparatively small. For yourself in the flowing gas wide sound waves, however, mean that the helical internals 4-6 show a strong variation of the impedance.
  • This variation is continuous at the ends of the muffler 1 due to the continuously changing diameters of the double-flighted helices.
  • impedance jumps occur.
  • two Helmholtz resonators 13 are formed in the muffler 1, the cavities or cavities 14 correspond to the free pipe cross section along the distances 7.
  • Both Helmholtz resonators 13 are tuned by the same distances 7 to the same frequencies, which is a main sound frequency, which occurs in the gas flowing through the gas channel 11 gas. Sound waves with this main sound frequency is deprived of energy by the Helmholtz resonators 13, which is ultimately converted into heat. This is done in comparison to the efficiency of the sound attenuation only minimal impairment of the gas flow, ie with minimal flow resistance for the flowing gas.
  • the embodiment of the muffler 1 according to FIG. 2 differs from that according to FIG. 1 in that only one Helmholtz resonator 13 is formed, in which no additional helical installation between the helical internals 4 and 6 is provided.
  • the geometric relationships in the helical internals 4 and 6 are different than in Fig. 1, by the number of turns greater and the end inlet or outlet areas in which the diameter of the helical two-helical 9 steadily from zero to the diameter of the tube 2 extended, longer stretched.
  • the frequency to which the respective muffler 1 is tuned depends essentially on the length of the cavity 14 of its Helmholtz resonators 13, d. H. from the distance 7. This length must be adjusted so that waves standing here can form with the wavelength of the main sound frequency of interest. That is, it depends not only on the geometric distance 7 but also on the speed of sound propagation within the gas channel 10 and thus on the gas guided therefrom and its state.
  • the muffler 1 according to FIG. 3 again essentially corresponds to FIG. 1, d. H. There is again an additional helical installation 5 available. However, the geometric data of the muffler 1 are varied compared to FIG.
  • the muffler 1 according to FIG. 4 differs from those according to FIGS. 1 and 3 again by its geometrical dimensions. While so far all two-stringed Helices 9 in the helical internals 4 to 6 had the same slope, here in the helical installation 5 a strongly deviating upward slope is provided. In this way, a further Helmholtz resonator 15 may be formed, the cavity of which extends along the helical partial inner regions 12 in the region of the helical installation 5. In principle, the formation of such a further Helmholtz resonator 15 is conceivable in all helical installations 4-6.
  • the attenuation within the helical internals 4-6 at a smaller pitch of the double-flighted helices 9 for the formation of an effective resonator is quickly too large.
  • the function as a Helmholtz resonator is also hindered by the outgoing diameter of the double-flighted helices 9, because this means a flowing impedance transition and no impedance jump.
  • a flowing impedance transition does not reflect sound waves in the gas within the gas channel 11 and is therefore unsuitable for limiting the cavity of a Helmholtz resonator.
  • this flowing transition serves specifically to allow the sound waves initially to enter the silencer 1 unhindered, in order then to absorb them there.
  • the silencer 1 according to FIG. 5 again has in all helical internals 4-6 equal gradients of the double-flighted helices 9. However, two helical internals 5 are now provided between the end-side helical internals 4 and 6. Also between these helical internals 5 is the same distance 7 as before to the helical internals 4 and 6. Accordingly, three Helmholtz resonators 13 are formed here. Depending on the configuration of the helical internals 5, additional Helmholtz resonators 15 (not shown here) may in principle also be formed in their regions.
  • the muffler 1 according to FIG. 6 also has a further central helical installation 5, so that a total of four Helmholtz resonators 13 are formed here between the helical internals 4-6.
  • the pitch of the double-flighted helices 9 of the helical internals 5 is significantly smaller than in the case of the double-flighted helices 9 of the end-side helical internals 4 and 6.
  • FIG. 7 shows a silencer 1 in which six Helmholtz resonators are formed over the free spacings 7 with the aid of a total of five central helical internals 5 between the end-side helical internals 4 and 6, and in which the end-side helical internals are formed 4 and 6 abruptly, ie with full diameter of their double-flighted Helices 9 end.
  • an impedance jump is formed at the ends of the muffler 1.
  • an additional Helmholtz resonator 15 can also be formed here within each helical installation 4-6.
  • Fig. 8 outlines a muffler 1, in the tube 2 only a single helical installation 4 is provided. This helical installation 4 runs at both ends of the muffler 1 to the
  • Pipe axis 8 steadily decreasing diameter of its two-start HeNx 9 out, there to form low-reflection transitions.
  • the helical installation 4 and the tube 2 have three common constrictions 17.
  • the tube 2 and the helical installation 4 instead of the constrictions 17 according to FIG. 8 have a widening 19 for forming a Helmholtz resonator 18 between their flanks 20.
  • the whole expansion 19 also acts like a spring.
  • constrictions 17 according to FIG. 8 and the widening 19 according to FIG. 9 are combined to form different Helmholtz resonators 16 and 18.
  • the principle known from DE 195 33 623 B4 principle of a dual-circuit resonant absorber is applied with an acoustic series circuit and an acoustic parallel circuit to a muffler for a flowing gas.
  • the gas is divided into two gas channels 21 and 22, wherein the gas channel
  • 21 is an annular channel extending between the tube 2 and an inner tube 23, during the
  • Gas channel 22 passes through the inner tube 23.
  • the inner regions 24 and 25 of the gas channels 21 and 22 are here each formed by helical internals 26 and 27 to screw flights.
  • the helical internals 6 in the annular gas channel 21 can also be single helices, as shown here. With the helical internals 26 and 27, Helmholtz resonators 28 and 29 are formed in both gas channels 21 and 22, but here the order of helical internals 26 and 27 and their free distances between the gas channels 21 and 22 is reversed. D. h., At the ends of the gas channel 21 are helical internals and at the ends of the gas channel 22 are free spaces. The acoustic parallel circuit forms the gas channel 22, which has the end-side free spaces. These form acoustic springs, while the helical internals 26 and 27 correspond to acoustic masses.
  • a particularly high absorption power is achieved at the main sound frequency, to which the individual Helmholtz resonators 28 and 29 are tuned.
  • the two embodiments of the muffler according to FIGS. 11 and 12 differ by the geometric structure of the helical internals 26 and 27.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)

