Optimal Design of Helmholtz Muffler for Air Compressor

Abstract

Helmholtz muffler is widely used because of its simple structure and good noise elimination effect. In this paper, the method of installing Helmholtz muffler at the outlet of air compressor is adopted to reduce the influence of outlet pressure fluctuation noise on the pipeline system. The optimal relationship between the number of cylinders n and the installation parameter L is obtained when using standard high pressure cylinders as Helmholtz silencers. By calculating the transmission loss TL of Helmholtz mufflers under different number of standard high pressure cylinders, the results show that Helmholtz muffler has the best muffling effect at 16.17Hz, the transmission loss TL reach to 65dB, and has obvious filtering effect on low-frequency noise. At the same time, with the increase of the number of cylinders, which means that the larger the volume of Helmholtz muffler, the better the noise reduction effect.