Flow Measurements in Two Cambered Vane Diffusers with Different Passage Widths

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Stein, W.; Rautenberg, M.: Flow Measurements in Two Cambered Vane Diffusers with Different Passage Widths. In: International Journal of Turbo and Jet Engines 4 (1987), S. 131-138. DOI: https://doi.org/10.1515/TJJ.1987.4.1-2.131

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To cite the version in the repository, please use this identifier: https://doi.org/10.15488/3606

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Sum total of downloads: 15




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Abstract: 
To investigate the influence of the vaneless space between impeller exit and the diffuser vanes, detailed flow measurements in two diffusers with the same vane geometry but different passage width are compared. The three—dimensional character of the flow changes between impeller exit and the entry to the two dimensional vanes depending on the shape of the shroud. After initial measurements with a constant area vaneless space, the width of the vaned diffuser was later on reduced by 10%. The compressor maps show an increase in overall pressure rise and efficiency with the width reduction. To get further details of the flow field, measurements of the static pressure distribution at hub and shroud have been performed at several operation points for both diffusers. At the same points the flow angle and total pressure distribution between hub and shroud upstream and downstream of the vanes have been measured with probes. The maximum efficiency of the narrow diffuser is nearly 2% higher than for the wide diffuser. The measurements give further details to explain these improvements. © Freund Publishing House Ltd.
License of this version: Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden. Dieser Beitrag ist aufgrund einer (DFG-geförderten) Allianz- bzw. Nationallizenz frei zugänglich.
Document Type: article
Publishing status: publishedVersion
Issue Date: 1987
Appears in Collections:Fakultät für Maschinenbau

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1 image of flag of Germany Germany 13 86.67%
2 image of flag of South Africa South Africa 1 6.67%
3 image of flag of Korea, Republic of Korea, Republic of 1 6.67%

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