2016
DOI: 10.1177/1475472x16630851
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Artificial noise systems for parametric studies of turbo-machinery aero-acoustics

Abstract: The study of turbo-machinery aero-acoustics encompasses source generation, duct propagation, and radiation to the far field for the purposes of physical understanding, evaluation, and noise reduction. Further, the acoustics subset can be divided into overall, broadband, or tone emphasis. Ultimately, assessments on full-scale turbofans are required. However, for isolating specific effects, or for costs reasons, it is useful to test models. These models may be scaled versions of turbofan components depending on … Show more

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Cited by 8 publications
(4 citation statements)
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“…The device was previously used to study noise shielding due to airframe or wing configurations [4] [5], and the use for supersonic inlet acoustics is a new application. Fan noise simulators can be a very useful alternative to rotating machinery for detailed noise studies [6]. Compared to computational methods, experiments may lend themselves to larger domain sizes or higher frequencies that may take a large amount of finite element grid nodes, such as shielding studies.…”
Section: Methodsmentioning
confidence: 99%
“…The device was previously used to study noise shielding due to airframe or wing configurations [4] [5], and the use for supersonic inlet acoustics is a new application. Fan noise simulators can be a very useful alternative to rotating machinery for detailed noise studies [6]. Compared to computational methods, experiments may lend themselves to larger domain sizes or higher frequencies that may take a large amount of finite element grid nodes, such as shielding studies.…”
Section: Methodsmentioning
confidence: 99%
“…A Configurable Fan Artificial Noise System (CFANS) 19 integrated into the ANCF was developed and utilized to generate and control circumferential modes (m) and to generate radial modes (n) for the purpose of providing an even wider distribution of acoustic sources to evaluate modal propagation and for assessing the efficacy of noise reduction technologies. The system consists of four axially distributed rows, each with 16 circumferentially distributed sets of electromagnetic drivers flush mounted on the inner wall.…”
Section: Configurable Fan Artificial Noise System Derivativementioning
confidence: 99%
“…The Configurable Fan Artificial Noise Source (CFANS) 39 -a unique ANCF featurewas utilized to generate and control circumferential modes and to generate radial modes to provide an even wider distribution of acoustic sources for the assessment of the efficacy of liner concepts.…”
Section: Investigation On Low-speed Fanmentioning
confidence: 99%