Silencers Used in Compressors

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A compressor is a device designed to increase the pressure of a gas via the reduction of its volume. Silencers can be used in compressors to absorb air-intake noise generated during normal compressor system function.

Operation

  • A compressor silencer consists of cylindrical-shaped, fibrous packing materials installed in the compressor inlet, or area through which air enters the system. The silencer’s fibrous material controls compressor high frequency noise by absorbing noise energy.

Noise Absorption

  • After the compressor starts, sound waves pass through the holes between the tightly packed fibers of the silencer material, resulting in viscous drag, or the force that opposes the motion of an object through a fluid. This friction dissipates the sound energy, converting it into heat.

Air Flow

  • The tube shape of the silencer is designed to allow air to pass through it. This “straight-through” design allows optimal air flow without the need for restrictive silencer devices, such as baffles, or flow-directing veins or panels, to absorb compressor noise.

References

  • "A Practical Guide to Compressor Technology"; Heinz P. Bloch; 2006
  • Photo Credit tools image by Stelios Filippou from Fotolia.com
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Resources

  • "Compressor Handbook"; Paul Hanlon; 2001

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