摘要:
An apparatus comprising includes a conduit portion having a conduit inner surface and a conduit outer surface, and a plurality of chambers in fluid communication with the conduit portion. The chambers include a first chamber defined, at least in part, by a first outer housing and a first chamber volume. The first chamber is in fluid communication with the conduit portion. A fluid is permitted to flow between the conduit portion and the first chamber through a first flow area. The chambers also include a second chamber defined, at least in part, by a second outer housing and a second chamber volume. The second chamber is in fluid communication with the conduit portion. A fluid is permitted to flow between the conduit portion and the second chamber through a second flow area. The first chamber volume is generally equal to the second chamber volume and the first flow area is greater than the second flow area. The chambers further include a third chamber defined, at least in part, by a third outer housing and a third chamber volume. The third chamber is in fluid communication with the conduit portion. A fluid is permitted to flow between the conduit portion and the third chamber through a third flow area, wherein the first chamber volume is greater than the third chamber volume.
摘要:
An internal combustion engine is capable of improving cleaning efficiency by preventing an increase in the temperature of the exhaust gas to lessen the deterioration of the catalyst. The internal combustion engine 1 includes a convergent section 32, a divergent section 33, and a branch section 21. The branch section 21 branches a shock wave 35, propagating in a downstream direction at a higher velocity than exhaust gas 36 flowing into an exhaust path 16 from a combustion chamber 10 when an exhaust valve 9 is opened, from a portion of the exhaust path 16 which is upstream with respect to the divergent section 33, and propagates the shock wave 35 back to the exhaust path 16. The exhaust gas 36 is caused to pass the convergent section 32 and to collide against the shock wave 35 between the branch section 21 and the divergent section 33, thus to increase the pressure of the exhaust gas 36 in the convergent section 32. Such exhaust gas 36 is caused to pass the divergent section 33 to generate a new shock wave 35b and thus to decrease the temperature of the exhaust gas. A catalyst 41 of an exhaust cleaning device 40 is provided in a portion of the exhaust path 16 which is downstream with respect to the divergent section 33.
摘要:
Noise damper for a radial (centrifugal) compressor, to be either integrally formed in the compressor housing or provided as a pipe section piece to be mounted on one of the housing nozzles. The damper consists of one or more side resonators, possibly of the Helmholtz-type. The side resonators may be arranged in series in the flow direction. A simple, modular and cost-effective construction of the damper consists in juxtaposing rings (diaphragms, discs) having concentric outer diameters but inner contours that are not necessarily circular and that differ from each other. The resonator cavities then result from adjacent rings having different inner contours. These contours can be circles of different diameters, possibly eccentric, triangles, squares, or a circumferential array of radially staggered tubes. A self-cleaning mechanism by injection of liquid may be added to the damper. The cleaning liquid may be recuperated by a gas scrubber provided upstream of the compressor.
摘要:
Die Erfindung betrifft eine Vorrichtung zum Dämpfen von Schallgeräuschen mit einem Außenrohr und einem perforierten Innerohr, das dadurch gekennzeichnet ist, dass sich zwischen Außenrohr und perforiertem Innerohr ein Schallabsorptionssystem mit einer Temperaturbeständigkeit bis mindestens 80 Grad Celsius befindet. Zudem betrifft die Erfindung einen Heizkreislauf und/oder einen Wasserkreislauf, der ein, zwei, drei oder mehr Vorrichtungen zum Dämpfen von Schallgeräuschen umfasst.
摘要:
Für ein frühzeitiges Erkennen von störenden Schwingungen in einer Fluidströmung ist eine Vorrichtung (24) vorgesehen, mit deren Hilfe Schallschwingungen in der Fluidströmung gemessen werden. Die Vorrichtung (24) umfasst einen akustischen Filter (32) zum Verstärken von Schallschwingungen einer vorgegebenen Frequenzbandbreite und einen Drucksensor (28) zum Erfassen und Ausgeben der in der Fluidströmung auftretenden Schwingungen. Die Vorrichtung (24) ist besonders geeignet zum Messen von thermoakustischen Schwingungen in einer Gasturbinenanlage (2).
摘要:
An acoustic liner (20) includes a remote panel (26), a proximate panel ( 28 ) transversely spaced from the remote panel ( 26 ) and a resonator chamber ( 34b ) residing between the panels ( 22 , 26 ). Perforations ( 38 ) penetrate the proximate panel ( 22 ) in registration with the resonator chamber ( 34b ). A neck ( 56 ) with an inlet ( 58 ) recessed from the proximate panel ( 22 ) establishes communication between the chamber ( 34b ) and a fluid stream ( G ) flowing past the proximate panel ( 22 ). A bypass coolant passage ( 66 ) guides coolant through the perforations ( 38 ) without guiding it through the resonator chamber ( 34b ).
摘要:
Abgasanlage für Brennkraftmaschinen, insbesondere Kraftfahrzeugmotoren, mit einem Schalldämpfer (1,1'), insbesondere Nachschalldämpfer, mit einer Abgaseintrittsöffnung (2,2'), einer Abgasaustrittsöffnung (3,3'), einem vom Abgas durchströmten Bereich (7,12) und einem vom Abgas nicht durchströmten Bereich (18,21,23), wobei zur Verringerung des Gegendrucks und zur Verbesserung des Abgasgeräusches bei hohen Drehzahlen insbesondere eines Turbomotors der vom Abgas durchströmte Bereich (7,12) deutlich kleiner ist als der vom Abgas nicht durchströmte Bereich (18,21,23).
摘要:
An exhaust system for improving the torque characteristics of a single cylinder for stroke spark ignition engine which exhaust system comprises a header pipe (1), a chamber (14) and a muffler (15); one end with exhaust flange (12) of the said header pipe being adapted for connection to an engine exhaust port and the other end being connected to the said muffler (15); the said chamber (14) being connected between said one end with exhaust flange (12) and said muffler (15) at a point preferably between 40% to 60% of developed length of header pipe from the face of the said exhaust flange (12) along the length of said header pipe.