1996-02-01

Simultaneous Prediction of Pressure Losses and Acoustic Characteristics in Silencers by Numerical Simulation 960637

A practical method has been developed for numerically predicting pressure losses and acoustic characteristics in silencers simultaneously under the quasi-operating conditions of internal combustion engines. In the present method, three-dimensional gas flow and pressure dynamics in silencers have been numerically simulated by means of a new three-dimensional non-linear fluid-dynamic model, where the gas exchange process in entire intake and exhaust systems has been calculated by a one-dimensional non-linear fluid-dynamic model for saying the computing time. In this three-dimensional fluid-dynamic model, an accurate numerical scheme with less numerical diffusion has been applied to the Reynolds average Navier-Stokes equations using an eddy-viscosity hypothesis. Pressure losses and insertion losses in silencers have been examined using the three-dimensional model. It has been shown that the present method can predict the pressure losses and acoustic characteristics simultaneously.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 43% off list price.
Login to see discount.
Special Offer: With TechSelect, you decide what SAE Technical Papers you need, when you need them, and how much you want to pay.
X