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Influence of Reynolds Number Variation Method on Centrifugal Compressor Loss Generation


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Publication Details

Authors: Tiainen Jonna, Jaatinen-Värri Ahti, Grönman Aki, Backman Jari

Publication year: 2017

Language: English

Related journal or series: Proceedings of the European Turbomachinery Conference

Title of parent publication: Proceedings of 12th European Conference on Turbomachinery Fluid dynamics & Thermodynamics, ETC12

Journal acronym: ETC

ISSN: 2313-0067

eISSN: 2410-4833

JUFO level of this publication: 1

Permanent website address: http://www.euroturbo.eu/paper/ETC2017-041.pdf

Open Access: Open Access publication


Abstract

Decreasing Reynolds number increases frictional losses in kinetic compressors, resulting in deteriorated performance. Reynolds number can be varied by changing either compressor size or compressor inlet conditions. In this study, the effect of decreasing Reynolds number on compressor performance is numerically investigated in centrifugal compressors. First, the Reynolds number is varied by scaling the compressor while keeping the inlet conditions constant and after this by keeping the dimensions constant and varying
the inlet conditions. The fractions of different loss generation mechanisms at different Reynolds numbers are estimated and loss generation mechanisms are compared. The results can be utilized to improve performance of low Reynolds number compressors, e.g. in micro-scale gas turbines or unmanned aerial vehicles.


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Last updated on 2018-19-10 at 07:55