HEAVY DUTY GAS TURBINE INLET SYSTEM

A silencer apparatus for a gas turbine inlet system ducting is disclosed. The inlet ducting contains a main silencer 42 and a pre-silencer 45, and Inlet Bleed Heat ("IBH") 43 located between the silencers. The pre-silencer decreases the noise level from the turbine compressor and makes the air flow/temperature profiles more uniform. The main silencer reduces noise from the IBH and the remaining noise from the compressor to an appropriate level. The main silencer is comprised of a first plurality of sound-absorbing splitters disposed along the gas flow direction. The pre-silencer is comprised of a second plurality of sound-absorbing splitters disposed along the gas flow direction, but staggered with respect to the first plurality of splitters to thereby block a direct line of travel for noise acoustical waves from the compressor travelling opposite the gas flow direction in the inlet ducting.