A novel method for work capacity calculation of centrifugal compressor impellers in energy storage systems
As the basis for centrifugal compressor design, the traditional one-dimensional scheme assumes that there is no flow prewhirl at the impeller inlet (i.e., C1u=0) when inlet guide vanes (IGVs) are absent. However, various experiments have proved that a natural prewhirl does exist at the impeller inle...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-12-01
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| Series: | Energy Reports |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352484722020534 |
| _version_ | 1797952153692667904 |
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| author | Fenghui Han Zhe Wang Yijun Mao Jiajian Tan |
| author_facet | Fenghui Han Zhe Wang Yijun Mao Jiajian Tan |
| author_sort | Fenghui Han |
| collection | DOAJ |
| description | As the basis for centrifugal compressor design, the traditional one-dimensional scheme assumes that there is no flow prewhirl at the impeller inlet (i.e., C1u=0) when inlet guide vanes (IGVs) are absent. However, various experiments have proved that a natural prewhirl does exist at the impeller inlet even there is no IGV. In this study, a novel method is proposed to calculate the Euler work of impellers considering the natural prewhirl, and firstly applied to centrifugal compressors without IGVs. Stodola’s approach dealing with the slip velocity at the impeller outlet is adopted to the flow at the impeller inlet. A new formula for the Euler work calculation is deduced to evaluate the effect of natural prewhirl on centrifugal impellers. Then, this method is applied in two different model stages of industrial centrifugal compressors to verify against the experimental and numerical data. The results indicate that, compared to the traditional scheme assuming C1u=0, the novel method with modified formula considering the influence of C1u≠ 0 is more feasible for high-speed centrifugal compressors. With the aid of the novel calculation method proposed in this paper, the one-dimensional design accuracies of centrifugal compressor stages are improved by 7% compared with the traditional method. |
| first_indexed | 2024-04-10T22:41:50Z |
| format | Article |
| id | doaj.art-84ecc69ff1d840a4b01d428473270c44 |
| institution | Directory Open Access Journal |
| issn | 2352-4847 |
| language | English |
| last_indexed | 2024-04-10T22:41:50Z |
| publishDate | 2022-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Energy Reports |
| spelling | doaj.art-84ecc69ff1d840a4b01d428473270c442023-01-16T04:08:26ZengElsevierEnergy Reports2352-48472022-12-018144152A novel method for work capacity calculation of centrifugal compressor impellers in energy storage systemsFenghui Han0Zhe Wang1Yijun Mao2Jiajian Tan3Marine Engineering College, Dalian Maritime University, Linghai Road 1, Dalian 116026, China; National Center for International Research of Subsea Engineering Technology and Equipment, Dalian Maritime University, Linghai Road 1, Dalian 116026, ChinaMarine Engineering College, Dalian Maritime University, Linghai Road 1, Dalian 116026, China; National Center for International Research of Subsea Engineering Technology and Equipment, Dalian Maritime University, Linghai Road 1, Dalian 116026, China; Corresponding author at: Marine Engineering College, Dalian Maritime University, Linghai Road 1, Dalian 116026, China.School of Aerospace Engineering, Huazhong University of Science & Technology, Luoyu Road 1037, Wuhan 430074, ChinaDepartment of Research & Development, Shenyang Blower Works Group Co., Ltd, Kaifa Road 16A, Shengyang 110869, ChinaAs the basis for centrifugal compressor design, the traditional one-dimensional scheme assumes that there is no flow prewhirl at the impeller inlet (i.e., C1u=0) when inlet guide vanes (IGVs) are absent. However, various experiments have proved that a natural prewhirl does exist at the impeller inlet even there is no IGV. In this study, a novel method is proposed to calculate the Euler work of impellers considering the natural prewhirl, and firstly applied to centrifugal compressors without IGVs. Stodola’s approach dealing with the slip velocity at the impeller outlet is adopted to the flow at the impeller inlet. A new formula for the Euler work calculation is deduced to evaluate the effect of natural prewhirl on centrifugal impellers. Then, this method is applied in two different model stages of industrial centrifugal compressors to verify against the experimental and numerical data. The results indicate that, compared to the traditional scheme assuming C1u=0, the novel method with modified formula considering the influence of C1u≠ 0 is more feasible for high-speed centrifugal compressors. With the aid of the novel calculation method proposed in this paper, the one-dimensional design accuracies of centrifugal compressor stages are improved by 7% compared with the traditional method.http://www.sciencedirect.com/science/article/pii/S2352484722020534Centrifugal compressorCentrifugal impellerNatural prewhirlEuler work calculation |
| spellingShingle | Fenghui Han Zhe Wang Yijun Mao Jiajian Tan A novel method for work capacity calculation of centrifugal compressor impellers in energy storage systems Energy Reports Centrifugal compressor Centrifugal impeller Natural prewhirl Euler work calculation |
| title | A novel method for work capacity calculation of centrifugal compressor impellers in energy storage systems |
| title_full | A novel method for work capacity calculation of centrifugal compressor impellers in energy storage systems |
| title_fullStr | A novel method for work capacity calculation of centrifugal compressor impellers in energy storage systems |
| title_full_unstemmed | A novel method for work capacity calculation of centrifugal compressor impellers in energy storage systems |
| title_short | A novel method for work capacity calculation of centrifugal compressor impellers in energy storage systems |
| title_sort | novel method for work capacity calculation of centrifugal compressor impellers in energy storage systems |
| topic | Centrifugal compressor Centrifugal impeller Natural prewhirl Euler work calculation |
| url | http://www.sciencedirect.com/science/article/pii/S2352484722020534 |
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