Alstom Technology Limited

Ansaldo Energia Switzerland Ag

Ansaldo Energia IP UK Limited

Andreas Huber

Nicolas Noiray

Urs Benz

Bruno Schuermans

Mirko Ruben Bothien

Diane Lauffer

Adnan Eroglu

Jaan Hellat

Michael Thomas Maurer

Ewald Freitag

Felix Michael Reinert

Uwe Rüdel

Lothar Schneider

Adrian Glauser

Bruno Schürmans

The damper arrangement includes a plurality of interconnected volumes and a plurality of necks for connecting the damper to a combustion chamber at a plurality of contact points. The plurality of necks are connected to the plurality of volumes.

Simultaneous broadband damping at multiple locations in a combustion chamber

A combustion device () for a gas turbine includes portions () having an inner and an outer wall () with an interposed noise absorption plate () having a plurality of holes (). The combustion device () further has first passages () connecting zones between the inner wall () and the plate () to the inside of the combustion device () and second passages () for cooling the inner wall (). The portions () also have an inner layer () between the inner wall () and the plate () defining inner chambers (), each connected to at least a first passage (), and an outer layer () between the outer wall () and the plate () defining outer chambers () connected to the inner chambers () via the holes () of the plate ().

Combustion device for a gas turbine

A damping device for reducing pressure oscillations in a combustion system includes at least a portion provided with a first, outer wall, a second, inner wall, an intermediate plate interposed between the first wall and the second wall. This intermediate plate forms a spacer grid to define at least one chamber between said first wall and said second wall, first passages connecting each of said at least one chamber to the inner of the combustion system, and second passages connecting each of said at least one chamber to the outer of the combustion system. The second passages open at the same side of said chambers as the first passages, the second passages have a portion extending parallel to the inner wall. This parallel portion of said second passages is equipped with heat transfer enhancing means.

Near-wall roughness for damping devices reducing pressure oscillations in combustion systems

Combustion device for a gas turbine configured to suppress thermo-acoustical pulsations

A combustion device for a gas turbine includes an interior portion, an inner wall having a plurality of first passages and an outer wall having a plurality of second passages configured to cool the inner wall, each of the plurality of second passages having an outlet opening into a third passage. An intermediate layer is disposed between the inner wall and the outer wall and defines a plurality of chambers, each chamber forming a Helmholtz damper and being connected to the interior portion by at least one of the plurality of first passages and being connected to at least one of the plurality of second passages by at least one of the plurality of third passages.

Combustion device with a layered wall structure for a gas turbine

A damper arrangement () has a first Helmholtz damper () connected in series to a second Helmholtz damper (). The resonance frequency of the first Helmholtz damper () and the resonance frequency of the second Helmholtz damper () are shifted from one another in an amount producing a synergic damping effect.

Damper arrangement and method for designing same

A Helmholtz damper, including an enclosure, a neck extending from the enclosure, and a pipe for inserting into the neck. The portions of the pipe inserted into the neck is adjusted to regulate a resonance frequency of the Helmholtz damper.

Helmholtz damper and method for regulating the resonance frequency of a Helmholtz damper

An exemplary combustor includes at least a portion having an inner liner and an outer cover plate, which together form an interposed cooling chamber. A plurality of hollow elements extend from the liner and protrude into the cooling chamber. Each hollow element defines a damping volume connected to an inner volume of the combustion chamber via a calibrated duct. During operation, the hollow elements damp pressure pulsations and, in addition, also transfer heat.

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Baden, Switzerland

Andreas Huber