Heavy duty gas turbine inlet system

A silencer apparatus for an inlet system of a gas turbine including an Inlet Bleed Heat, the silencer apparatus comprising:

• a first plurality of sound-absorbing splitters which are disposed in parallel along a gas flow direction in the gas turbine inlet ducting, and
• a second plurality of sound-absorbing splitters which are disposed in parallel along the gas flow direction in the gas turbine inlet ducting,
• the turbine Inlet Bleed Heat being located between the first and second pluralities of splitters, and
• the second plurality of splitters being positioned with respect to the first plurality of splitters so that the first and second pluralities of splitters are staggered with respect to one other along the gas flow direction in the gas turbine inlet ducting so as to thereby block a direct line of travel for noise in the form of acoustical waves from the compressor and/or turbine travelling opposite the gas flow direction in the gas turbine inlet ducting.

A silencer apparatus for a gas turbine inlet system comprising:

• a main silencer comprised of a first plurality of sound-absorbing splitters which are disposed in parallel along the gas flow direction in the gas turbine inlet ducting, and
• a pre-silencer comprised of a second plurality of sound-absorbing splitters which are disposed in parallel along the gas flow direction in the gas turbine inlet ducting,
• leading edges of the second plurality of splitters being located a predetermined distance behind trailing edges of the first plurality of splitters, the predetermined distance being measured along the gas flow direction in the gas turbine inlet ducting,
• turbine Inlet Bleed Heat being located between the main silencer and the pre-silencer or the first and second pluralities of splitters,
• the second plurality of splitters being positioned with respect to the first plurality of splitters so that the first and second pluralities of splitters are staggered with respect to one other along the gas flow direction in the gas turbine inlet ducting so as to thereby block a direct line of travel for noise in the form of acoustical waves from the compressor and/or turbine travelling opposite the gas flow direction in the gas turbine inlet ducting,
• each of the first and second pluralities of splitters being made of a steel frame covered by steel perforated plates that contain sound absorption materials.