ON NUMERICAL PREDICTION OF THE ACOUSTIC SOURCE CHARACTERISTICS OF AN ENGINE EXHAUST SYSTEM

被引：25
|
作者：
GUPTA, VH
MUNJAL, ML
机构：
[1] Department of Mechanical Engineering, Indian Institute of Science
来源：
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA | 1992年 / 92卷 / 05期
关键词：
D O I：
10.1121/1.404388
中图分类号：
O42 [声学];
学科分类号：
070206 ; 082403 ;
摘要：
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.
引用
收藏
页码：2716 / 2725
页数：10
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