Investigation of the Stage Performance and Flow Fields in a Centrifugal Compressor with a Vaneless Diffuser
The effect of the width of the vaneless diffuser on the stage performance and flow fields of a centrifugal compressor is studied numerically and experimentally. The diffuser width is varied by reducing the diffuser flow area from the shroud side (i.e., pinching the diffuser). Seven different diffuse...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2014-01-01
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| Series: | International Journal of Rotating Machinery |
| Online Access: | http://dx.doi.org/10.1155/2014/139153 |
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| _version_ | 1832567282666045440 |
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| author | Ahti Jaatinen-Värri Aki Grönman Teemu Turunen-Saaresti Jari Backman |
| author_facet | Ahti Jaatinen-Värri Aki Grönman Teemu Turunen-Saaresti Jari Backman |
| author_sort | Ahti Jaatinen-Värri |
| collection | DOAJ |
| description | The effect of the width of the vaneless diffuser on the stage performance and flow fields of a centrifugal compressor is studied numerically and experimentally. The diffuser width is varied by reducing the diffuser flow area from the shroud side (i.e., pinching the diffuser). Seven different diffuser widths are studied with numerical simulation. In the modeling, the diffuser width b/b2 is varied within the range 1.00 to 0.50. The numerical results are compared with results obtained in previous studies. In addition, two of the diffusers are further investigated with experimental measurement. The main finding of the work is that the pinch reduces losses in the impeller associated with the tip-clearance flow. Furthermore, it is shown that a too large width reduction causes the flow to accelerate excessively, resulting in a highly nonuniform flow field and flow separation near the shroud. |
| format | Article |
| id | doaj-art-0336d229629f49408664033c19e756e5 |
| institution | Kabale University |
| issn | 1023-621X 1542-3034 |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Rotating Machinery |
| spelling | doaj-art-0336d229629f49408664033c19e756e52025-02-03T01:01:49ZengWileyInternational Journal of Rotating Machinery1023-621X1542-30342014-01-01201410.1155/2014/139153139153Investigation of the Stage Performance and Flow Fields in a Centrifugal Compressor with a Vaneless DiffuserAhti Jaatinen-Värri0Aki Grönman1Teemu Turunen-Saaresti2Jari Backman3Institute of Energy, Lappeenranta University of Technology, P.O. Box 20, 53851 Lappeenranta, FinlandInstitute of Energy, Lappeenranta University of Technology, P.O. Box 20, 53851 Lappeenranta, FinlandInstitute of Energy, Lappeenranta University of Technology, P.O. Box 20, 53851 Lappeenranta, FinlandInstitute of Energy, Lappeenranta University of Technology, P.O. Box 20, 53851 Lappeenranta, FinlandThe effect of the width of the vaneless diffuser on the stage performance and flow fields of a centrifugal compressor is studied numerically and experimentally. The diffuser width is varied by reducing the diffuser flow area from the shroud side (i.e., pinching the diffuser). Seven different diffuser widths are studied with numerical simulation. In the modeling, the diffuser width b/b2 is varied within the range 1.00 to 0.50. The numerical results are compared with results obtained in previous studies. In addition, two of the diffusers are further investigated with experimental measurement. The main finding of the work is that the pinch reduces losses in the impeller associated with the tip-clearance flow. Furthermore, it is shown that a too large width reduction causes the flow to accelerate excessively, resulting in a highly nonuniform flow field and flow separation near the shroud.http://dx.doi.org/10.1155/2014/139153 |
| spellingShingle | Ahti Jaatinen-Värri Aki Grönman Teemu Turunen-Saaresti Jari Backman Investigation of the Stage Performance and Flow Fields in a Centrifugal Compressor with a Vaneless Diffuser International Journal of Rotating Machinery |
| title | Investigation of the Stage Performance and Flow Fields in a Centrifugal Compressor with a Vaneless Diffuser |
| title_full | Investigation of the Stage Performance and Flow Fields in a Centrifugal Compressor with a Vaneless Diffuser |
| title_fullStr | Investigation of the Stage Performance and Flow Fields in a Centrifugal Compressor with a Vaneless Diffuser |
| title_full_unstemmed | Investigation of the Stage Performance and Flow Fields in a Centrifugal Compressor with a Vaneless Diffuser |
| title_short | Investigation of the Stage Performance and Flow Fields in a Centrifugal Compressor with a Vaneless Diffuser |
| title_sort | investigation of the stage performance and flow fields in a centrifugal compressor with a vaneless diffuser |
| url | http://dx.doi.org/10.1155/2014/139153 |
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