Browse Publications Technical Papers 2013-01-1880
2013-05-13

Computational Aero-Acoustics Simulation of Compressor Whoosh Noise in Automotive Turbochargers 2013-01-1880

The advent of Eco-Boost technology in gasoline engines creates new challenges that need to be addressed with innovative designs. One of them is flow induced noise caused by flow, entering the turbocharger, at off design operation. At certain vehicle operation conditions, the mass flow rate and pressure ratio are such that compressor wheel generates a broad band frequency noise caused by flow separation from blade surfaces, which is called ‘whoosh’ noise.
Flow bench and engine testing can be used to detect flow induced noise, but understanding the fundamental mechanisms of such noise generation is necessary for developing an effective design. This paper describes Computational Aero-Acoustic (CAA) analyses performed to study the effects of inlet condition on the whoosh noise. A 3D Computational Fluid Dynamics (CFD) simulation performed including the entire compressor wheel and volute. The wheel consisted of six main and six splitter blades.
Based on the CAE results, a Leading-Edge Step at the compressor inlet in conjunction with an Inlet Guide Vane (or swirl vane) (IGV) were proposed to lower whoosh noise. Effectiveness of such innovative design is demonstrated in experimental testing.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

Development of an Experimental Facility to Characterize Performance, Surge, and Acoustics in Turbochargers

2011-01-1644

View Details

TECHNICAL PAPER

Computational Aero-acoustics Simulation of Whistle Noise in An Automotive Air-Intake System

2005-01-2364

View Details

TECHNICAL PAPER

CFD Simulation of Pressure Drop in Line Pipe

2006-01-1443

View Details

X