Analysis of Vaneless Diffuser Stall Instability in a Centrifugal Compressor
Numerical simulations based on the large eddy simulation approach were conducted with the aim to explore vaneless diffuser rotating stall instability in a centrifugal compressor. The effect of the impeller blade passage was included as an inlet boundary condition with sufficiently low flow angle rel...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2017-11-01
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| Series: | International Journal of Turbomachinery, Propulsion and Power |
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| Online Access: | https://www.mdpi.com/2504-186X/2/4/19 |
| _version_ | 1811324681641263104 |
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| author | Elias Sundström Mihai Mihăescu Marco Giachi Elisabetta Belardini Vittorio Michelassi |
| author_facet | Elias Sundström Mihai Mihăescu Marco Giachi Elisabetta Belardini Vittorio Michelassi |
| author_sort | Elias Sundström |
| collection | DOAJ |
| description | Numerical simulations based on the large eddy simulation approach were conducted with the aim to explore vaneless diffuser rotating stall instability in a centrifugal compressor. The effect of the impeller blade passage was included as an inlet boundary condition with sufficiently low flow angle relative to the tangent to provoke the instability and cause circulation in the diffuser core flow. Flow quantities, velocity and pressure, were extracted to accumulate statistics for calculating mean velocity and mean Reynolds stresses in the wall-to-wall direction. The paper focuses on the assessment of the complex response of the system to the velocity perturbations imposed, the resulting pressure gradient and flow curvature effects. |
| first_indexed | 2024-04-13T14:19:51Z |
| format | Article |
| id | doaj.art-7baf911dcbee4d6586e6b6dceb2acf8c |
| institution | Directory Open Access Journal |
| issn | 2504-186X |
| language | English |
| last_indexed | 2024-04-13T14:19:51Z |
| publishDate | 2017-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | International Journal of Turbomachinery, Propulsion and Power |
| spelling | doaj.art-7baf911dcbee4d6586e6b6dceb2acf8c2022-12-22T02:43:32ZengMDPI AGInternational Journal of Turbomachinery, Propulsion and Power2504-186X2017-11-01241910.3390/ijtpp2040019ijtpp2040019Analysis of Vaneless Diffuser Stall Instability in a Centrifugal CompressorElias Sundström0Mihai Mihăescu1Marco Giachi2Elisabetta Belardini3Vittorio Michelassi4Royal Institute of Technology (KTH), Department of Mechanics, Competence Center for Gas Exchange (CCGEx), Osquars backe 18, SE-10044 Stockholm, SwedenRoyal Institute of Technology (KTH), Department of Mechanics, Competence Center for Gas Exchange (CCGEx), Osquars backe 18, SE-10044 Stockholm, SwedenBaker Hughes, a GE company, 50127 Florence, ItalyBaker Hughes, a GE company, 50127 Florence, ItalyBaker Hughes, a GE company, 50127 Florence, ItalyNumerical simulations based on the large eddy simulation approach were conducted with the aim to explore vaneless diffuser rotating stall instability in a centrifugal compressor. The effect of the impeller blade passage was included as an inlet boundary condition with sufficiently low flow angle relative to the tangent to provoke the instability and cause circulation in the diffuser core flow. Flow quantities, velocity and pressure, were extracted to accumulate statistics for calculating mean velocity and mean Reynolds stresses in the wall-to-wall direction. The paper focuses on the assessment of the complex response of the system to the velocity perturbations imposed, the resulting pressure gradient and flow curvature effects.https://www.mdpi.com/2504-186X/2/4/19diffuser stallcentrifugal compressorLarge Eddy Simulations |
| spellingShingle | Elias Sundström Mihai Mihăescu Marco Giachi Elisabetta Belardini Vittorio Michelassi Analysis of Vaneless Diffuser Stall Instability in a Centrifugal Compressor International Journal of Turbomachinery, Propulsion and Power diffuser stall centrifugal compressor Large Eddy Simulations |
| title | Analysis of Vaneless Diffuser Stall Instability in a Centrifugal Compressor |
| title_full | Analysis of Vaneless Diffuser Stall Instability in a Centrifugal Compressor |
| title_fullStr | Analysis of Vaneless Diffuser Stall Instability in a Centrifugal Compressor |
| title_full_unstemmed | Analysis of Vaneless Diffuser Stall Instability in a Centrifugal Compressor |
| title_short | Analysis of Vaneless Diffuser Stall Instability in a Centrifugal Compressor |
| title_sort | analysis of vaneless diffuser stall instability in a centrifugal compressor |
| topic | diffuser stall centrifugal compressor Large Eddy Simulations |
| url | https://www.mdpi.com/2504-186X/2/4/19 |
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