|Authors: || D. O. Mackey, G. P. Blair, R. Fleck |
|Title: ||Correlation of Simulated and Measured Noise Using a Combined 1D/3D Technique|
|Date: || February 26 - 28, 1997 |
|Published:|| SAE International Congress - Detroit, Michigan - SAE 970801 |
A combined one-dimensional, multi-dimensional computational fluid dynamic modeling technique has been
developed for analysis of unsteady gas dynamic flow through automotive mufflers. The technique facilitates
assessment of complex designs in terms of back-pressure and noise attenuation. The methodology has been
validated on a number of common exhaust muffler arrangements over a wide range of test conditions.
Comparison between measured and simulated data has been conducted on a Single-Pulse (SP) rig for detailed
unsteady gas dynamic analysis and a Rotary-Valve (RV) rig in conjunction with an anechoic chamber for noise
attenuation analysis. Results obtained on both experimental arrangements exhibit excellent gas dynamic and
acoustic correlation. The technique should allow optimization of a wide variety of muffler designs prior to
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