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http://dx.doi.org/10.7776/ASK.2022.41.6.698

A quantitative analysis of aerodynamic noise by sound sources from a nozzle inflow  

Kwongi, Lee (부산대학교 기계공학부)
Cheolung, Cheong (부산대학교 기계공학부)
Kyeonghun, Park (LG전자)
Publication Information
The Journal of the Acoustical Society of Korea / v.41, no.6, 2022 , pp. 698-704 More about this Journal
Abstract
In this paper, the radiated aerodynamic noise generated from sound sources of a nozzle inflow is quantitatively investigated and compared with experimental results of externally radiated noise. A high-resolution unsteady compressible Large Eddy Simulation (LES) technique is used to accurately predict the internal and external flow of three types of nozzle shape. Through using the vortex sound source for sound sources, the geometry of nozzle neck is identified as most significant aerodynamic noise sources. For validation of quantitative analysis, the vortex sound source intensity of internal nozzle flow is compared with results of external radiated noise of calculation and experiment.
Keywords
Sound source of nozzle internal flow; External radiated noise; Vortex sound source; Large Eddy Simulation (LES);
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