A New Unsteady Flow Control Technology of Centrifugal Compressor Based on Negative Circulation Concept
The tip leakage vortex (TLV) induced by the tip clearance flow has a significant impact on the performance of centrifugal compressors, causing impeller flow losses and reducing the stall margin. To solve this problem, an unsteady flow control technology called the NCFC method is proposed based on th...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Hindawi Limited
2023-01-01
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| Series: | International Journal of Aerospace Engineering |
| Online Access: | http://dx.doi.org/10.1155/2023/6906266 |
| _version_ | 1797659067376730112 |
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| author | Shuli Hong Yuxuan Yang Weiyu Lu Xin Xiang |
| author_facet | Shuli Hong Yuxuan Yang Weiyu Lu Xin Xiang |
| author_sort | Shuli Hong |
| collection | DOAJ |
| description | The tip leakage vortex (TLV) induced by the tip clearance flow has a significant impact on the performance of centrifugal compressors, causing impeller flow losses and reducing the stall margin. To solve this problem, an unsteady flow control technology called the NCFC method is proposed based on the concept of negative circulation control, realized by a vortex generator placed in a tube connected with the shroud through a hole. The approach is derived from a theoretical study of the compressor TLV by introducing a two-dimensional vortex model. A numerical simulation is then performed to verify the effectiveness of the NCFC method. The result shows that the NCFC method can greatly stabilize the flow field at the blade tip and improve the stall margin and efficiency of the compressor without reducing the total pressure ratio of the compressor, which has the characteristics of both unsteadiness and negative circulation effect. In addition, a HC method with only unsteady excitation effect is also studied for comparison, which only slightly stabilizes the blade tip flow and increases the stall margin of the compressor, suggesting that the NCFC is more effective than the HC. Finally, it is highly recommended to improve the efficiency of any unsteady jet/suction and separation flow interaction. |
| first_indexed | 2024-03-11T18:08:36Z |
| format | Article |
| id | doaj.art-c41538aae44f4c9ea5a582a4e937b61a |
| institution | Directory Open Access Journal |
| issn | 1687-5974 |
| language | English |
| last_indexed | 2024-03-11T18:08:36Z |
| publishDate | 2023-01-01 |
| publisher | Hindawi Limited |
| record_format | Article |
| series | International Journal of Aerospace Engineering |
| spelling | doaj.art-c41538aae44f4c9ea5a582a4e937b61a2023-10-17T00:00:00ZengHindawi LimitedInternational Journal of Aerospace Engineering1687-59742023-01-01202310.1155/2023/6906266A New Unsteady Flow Control Technology of Centrifugal Compressor Based on Negative Circulation ConceptShuli Hong0Yuxuan Yang1Weiyu Lu2Xin Xiang3College of Mechanical and Automotive EngineeringCollege of Energy and Power EngineeringSchool of Physical and Mathematical SciencesSchool of Aeronautical Manufacturing EngineeringThe tip leakage vortex (TLV) induced by the tip clearance flow has a significant impact on the performance of centrifugal compressors, causing impeller flow losses and reducing the stall margin. To solve this problem, an unsteady flow control technology called the NCFC method is proposed based on the concept of negative circulation control, realized by a vortex generator placed in a tube connected with the shroud through a hole. The approach is derived from a theoretical study of the compressor TLV by introducing a two-dimensional vortex model. A numerical simulation is then performed to verify the effectiveness of the NCFC method. The result shows that the NCFC method can greatly stabilize the flow field at the blade tip and improve the stall margin and efficiency of the compressor without reducing the total pressure ratio of the compressor, which has the characteristics of both unsteadiness and negative circulation effect. In addition, a HC method with only unsteady excitation effect is also studied for comparison, which only slightly stabilizes the blade tip flow and increases the stall margin of the compressor, suggesting that the NCFC is more effective than the HC. Finally, it is highly recommended to improve the efficiency of any unsteady jet/suction and separation flow interaction.http://dx.doi.org/10.1155/2023/6906266 |
| spellingShingle | Shuli Hong Yuxuan Yang Weiyu Lu Xin Xiang A New Unsteady Flow Control Technology of Centrifugal Compressor Based on Negative Circulation Concept International Journal of Aerospace Engineering |
| title | A New Unsteady Flow Control Technology of Centrifugal Compressor Based on Negative Circulation Concept |
| title_full | A New Unsteady Flow Control Technology of Centrifugal Compressor Based on Negative Circulation Concept |
| title_fullStr | A New Unsteady Flow Control Technology of Centrifugal Compressor Based on Negative Circulation Concept |
| title_full_unstemmed | A New Unsteady Flow Control Technology of Centrifugal Compressor Based on Negative Circulation Concept |
| title_short | A New Unsteady Flow Control Technology of Centrifugal Compressor Based on Negative Circulation Concept |
| title_sort | new unsteady flow control technology of centrifugal compressor based on negative circulation concept |
| url | http://dx.doi.org/10.1155/2023/6906266 |
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