Abstract

L'invention concerne un silencieux (1), présentant au moins un canal de gaz (11) qui est traversé par un gaz et dans lequel est agencé au moins un élément encastré hélicoïdal (4) qui donne à la zone intérieure (10) du canal de gaz une forme d'hélice. Ledit élément encastré hélicoïdal (4) permet d'agencer, dans le canal de gaz (11), un résonateur (13) excité par des ondes sonores qui se propagent dans le gaz s'écoulant.
EP10704784.7A 2009-02-05 2010-02-02 Silencieux avec inserts hélicoïdaux Not-in-force EP2394033B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009000645A DE102009000645B3 (de) 2009-02-05 2009-02-05 Schalldämpfer mit mindestens einem mittels helikaler Einbauten aufgebauten Helmholtz-Resonator
PCT/EP2010/051217 WO2010089283A1 (fr) 2009-02-05 2010-02-02 Silencieux présentant des éléments encastrés hélicoïdaux

Publications (2)

Publication Number Publication Date
EP2394033A1 true EP2394033A1 (fr) 2011-12-14
EP2394033B1 EP2394033B1 (fr) 2015-03-25

Family

ID=42101956

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10704784.7A Not-in-force EP2394033B1 (fr) 2009-02-05 2010-02-02 Silencieux avec inserts hélicoïdaux

Country Status (5)

