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8225592 |
Microjet noise suppression system for jet engines
A jet engine noise suppression system uses a plurality of microjets that are located on a frame downstream of the exhaust port of a jet engine. Each microjet issues a microjet flow, either liquid...
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8220586 |
Noise-reduced aircraft engine and method for reducing noise emissions of an aircraft engine
A method for reducing noise emissions of an aircraft engine (3) having a gas turbine (7), includes providing a hot gas layer underneath at least one noise-emitting area of the aircraft engine.
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8157050 |
Device for reducing noise generated by an aircraft jet engine with curve ducts
A jet engine, including a wall surrounding a first gas flow ejected from a downstream end of the wall along a longitudinal axis, a second flow of gas running outside the wall in a direction of...
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8069647 |
Jet nozzle mixer
An external jet nozzle mixer includes identically formed lobes. The external mixer works with the internal mixer further to mix the engine internal bypass flow with the internal jet engine core...
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8069666 |
System for generating shaft horsepower using waste heat
One or more systems for generating shaft horsepower by using waste heat from combustion exhaust are provided herein. The system can include a heat recovery silencer, a turbine, a compressor, a...
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7882696 |
Integrated support and mixer for turbo machinery
A support and air mixer includes an inner annular member, an outer annular member shaped and positioned such that an annular air gap is formed between the inner annular member and the outer annular...
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7866141 |
Cooling device for the primary nozzle of a dual-flow turbojet engine
The invention relates to a dual-flow turbojet engine comprising an engine which is disposed in a nacelle and is provided with case which defines jointly with the said nacelle an annular passage...
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7827780 |
Assembly procedure for the adjustable pin-valve, fuel shut-off
A protocol for assembling a fuel shut off pin valve assembly for a turbo fan engine. The protocol outlines a specific sequence of events in order to ensure failsafe incorporation of a fuel shut off...
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7802752 |
Jet engine noise suppressor
An embodiment of the invention is a technique to suppress noise in a jet engine. A substantially annular fan nozzle is attached to a pylon and discharges a fan stream into atmosphere from an aft...
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7784270 |
Rotary motion mixer for a converging-stream nozzle of a turbomachine
The invention relates to a mixer for a bypass turbomachine, the mixer comprising a member having a sinusoidal portion at its end defining inner lobes and outer lobes, each outer lobe comprising a...
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7735601 |
Engine noise
In order to provide noise suppression, bumps or undulations are provided on a nozzle surface in order to vary the convergent-divergent ratio between that surface and an opposed nozzle surface. By...
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7677026 |
Mixer for separate-flow nozzle
A mixer for a separate-stream turbojet nozzle, the mixer comprising along a longitudinal axis (X-X′) both a fastener shroud (10) for connecting said mixer to the exhaust casing of the nozzle, and a...
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7581384 |
Turbomachine nozzle cover provided with triangular patterns having a point of inflexion for reducing jet noise
The invention relates to an annular cover for a turbomachine nozzle, the cover having a plurality of patterns extending a trailing edge of said cover and spaced apart circumferentially from one...
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7578369 |
Mixed-flow exhaust silencer assembly
An exhaust silencer assembly comprising a casing having an exhaust gas entrance opening, an exhaust gas exit opening, and a cooling air inlet opening, and an acoustic-attenuating porous liner...
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7516815 |
Arrangement for the generation of sonic fields of a specific modal composition
A device for simulating sound produced by certain equipment, for example a rotor-stator arrangement of a turbomachine, or for generation of opposing sound fields for active sound control, including...
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7448215 |
Combustion chamber for a gas turbine engine
A combustion chamber suitable for a gas turbine engine is provided with at least one Helmholtz resonator having a resonator cavity and a resonator neck in flow communication with the chamber...
