Development of a reactive silencer for turbocompressors
conference paper
Turbo compressors can generate tonal noise in a frequency range of 1000 to 5000 Hz, which may cause nuisance in the environment where the machine is installed. The cause of this tonal noise is the interaction between the flow and the rotating blades inside the compressor. The noise is transmitted from the compressor into the pipe system at both suction and discharge sides. Then it is radiated from the pipe walls to the environment. As this noise source can’t be avoided, if necessary a silencer can be installed between the compressor and the pipe system. The silencer blocks the transmission of the noise. The most common type of silencer for this application is the so-called absorption type. However, due to high flow velocities and vibrations, the absorption material may deteriorate and be blown away. A sturdier silencer type has been developed based on rigid acoustic resonators. In this paper the development process is described. This includes one and three dimensional acoustic modeling, scale model tests and the design for a full scale application. Compared to the absorption type silencer, the final silencer design has similar or lower pressure loss and fits in the same containment.
TNO Identifier
520537
Source title
Proceedings 2013 COMSOL Conference, 23-25 October 2013, Rotterdam, Netherlands
Collation
10 p.