A systematic investigation was undertaken which was aimed at providing a reliable theoretical method for designing and optimizing mufflers for multicylinder internal combustion engine exhaust systems. The method, based on linearized models, was developed from measurements made in some typically noisy exhaust systems. The exhaust system was divided into a number of sections and the theoretical models for each section were established. The total performance was then obtained by combining the various models in sequence. To ensure that the most efficient use was made of the space allocated for the muffler, optimization techniques were employed which modified an initial muffler configuration, within dimensional constraints, until the desired attenuation was achieved if at all possible. The procedure was used to design an exhaust muffler for a six-cylinder two-stroke diesel engine which developed approximately 200 bhp. The predicted muffler attenuation was achieved. (Author)

Media Info

  • Features: Figures; References;
  • Pagination: p. 1048-105

Subject/Index Terms

Filing Info

  • Accession Number: 00261132
  • Record Type: Publication
  • Source Agency: American Institute of Aeronautics and Astronautics
  • Report/Paper Numbers: A71-38901 20-22
  • Files: TRIS
  • Created Date: Oct 22 1974 12:00AM