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7434384 |
Fluid mixer with an integral fluid capture ducts forming auxiliary secondary chutes at the discharge end of said ducts
A fluid mixer for mixing two fluid streams 40, 42 includes a set of main lobes 26 defining alternating primary and secondary main chutes 30, 32, one or more auxiliary lobes 28 intermediate two of...
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7392651 |
Turbomachine nozzle cover for reducing jet noise
A cowl for a turbomachine nozzle, the cowl having a plurality of repeated patterns disposed circumferentially at a trailing edge, each pattern being asymmetrical about a midplane of the pattern...
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7389635 |
Twisted mixer with open center body
An exhaust mixer assembly having a twisted mixer and an open centerbody is provided. The open centerbody is centrally disposed within the twisted mixer and helps to provide efficient cooling of...
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7310939 |
Device for reducing the jet noise of a turbomachine
A device for reducing the jet noise of a turbomachine, the turbomachine having a longitudinal axis and a substantially cylindrical nozzle extending along the longitudinal axis of the turbomachine,...
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7308966 |
Device for reducing jet engine exhaust noise using oscillating jets
A device for reducing engine exhaust noise in an aircraft engine includes a number of oscillating jets which direct an oscillating flow into the engine exhaust. The oscillating jets are connected...
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7251927 |
Jet nozzle mixer
A second stage external jet nozzle mixer (20) includes identically formed lobes which equal in number the lobes of the first stage internal mixer. The external mixer works with the internal mixer,...
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7246481 |
Methods and apparatus for operating gas turbine engines
A method for operating a gas turbine engine includes channeling compressed air from the gas turbine engine to a noise suppression system, and selectively operating the noise suppression system such...
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7080514 |
High frequency dynamics resonator assembly
Aspects of the invention relate to resonator assemblies for use in non-uniform flow environments. The resonator assemblies include one or more features, such as a box or a scoop, for substantially...
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7065957 |
Segmented mixing device for jet engines and aircraft
Disclosed is a means for reducing jet engine exhaust noise wherein mixing is enhanced between adjacent exhaust flows and between exhaust flow and free-stream flow. Also disclosed is a means for...
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7062908 |
Construction for exhaust emission control
An object of the present invention is to provide a construction for exhaust emission control, which can prevent thermal deterioration in a catalyst and can heat exhaust gas to a catalyst activation...
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7055329 |
Method and apparatus for noise attenuation for gas turbine engines using at least one synthetic jet actuator for injecting air
A method enables a gas turbine engine to be operated. The method comprises channeling exhaust gases from a core engine through an exhaust assembly and past at least one flow boundary surface, and...
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7055308 |
Detonation damper for pulse detonation engines
An engine includes at least one pulse detonation chamber configured to receive and detonate a fuel and an oxidizer. The pulse detonation chamber has an outlet end and includes a porous liner...
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7043898 |
Combined exhaust duct and mixer for a gas turbine engine
A gas turbine engine including a gas exhaust duct assembly which comprises an annular shroud forming at least a section of an inner wall of a gas exhaust duct, a plurality of strut members radially...
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6971229 |
Confluent exhaust nozzle
A gas turbine engine exhaust nozzle includes a nacelle having an inlet and main outlet at opposite ends, and a main duct extending therebetween. A secondary bypass duct extends radially through the...
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6910550 |
Muffler arrangement for an internal combustion engine
A muffler arrangement includes an exhaust-gas muffler, which is subdivided into an inlet space and an outlet space. An exhaust-gas stub of an internal combustion engine opens into the inlet space....
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6896100 |
Noise reducing apparatus and exhaust nozzle for jet engine
In order to reduce noise effectively and to provide a light-weight noise reducing apparatus and an exhaust nozzle for a jet engine, a mixer for mixing an exhaust gas and an external air is disposed...
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6804948 |
Lobe mixer for jet engine
A lobe mixer (22) used in jet engines, is provided with diameter expansion portions (22a) in which the diameters gradually increase in the downstream direction, in which adjacent diameter expansion...
