Stall Margin Improvement in a Centrifugal Compressor through Inducer Casing Treatment
The increasing trend of high stage pressure ratio with increased aerodynamic loading has led to reduction in stable operating range of centrifugal compressors with stall and surge initiating at relatively higher mass flow rates. The casing treatment technique of stall control is found to be effectiv...
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| Format: | Article |
| Language: | English |
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Wiley
2016-01-01
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| Series: | International Journal of Rotating Machinery |
| Online Access: | http://dx.doi.org/10.1155/2016/2371524 |
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| author | V. V. N. K. Satish Koyyalamudi Quamber H. Nagpurwala |
| author_facet | V. V. N. K. Satish Koyyalamudi Quamber H. Nagpurwala |
| author_sort | V. V. N. K. Satish Koyyalamudi |
| collection | DOAJ |
| description | The increasing trend of high stage pressure ratio with increased aerodynamic loading has led to reduction in stable operating range of centrifugal compressors with stall and surge initiating at relatively higher mass flow rates. The casing treatment technique of stall control is found to be effective in axial compressors, but very limited research work is published on the application of this technique in centrifugal compressors. Present research was aimed to investigate the effect of casing treatment on the performance and stall margin of a high speed, 4 : 1 pressure ratio centrifugal compressor through numerical simulations using ANSYS CFX software. Three casing treatment configurations were developed and incorporated in the shroud over the inducer of the impeller. The predicted performance of baseline compressor (without casing treatment) was in good agreement with published experimental data. The compressor with different inducer casing treatment geometries showed varying levels of stall margin improvement, up to a maximum of 18%. While the peak efficiency of the compressor with casing treatment dropped by 0.8%–1% compared to the baseline compressor, the choke mass flow rate was improved by 9.5%, thus enhancing the total stable operating range. The inlet configuration of the casing treatment was found to play an important role in stall margin improvement. |
| format | Article |
| id | doaj-art-562c12972ce54899bdc571bd9c0bedbe |
| institution | Kabale University |
| issn | 1023-621X 1542-3034 |
| language | English |
| publishDate | 2016-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Rotating Machinery |
| spelling | doaj-art-562c12972ce54899bdc571bd9c0bedbe2025-08-20T03:26:27ZengWileyInternational Journal of Rotating Machinery1023-621X1542-30342016-01-01201610.1155/2016/23715242371524Stall Margin Improvement in a Centrifugal Compressor through Inducer Casing TreatmentV. V. N. K. Satish Koyyalamudi0Quamber H. Nagpurwala1MSR School of Advanced Studies, Bangalore 560058, IndiaDepartment of Automotive and Aeronautical Engineering, Faculty of Engineering and Technology, M. S. Ramaiah University of Applied Sciences, Bangalore 560058, IndiaThe increasing trend of high stage pressure ratio with increased aerodynamic loading has led to reduction in stable operating range of centrifugal compressors with stall and surge initiating at relatively higher mass flow rates. The casing treatment technique of stall control is found to be effective in axial compressors, but very limited research work is published on the application of this technique in centrifugal compressors. Present research was aimed to investigate the effect of casing treatment on the performance and stall margin of a high speed, 4 : 1 pressure ratio centrifugal compressor through numerical simulations using ANSYS CFX software. Three casing treatment configurations were developed and incorporated in the shroud over the inducer of the impeller. The predicted performance of baseline compressor (without casing treatment) was in good agreement with published experimental data. The compressor with different inducer casing treatment geometries showed varying levels of stall margin improvement, up to a maximum of 18%. While the peak efficiency of the compressor with casing treatment dropped by 0.8%–1% compared to the baseline compressor, the choke mass flow rate was improved by 9.5%, thus enhancing the total stable operating range. The inlet configuration of the casing treatment was found to play an important role in stall margin improvement.http://dx.doi.org/10.1155/2016/2371524 |
| spellingShingle | V. V. N. K. Satish Koyyalamudi Quamber H. Nagpurwala Stall Margin Improvement in a Centrifugal Compressor through Inducer Casing Treatment International Journal of Rotating Machinery |
| title | Stall Margin Improvement in a Centrifugal Compressor through Inducer Casing Treatment |
| title_full | Stall Margin Improvement in a Centrifugal Compressor through Inducer Casing Treatment |
| title_fullStr | Stall Margin Improvement in a Centrifugal Compressor through Inducer Casing Treatment |
| title_full_unstemmed | Stall Margin Improvement in a Centrifugal Compressor through Inducer Casing Treatment |
| title_short | Stall Margin Improvement in a Centrifugal Compressor through Inducer Casing Treatment |
| title_sort | stall margin improvement in a centrifugal compressor through inducer casing treatment |
| url | http://dx.doi.org/10.1155/2016/2371524 |
| work_keys_str_mv | AT vvnksatishkoyyalamudi stallmarginimprovementinacentrifugalcompressorthroughinducercasingtreatment AT quamberhnagpurwala stallmarginimprovementinacentrifugalcompressorthroughinducercasingtreatment |