Numerical and Experimental Investigations of Steady Micro-Tip Injection on a Subsonic Axial-Flow Compressor Rotor
Steady tip injection has been demonstrated to be an effective means of extending the stable operating range of a tip-critical compressor. This study presents a state-of-the-art design for the tip injection through the casing with flush-mounted inclined holes and the effectiveness of steady micro-air...
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| Format: | Article |
| Language: | English |
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Wiley
2006-01-01
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| Series: | International Journal of Rotating Machinery |
| Online Access: | http://dx.doi.org/10.1155/IJRM/2006/71034 |
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| author | Xingen Lu Wuli Chu Junqiang Zhu Zhiting Tong |
| author_facet | Xingen Lu Wuli Chu Junqiang Zhu Zhiting Tong |
| author_sort | Xingen Lu |
| collection | DOAJ |
| description | Steady tip injection has been demonstrated to be an effective means of extending the stable operating range of a tip-critical compressor. This study presents a state-of-the-art design for the tip injection through the casing with flush-mounted inclined holes and the effectiveness of steady micro-air injection to enhance stability in a subsonic axial-flow compressor rotor using an external-air supply. For the tested rotor, experimental results demonstrate that at 53% design speed, the stalling mass flow can be reduced by 7.69% using an injected mass flow equivalent to 0.064% of the annulus flow. Time-dependent CFD simulations were conducted to identify the physical mechanic that accounts for the beneficial effects of the steady micro-air injection on the performance and stability of the compressor. Detailed analyses of the flow visualization at the tip have exposed the different tip flow topologies between the cases without tip injection and with tip injection. It was found that the primary stall margin enhancement afforded by the steady micro-air injection is a result of the
tip-clearance flow manipulation. The repositioning of the tip-clearance vortex further towards the trailing edge of the blade passage and delaying the movement of incoming/tip-clearance flow interface to the leading edge plane are the physical mechanisms responsible for extending the compressor stall margin. |
| format | Article |
| id | doaj-art-c086694f46a24e9f99d06beeab35acd7 |
| institution | DOAJ |
| issn | 1023-621X 1542-3034 |
| language | English |
| publishDate | 2006-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Rotating Machinery |
| spelling | doaj-art-c086694f46a24e9f99d06beeab35acd72025-08-20T03:23:23ZengWileyInternational Journal of Rotating Machinery1023-621X1542-30342006-01-01200610.1155/IJRM/2006/7103471034Numerical and Experimental Investigations of Steady Micro-Tip Injection on a Subsonic Axial-Flow Compressor RotorXingen Lu0Wuli Chu1Junqiang Zhu2Zhiting Tong3School of Power and Energy, Northwestern Polytechnical University, Xi'an 710072, ChinaSchool of Power and Energy, Northwestern Polytechnical University, Xi'an 710072, ChinaInstitute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 10080, ChinaInstitute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 10080, ChinaSteady tip injection has been demonstrated to be an effective means of extending the stable operating range of a tip-critical compressor. This study presents a state-of-the-art design for the tip injection through the casing with flush-mounted inclined holes and the effectiveness of steady micro-air injection to enhance stability in a subsonic axial-flow compressor rotor using an external-air supply. For the tested rotor, experimental results demonstrate that at 53% design speed, the stalling mass flow can be reduced by 7.69% using an injected mass flow equivalent to 0.064% of the annulus flow. Time-dependent CFD simulations were conducted to identify the physical mechanic that accounts for the beneficial effects of the steady micro-air injection on the performance and stability of the compressor. Detailed analyses of the flow visualization at the tip have exposed the different tip flow topologies between the cases without tip injection and with tip injection. It was found that the primary stall margin enhancement afforded by the steady micro-air injection is a result of the tip-clearance flow manipulation. The repositioning of the tip-clearance vortex further towards the trailing edge of the blade passage and delaying the movement of incoming/tip-clearance flow interface to the leading edge plane are the physical mechanisms responsible for extending the compressor stall margin.http://dx.doi.org/10.1155/IJRM/2006/71034 |
| spellingShingle | Xingen Lu Wuli Chu Junqiang Zhu Zhiting Tong Numerical and Experimental Investigations of Steady Micro-Tip Injection on a Subsonic Axial-Flow Compressor Rotor International Journal of Rotating Machinery |
| title | Numerical and Experimental Investigations of Steady Micro-Tip Injection on a Subsonic Axial-Flow Compressor Rotor |
| title_full | Numerical and Experimental Investigations of Steady Micro-Tip Injection on a Subsonic Axial-Flow Compressor Rotor |
| title_fullStr | Numerical and Experimental Investigations of Steady Micro-Tip Injection on a Subsonic Axial-Flow Compressor Rotor |
| title_full_unstemmed | Numerical and Experimental Investigations of Steady Micro-Tip Injection on a Subsonic Axial-Flow Compressor Rotor |
| title_short | Numerical and Experimental Investigations of Steady Micro-Tip Injection on a Subsonic Axial-Flow Compressor Rotor |
| title_sort | numerical and experimental investigations of steady micro tip injection on a subsonic axial flow compressor rotor |
| url | http://dx.doi.org/10.1155/IJRM/2006/71034 |
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