Numerical modelling of multiphase flow-induced noise and vibration in a poppet valve Online publication date: Sat, 05-Mar-2016
by Chenguang Li; Fue-Sang Lien; Eugene Yee; Mike Dong
International Journal of Vehicle Noise and Vibration (IJVNV), Vol. 11, No. 3/4, 2015
Abstract: A deeper understanding of the multiphase flow-induced noise and vibration in a dynamic valve is of critical importance to the automotive industry. A two-dimensional axis-symmetric Eulerian multiphase flow model that incorporates a fluid-structure interaction capability was used to facilitate the modelling of the complicated two-phase flow through the poppet valve. The validation results provide confirmation that the model developed in this study should provide credible predictions. A spectral analysis of the transient pressure force on the poppet revealed the presence of a strong cyclical behaviour consisting of two major components: a low-frequency peak located at about 87 Hz associated with the frequency of the poppet vibration is the source of the mechanical noise, and a high-frequency peak located from about 450 to 970 Hz associated with compressibility effects and the unsteady vortex motions is the source of the turbulence noise.
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