Patent ID: 6537490
Filing Date: 2003-03-25
Classification: F01D,F02C,F04D,F05D

Abstract:
An air duct inlet silencing apparatus for use with a stationary gas turbine, said silencing apparatus comprising:an inlet duct structure extending around a vertical first axis and extending vertically along said first axis, said duct structure having an upper duct section with a plurality of vertically extending sides and a top cover, an inlet opening being formed in at least two of said vertically extending sides and an air outlet being formed at a bottom end of said structure, said outlet being adapted for connection to an air intake of said gas turbine; an elongate centrally located, airflow defining member which extends around a vertical primary axis and extends downwardly from said top cover, past said air inlet openings, and along said primary axis, said airflow defining member being formed with a perforated sheet metal exterior and containing sound attenuating material; airflow passageways extending from said air inlet openings towards said air outlet and each defined by at least one interior wall mounted in said duct structure, each airflow passageway bending substantially so that a bottom section thereof extends substantially parallel to said vertical first axis, wherein a substantial portion of said at least one interior wall is made of perforated sheet metal and sound attenuating material is contained in said at least one interior wall and is covered by said perforated sheet metal.