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On numerical prediction of the acoustic source characteristics of an engine exhaust system

Gupta, VH and Munjal, ML (1992) On numerical prediction of the acoustic source characteristics of an engine exhaust system. In: Journal of the Acoustical Society of America, 92 (5). pp. 2716-2725.

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The contemporary methods for source characterization rely mainly on experiments. These methods produce inaccurate results in the low‐frequency band, where the characteristics are all the more important. Moreover, the experimental methods cannot be used at the design stage. Hence, a numerical technique to obtain the source characteristics is desirable. In this paper, the pressure‐time history and the mass‐flux‐time history obtained by means of the time‐domain analysis have been used, along with the two‐load method to compute the source characteristics. Two new computational methods for obtaining the source characteristics have been described. These are much simpler, and computationally more economical than the complete time‐domain simulation, which makes use of the method of characteristics.

Item Type: Journal Article
Publication: Journal of the Acoustical Society of America
Publisher: American Institute of Physics
Additional Information: Copyright of this article belongs to American Institute of Physics.
Department/Centre: Division of Mechanical Sciences > Mechanical Engineering
Date Deposited: 16 Dec 2011 06:15
Last Modified: 16 Dec 2011 06:15
URI: http://eprints.iisc.ac.in/id/eprint/42763

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