배기가스 압력변동을 고려한 소음기내 3차원 유동해석

A 3-dimensional flow analysis in a muffler considering pulsating pressure of exhaust gas has been conducted to provide a pressure data for noise reduction. The CFD analysis of a unit area of porous materials also conducted for determining the permeability of perforated inlet pipe and baffle plates. The pulsating velocity of exhaust gas was assumed for three case conditions. The STAR-CD S/W used for the three dimensional unsteady state CFD analysis in a muffler. The pulsating pressure amplitude was decreased in an outlet pipe of muffler. About 80% pressure drop was obtained between inlet pipe and out pipe. For a practical application, temperature calculation in a muffler has to conducts.