Large-Scale Acoustic Testing of Gas Turbine Silencer Components and Reciprocating Engine Silencers Using a Dynamic Insertion Loss and Attenuation Facility
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Media type:
E-Article
Title:
Large-Scale Acoustic Testing of Gas Turbine Silencer Components and Reciprocating Engine Silencers Using a Dynamic Insertion Loss and Attenuation Facility
Contributor:
Halter, E. J.
Published:
Acoustical Society of America (ASA), 1972
Published in:
The Journal of the Acoustical Society of America, 51 (1972) 1A_Supplement, Seite 143-143
Description:
Since late 1970, the Maxim Silencer Product Center has been testing full-scale gas turbine silencer components and large reciprocating engine silencers under simulated field conditions of flow and intense soundpressure level. A 73-in. centrifugal fan and Ling Electronics EPT-94B electro-pneumatic transducer are assembled in a duct system to provide more than 100 000 SCFM flow and more than 2000 acoustic watts of shaped acoustic noise as input to test silencers. Full-scale gas turbine splitter panels are tested in a 4-ft by 4-ft duct at input acoustic levels corresponding to the unsilenced exhaust noise of a more than 30-MW gas turbine and at flows varying from zero to more than 150 FPS. A shaped random noise electrical input to the EPT-94B noise source is used. A circular duct transition section is used to modify the basic system for tests of large reciprocating engine silencers. Sine sweep and shaped random noise electrical inputs to the noise source are used.