Abstract
As the designers of modern automotive turbochargers strive to increase map width and lower the mass flow rate at which compressor surge occurs, the recirculating flows at the impeller inlet are becoming a much more relevant aerodynamic feature. Compressors with relatively large map widths tend to have very large recirculating regions at the inlet when operating close to surge; these regions greatly affect the expected performance of the compressor.
This study analyses the inlet recirculation region numerically using several modern automotive turbocharger centrifugal compressors. Using 3D Computational Fluid Dynamics (CFD) and a single passage model, the point at which the recirculating flow begins to develop and the rate at which it grows are investigated. All numerical modelling has been validated using measurements taken from hot gas stand tests for all compressor stages. The paper improves upon an existing correlation between the rate of development of the recirculating region and the compressor stage, which is supported by results from the numerical analysis.
This study analyses the inlet recirculation region numerically using several modern automotive turbocharger centrifugal compressors. Using 3D Computational Fluid Dynamics (CFD) and a single passage model, the point at which the recirculating flow begins to develop and the rate at which it grows are investigated. All numerical modelling has been validated using measurements taken from hot gas stand tests for all compressor stages. The paper improves upon an existing correlation between the rate of development of the recirculating region and the compressor stage, which is supported by results from the numerical analysis.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the 11th International Conference on Turbochargers and Turbocharging |
| Publisher | Woodhead Publishing |
| Pages | 89-100 |
| Number of pages | 12 |
| ISBN (Print) | 978-0-08-100033-5 |
| DOIs | |
| Publication status | Published - 23 Sep 2014 |
| Event | 11th International Conference on Turbochargers and Turbocharging - London, United Kingdom Duration: 13 May 2014 → 14 May 2014 |
Conference
| Conference | 11th International Conference on Turbochargers and Turbocharging |
|---|---|
| Country | United Kingdom |
| City | London |
| Period | 13/05/2014 → 14/05/2014 |
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Cite this
Harley, P. X. L., Spence, S. W. T., Early, J., Filsinger, D., & Dietrich, M. (2014). Inlet recirculation in automotive turbocharger centrifugal compressors. In Proceedings of the 11th International Conference on Turbochargers and Turbocharging (pp. 89-100). Woodhead Publishing. https://doi.org/10.1533/978081000342.89