Experimental investigation of transmission loss in an automotive turbocharger compressor under ideal and real engine operating conditions

Yasser El Nemr; Rafael Veloso; Josef Girstmair; Raimo Kabral; Mats Åbom; Eberhard Schutting; Ortwin Dumböck; Carlos Ludwig; Robert Mirlach; Panagiotis Koutsovasilis; A. Masrane

doi:10.29008/ETC2017-298

12^th European Conference on Turbomachinery Fluid dynamics & Thermodynamics

Paper ID:

ETC2017-298

Main Topic:

Experimental Technique

https://doi.org/10.29008/ETC2017-298

Authors

Yasser El Nemr - Virtual Vehicle, Graz Austria,
Rafael Veloso - Virtual Vehicle, Graz Austria,
Josef Girstmair - Virtual Vehicle, Graz Austria,
Raimo Kabral - KTH-CCGEx, Stockholm, Sweden
Mats Åbom - KTH-CCGEx, Stockholm, Sweden
Eberhard Schutting - IVT, TU, Graz, Austria
Ortwin Dumböck - IVT, TU, Graz, Austria
Carlos Ludwig - BMW, Munich, Germany
Robert Mirlach - BMW, Munich, Germany
Panagiotis Koutsovasilis - BorgWarner, Kirchheimbolanden, Germany
A. Masrane - BorgWarner, Kirchheimbolanden, Germany

Abstract

Acoustic transmission losses are expected to occur over the turbocharger compressor, especially along its rotating wheel section. Experiments on the acoustic characteristics of automotive turbocharger compressors were performed to investigate this acoustic transmission loss behavior. Two different rotor sizes were acoustically investigated considering approximately the same performance characteristics of the compressors. The investigated variants passed through two phases of measurements: The first phase was performed under ideal operating conditions involving a steady non-pulsating flow on an acoustic component test rig for turbochargers. Whereas the second phase was conducted under real engine operating conditions including pulsating flow of a modern 6-cylinder gasoline engine on an engine test rig. Comparisons between the two measurement phases show a considerable agreement between the two test rig setups for different operating conditions.