Abstract
Abstract
This paper presents fire-fighting design of silencer formed by stepped partitions. Providing the distance between the partitions not exceeding a quarter of the wavelengths and forming the set of ducts with alternating expansions and narrowings create the possibilities for noise reduction and spark arresting. Slit silencer model testing on the stand contained doubled reverberant chambers with removable elements and diaphragm as well as on the stand with internal combustion chamber demonstrates the following: noise reduction is not less than 7.5 dB in a wide frequency range; pressure losses are not more than 120 Pa; sparks don’t pass. Correcting the silencer geometry allows forming the devices which acoustic and aerodynamic characteristics are similar to the characteristics of standard plate silencers. Calculating data show the dimensions of single and double silencer, ensuring spark arresting and requirement noise reduction in a gas flue.