EXHAUST SYSTEM SILENCING

Recent research at the ISVR has shown that, provided the effects of mean flow are included, the acoustic behavior of expansion chamber silencers can be represented by mathematical models and that such performance predictions are sufficiently accurate for design purposes and can be carried out on a computer. Alternative approaches are also available. For fixed speed running silencer characteristics can be matched to attenuate major noise components in the exhaust providing a minimum silencer volume. Alternatively, the computer programme contains optimisation procedures so that the best compromise design for a range of operating range. A comparison is presented between the predicted and the measured performance for a number of installations.

• Supplemental Notes:
  • 45 Conference Papers presented at IMAS 73, London, 4-8 June 1973, organized by the Institute of Marine Engineers. This paper is available only in a set of 7 papers in Subject Group 4: "Marine Pollution: Sewage, Oil, and Noise" at $10.00.
• Corporate Authors:

  Institute of Marine Engineers

  Memorial Building, 76 Mark Lane
  London EC3R 7JN,   England 
• Authors:
  • Davies, P
• Publication Date: 1973

Subject/Index Terms

• TRT Terms: Emission control systems; Engines; Exhaust gases; Noise; Noise control
• Uncontrolled Terms: Exhaust noise; Noise reduction; Signature analysis
• Old TRIS Terms: Engine noise
• Subject Areas: Environment; Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00048470
• Record Type: Publication
• Source Agency: Institute of Marine Engineers
• Files: TRIS
• Created Date: Nov 14 1973 12:00AM