한국기계기술학회지 제24권 제5호 (p.849-855)

발포 알루미늄 흡음재를 이용한 배출 소음기에 대한 수치해석

Numerical Analysis of Vent Silencer using the Formed Aluminum Absorber
키워드 :
Formed aluminum(발포 알루미늄),Diffuser(디퓨저),Splitter(스플리터),Noise(소음),Porous media(다공성 매질),Vent silencer(배출 소음기),CFD(전산유체역학)

초록

In this study, the noise reduction effect of the steam vent silencer was investigated by performing a transient flow analysis applying the Loss Model, a porous flow analysis model, and calculating the noise intensity from the pressure fluctuation according to the time change. As a result of flow analysis, it was confirmed that the noise intensity decreased as the number of diffusers and the number of splitters made of foamed aluminum increased. In the case of three-stage diffusers, the noise intensity decreased by up to 33.4 dB when six foamed aluminum with a thickness of 150mm were installed.