Country Link
US (1) US8312962B2 (fr)
EP (1) EP2394033B1 (fr)
DE (1) DE102009000645B3 (fr)
DK (1) DK2394033T3 (fr)
WO (1) WO2010089283A1 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AUPR982302A0 (en) * 2002-01-03 2002-01-31 Pax Fluid Systems Inc. A fluid flow controller
AU2003903386A0 (en) * 2003-07-02 2003-07-17 Pax Scientific, Inc Fluid flow control device
US8408358B1 (en) * 2009-06-12 2013-04-02 Cornerstone Research Group, Inc. Morphing resonators for adaptive noise reduction
JP6200362B2 (ja) * 2014-03-26 2017-09-20 川崎重工業株式会社 排気装置
US9500108B2 (en) * 2015-01-09 2016-11-22 Flexible Metal, Inc. Split path silencer
WO2016137987A1 (fr) 2015-02-24 2016-09-01 Tenneco Automotive Operating Company Inc. Système mélangeur à double vrille
US9618151B2 (en) * 2015-02-26 2017-04-11 Adriaan DeVilliers Compact modular low resistance broadband acoustic silencer
US9534525B2 (en) 2015-05-27 2017-01-03 Tenneco Automotive Operating Company Inc. Mixer assembly for exhaust aftertreatment system
FI128355B (en) * 2019-01-29 2020-03-31 Teknologian Tutkimuskeskus Vtt Oy Silencers and elements and process for making them
CN112185326B (zh) * 2020-08-25 2024-05-24 西安交通大学 一种双螺旋耦合水下吸声超表面结构
CN113539223B (zh) * 2021-07-11 2022-05-06 哈尔滨工程大学 一种亥姆霍兹吸声装置
WO2023080864A1 (fr) * 2021-11-08 2023-05-11 Metapax Akustik Muhendislik Danismanlik Egiti̇m Sanayi Ve Ticaret Anonim Sirketi Silencieux d'écoulement de métamatériau acoustique à large bande
DE202024102715U1 (de) 2024-05-24 2024-06-10 Roman W. Dahlheim Schalldämpfer für eine Schusswaffe und eine Schusswaffe

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2031451A (en) * 1933-03-17 1936-02-18 Chester L Austin Exhaust silencer for internal combustion engines
GB460148A (en) * 1934-07-19 1937-01-18 Zygmunt Wilman Improvements relating to exhaust gas mufflers
FR804593A (fr) 1936-04-04 1936-10-27 Appareil silencieux accélérateur d'échappement des gaz dans les moteurs et machines motrices à combustion interne
US2359365A (en) * 1943-05-20 1944-10-03 Katcher Morris Muffler
US3182748A (en) * 1961-08-15 1965-05-11 Garrett Corp Helical vane for sound absorbing device and method of making said vane
US3746126A (en) 1971-07-09 1973-07-17 Cardenas I De Sound-muffling device
US3888331A (en) * 1974-05-03 1975-06-10 Gen Motors Corp Power tuned wave interference silencer
JPS5412099Y2 (fr) * 1974-11-12 1979-05-29
US4339918A (en) * 1980-09-11 1982-07-20 Hirokuni Michikawa Means for accelerating the discharge of exhaust gas from an internal combustion engine
EP0184060A1 (fr) * 1984-11-22 1986-06-11 Tula Silencers (Proprietary) Limited Silencieux d'échappement
US4667770A (en) * 1986-10-02 1987-05-26 Devane Harry M Sound attenuator
US4792014A (en) * 1987-12-24 1988-12-20 Shin Seng Lin Tail pipe for drafting engine exhaust gas
DE19533623B4 (de) * 1995-09-12 2005-04-28 Continental Ag Absorber zur Absorption von Luftschall
DE19644089A1 (de) 1996-10-31 1998-05-14 Deutsch Zentr Luft & Raumfahrt Schalldämpfer
DE19932714C2 (de) * 1999-07-16 2001-05-03 Deutsch Zentr Luft & Raumfahrt Rohrförmige luftdurchströmte Vorrichtung mit aktiver Schallreduktionseinrichtung
DE102004006031B4 (de) * 2004-02-06 2006-11-16 Deutsches Zentrum für Luft- und Raumfahrt e.V. Verfahren und Vorrichtung zur Reduzierung von Druckpulsationen in Flüssigkeiten führenden Leitungssystemen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2010089283A1 *

Also Published As

Publication number Publication date
EP2394033B1 (fr) 2015-03-25
US20110308884A1 (en) 2011-12-22
DK2394033T3 (en) 2015-05-04
WO2010089283A1 (fr) 2010-08-12
DE102009000645B3 (de) 2010-07-29
US8312962B2 (en) 2012-11-20

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