Turbocharger Centrifugal Compressor Casing Treatment for Improved BPF Noise Using Computational Fluid Dynamics

Event
Noise and Vibration Conference & Exhibition
Authors Abstract
Content
The conventional ported shroud recirculation casing treatment elevates narrowband noise at blade pass frequency. A new ported shroud recirculating casing treatment was implemented in Ford’s 3.5L turbo gas engine as Noise Vibration and Harshness (NVH) counter measure to reduce whoosh (broadband flow noise) noise without elevating narrowband noise at blade pass frequency. The new ported shroud design incorporates holes between the main and secondary recirculating passage and a slight cross-sectional area reduction just upstream of the impeller. These design features reduce whoosh noise without elevating the first order and the sixth order tonal noise at blade pass frequency. The new ported shroud design decreases narrowband tonal noise sound pressure level by 3-6 dB in the low to mid flow region compared to the baseline design. Computational Fluid Dynamics (CFD) tools were used to develop this casing treatment design.
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DOI
https://doi.org/10.4271/2019-01-1484
Pages
12
Citation
Karim, A., Mckean, M., Dehner, R., Selamet, A. et al., "Turbocharger Centrifugal Compressor Casing Treatment for Improved BPF Noise Using Computational Fluid Dynamics," Advances and Current Practices in Mobility 1(4):1702-1713, 2019, https://doi.org/10.4271/2019-01-1484.
Additional Details
Publisher
Published
Jun 5, 2019
Product Code
2019-01-1484
Content Type
Journal Article
Language
English