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Stall development in a ported shroud compressor using PIV measurements and Large Eddy Simulation
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2010 (English)In: SAE Technical Papers, 2010Conference paper, Published paper (Refereed)
Abstract [en]

Surge is a phenomenon that limits the operational range of the compressor at low mass flow rates. The objective of this research is to study effective operational range for a ported shroud compressor. The size of the compressor is typical for a turbocharger used on diesel engines. To be able to extend the operational range, the surge characteristics have to be assessed. This is done by performing measurement of the flow at the inlet to the compressor wheel and pressure fluctuations at the inlet and outlet of the compressor housing. Detailed numerical computations of the flow in the entire compressor section under similar operating conditions have also been carried out. The experimental work includes Particle Imaging Velocimetry (PIV) measurements of the instantaneous and mean velocity field at the inlet. At surge, low frequency pulsations are detected that seem to result from back flow already observed in stall. The numerical computations include details of the flow by having good spatial and temporal resolution and using Large Eddy Simulations (LES) to account for the turbulence. LES is most suitable for the surge flow since it resolves the large scale structures, such as flow separation and reversed flow, which characterize surge.

Place, publisher, year, edition, pages
2010.
Series
SAE Technical Papers, ISSN 0148-7191
Keyword [en]
Back flow, Flow byes, Large scale structures, Low mass, Low-frequency pulsations, Mean velocities, Numerical computations, Operating condition, Operational range, Particle imaging velocimetry, PIV measurements, Pressure fluctuation, Reversed flow, Temporal resolution, Compressors, Diesel engines, Flow rate, Large eddy simulation, Inlet flow
National Category
Applied Mechanics
Identifiers
URN: urn:nbn:se:kth:diva-148849DOI: 10.4271/2010-01-0184Scopus ID: 2-s2.0-84877244190OAI: oai:DiVA.org:kth-148849DiVA: diva2:738957
Conference
SAE 2010 World Congress and Exhibition; Detroit, MI; United States; 13 April 2010 through 13 April 2010
Note

QC 20140819

Available from: 2014-08-19 Created: 2014-08-14 Last updated: 2014-08-19Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
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  • de-DE
  • en-GB
  • en-US
  • fi-FI
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  • nn-NB
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  • Other locale
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Output format
  • html
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  • asciidoc
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