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격자볼츠만기법을 이용한 전동차용 견인전동기 공력소음 저감 설계
김준형(J.H. Kim),기호철(H.C. Ki),변성준(S.J. Byun),노주현(J.H. Rho) 한국전산유체공학회 2017 한국전산유체공학회지 Vol.22 No.1
The aerodynamic noise reduction of railway traction motor is required to satisfy new enhanced Korean noise regulations for a train. This paper is the study result on a noise reduction of a railway traction motor using Lattice Boltzmann Method(LBM). To verify the reliability of numerical analysis, the noise performance of the base model evaluated using LBM, and calculated result was compared with the experimental data. In addition, main noise sources were selected to design parameters through analyzing the flow field of the base model. Based on the noise sources analysis result, a design improvement model of traction motor for this study was derived to reduce the noise. The performance of a design improvement model was evaluated by applying a validated numerical scheme. As a result, it was confirmed that the noise was reduced due to the suppression of the internal turbulent flow components.