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http://dx.doi.org/10.3795/KSME-B.2014.38.5.423

Effect of the Inner Material and Pipe Geometry on the Flow and Induced Radiated Noise  

Lee, Su-Jeong (School of Mechanical Engineering, Pusan Nat'l Univ.)
Lim, Hee-Chang (School of Mechanical Engineering, Pusan Nat'l Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.38, no.5, 2014 , pp. 423-430 More about this Journal
Abstract
Noise and vibration, which occur in a pipe, are usually caused by the interaction between the turbulent flow and nearby wall. Although it can be estimated by a simple case of expanded pipes having complex turbulent flow, the radiated noise is highly dependent upon the size, shape, and thickness of the given model. In addition, the radiated noise propagates and has serious interference and destabilization effects on the surrounding systems, which can lead to fatigue fracture and failure. This study took advantage of the variety of commercial programs, such as FLUENT (flow solver), NASTRAN (dynamic motion solver of complex structures) and VIRTUAL LAB (radiated noise solver) based on the boundary element method (BEM), to understand the underlying physics of flow noise. The expanded pipe has separation and a high pressure drop because of the abrupt change in the cross-section. Based on the radiated noise calculations, the noise level was reduced to around 20 dB in the range of 100-500 Hz.
Keywords
Pulsating Flow; Pressure Drop; Radiated Noise; Fluid-Structure Interaction; FFT;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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