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6718752 |
Deployable segmented exhaust nozzle for a jet engine
An exhaust flow nozzle for a jet engine having a plurality of flow altering components extending from a lip portion of a secondary exhaust nozzle that are movable between first and second...
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6640537 |
Aero-engine exhaust jet noise reduction assembly
A gas turbine engine of a fan bypass type includes an exhaust shroud having a perforated tubular wall extending between a forward end and an aft end. The exhaust shroud is adapted to be affixed to...
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6615857 |
Modular flow control actuator
The present invention is a flow control actuator capable of exciting a fluid via the coupling of edge tones generated along a wedge and resonance generated within a cavity. The invention consists...
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6615576 |
Tortuous path quiet exhaust eductor system
A tortuous path quiet exhaust eductor system may be mounted to a gas turbine engine, such as commercial aircraft APU. The system includes an oil cooler, eductor primary nozzle, oil cooler air...
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6606854 |
Exhaust mixer and apparatus using same
Disclosed is an exhaust mixer (50) including a passage (54) extending from an inlet (56) to an outlet (58) that is coincident with a centerline axis of mixer (50). Several ridges (68) are...
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6578355 |
Bloom mixer for a turbofan engine
The invention relates to lobe-type mixer tube for a bypass jet engine in which a bypass flow delivered by a fan is mixed with a hot gas stream issuing from the core engine, said lobe-type mixer...
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6571549 |
Jet noise suppressor
A jet noise suppressor is disclosed. The jet noise suppressor includes first and second high frequency pulse injection units located exteriorly of the turbine engine exhaust nozzle. The pulse...
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6427801 |
Apparatus for reducing noise in the jet engine
A apparatus and method for augmenting the thrust of a jet engine while reducing the noise generated thereby, including extending the thrust reverser sleeve, exposing the cascades while retaining...
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6360528 |
Chevron exhaust nozzle for a gas turbine engine
A gas turbine engine exhaust nozzle includes an exhaust duct for channeling a gas jet. A plurality of adjoining chevrons are disposed at an aft end of the duct to define an exhaust outlet. Each of...
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6273772 |
Apparatus and method for multi-conduit waterlift engine silencing
A waterlift silencer and method for reducing the acoustic energy of a fluid mixture of engine exhaust gas and a liquid coolant and limiting back pressure exerted by the silencer on an engine,...
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6253540 |
Removable baffle infrared suppressor
An infrared suppressor system for a gas turbine engine is provided for suppressing infrared radiation associated with the hot metal parts of the engine and with the hot exhaust gases exhausted from...
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6092621 |
Methods and apparatus for suppressing engine test cell howl
Methods and apparatus for suppressing cell howl with negligible impact on engine test conditions are described. The apparatus, in an exemplary embodiment includes a flow distorter configured to be...
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5943856 |
Turbofan engine with reduced noise
A noise reduction kit for modifying a two (2) spool axial flow turbofan engine with multi-stage compressors and fan driven by multi-stage reaction turbines, and a thrust of at least about 18,000...
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5884843 |
Engine noise suppression ejector nozzle
A moderately high bypass ratio turbofan engine nozzle (36) is provided including an outer structure (46) and one or more ejectors (38). The ejectors (38) include inner and outer doors (82), (80)...
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5758488 |
Core flow expansion chamber device system for reduction of jet turbine engine noise
A noise reduction system is provided for installation on a bypass turbine having a core engine, an outer casing and a thrust reverser. The system is comprised of an acoustically treated nose cowl...
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5721402 |
Noise suppression system for a jet engine
A noise suppression system for a jet engine, the system having a substrate formed of open cell material, a layer of microporous material covering at least a portion of one surface of the substrate,...
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5638675 |
Double lobed mixer with major and minor lobes
A lobed mixer has major and minor lobes. The major lobes increase in both height and width in the downstream axial direction. Each major lobe has two minor lobes positioned on its radially outer...
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