Correlation of Simulated and Measured Noise Emissions and Unsteady Gas Dynamic Flow from Engine Ducting 961806
One-dimensional (1-D) unsteady gas dynamic models of a number of common muffler (or silencer) elements have been incorporated into a1-D simulation code to predict the impact of the muffler on the gas dynamics within the overall system and the radiated Sound Pressure Level (SPL) noise spectrum in free-space.
Correlation with measured data has been achieved using a Single-Pulse rig for detailed unsteady gas dynamic analysis and a Rotary-Valve rig in conjunction with an anechoic chamber for noise spectra analysis. The results obtained show good agreement both gas dynamically and acoustically. The incorporation of these models into a full 1-D engine simulation code should facilitate the rapid assessment of various muffler designs prior to prototype manufacture and testing.
Citation: Mackey, D., Blair, G., and Fleck, R., "Correlation of Simulated and Measured Noise Emissions and Unsteady Gas Dynamic Flow from Engine Ducting," SAE Technical Paper 961806, 1996, https://doi.org/10.4271/961806. Download Citation
D. O. Mackey, G. P. Blair, R. Fleck
The Queen's University of Belfast
1996 SAE International Off-Highway and Powerplant Congress and Exposition
Design, Modeling, and Emission Control for Small Two- and Four-Stroke Engines-SP-1195, Two-Stroke Engines-PT-69, SAE 1996 Transactions - Journal of Engines-V105-3