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.
展开▼
