Study on the characteristics of horn-like vortices in an axial flow pump impeller under off-design conditions
The dominant vortex structure near the hub in rotor corner separation flow has an important influence on the internal flow of the axial flow rotating machinery. However, the current quantitative research on the key vortical characteristics of the dominant vortex structure in the corner separation fl...
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Taylor & Francis Group
2021
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oai:doaj.org-article:ba7d3f3bda464489bf825e12970fa2892021-11-04T15:00:43ZStudy on the characteristics of horn-like vortices in an axial flow pump impeller under off-design conditions1994-20601997-003X10.1080/19942060.2021.1985615https://doaj.org/article/ba7d3f3bda464489bf825e12970fa2892021-01-01T00:00:00Zhttp://dx.doi.org/10.1080/19942060.2021.1985615https://doaj.org/toc/1994-2060https://doaj.org/toc/1997-003XThe dominant vortex structure near the hub in rotor corner separation flow has an important influence on the internal flow of the axial flow rotating machinery. However, the current quantitative research on the key vortical characteristics of the dominant vortex structure in the corner separation flow is still insufficient. The analysis of the dominant vortex structure (horn-like vortex) in an axial flow pump was conducted and found that the average vortex intensity and turbulence eddy dissipation show a gradual weakening trend along the vortex core line from the corner region to the vortex tail under various working conditions. The evolution of the horn-like vortex in a life cycle includes five stages, inception-growth-development-attachment-decay in the typical working condition 0.62Q0. The statistical average frequency of the periodic evolution is about 2.76 times the shaft rotation frequency. The pressure fluctuation near the hub induced by the horn-like vortex increases rapidly and dominates in the flow channel. The average peak-peak value on the impeller outlet section close to the horn-like vortex is about 2.79 times that of the impeller inlet section and should be paid enough attention to.Haoru ZhaoFujun WangChaoyue WangWenhao ChenZhifeng YaoXiaoyan ShiXiaoqin LiQiang ZhongTaylor & Francis Grouparticleaxial flow pumpcorner separationhorn-like vortexperiodic evolutionpressure fluctuationEngineering (General). Civil engineering (General)TA1-2040ENEngineering Applications of Computational Fluid Mechanics, Vol 15, Iss 1, Pp 1613-1628 (2021) |
| institution |
DOAJ |
| collection |
DOAJ |
| language |
EN |
| topic |
axial flow pump corner separation horn-like vortex periodic evolution pressure fluctuation Engineering (General). Civil engineering (General) TA1-2040 |
| spellingShingle |
axial flow pump corner separation horn-like vortex periodic evolution pressure fluctuation Engineering (General). Civil engineering (General) TA1-2040 Haoru Zhao Fujun Wang Chaoyue Wang Wenhao Chen Zhifeng Yao Xiaoyan Shi Xiaoqin Li Qiang Zhong Study on the characteristics of horn-like vortices in an axial flow pump impeller under off-design conditions |
| description |
The dominant vortex structure near the hub in rotor corner separation flow has an important influence on the internal flow of the axial flow rotating machinery. However, the current quantitative research on the key vortical characteristics of the dominant vortex structure in the corner separation flow is still insufficient. The analysis of the dominant vortex structure (horn-like vortex) in an axial flow pump was conducted and found that the average vortex intensity and turbulence eddy dissipation show a gradual weakening trend along the vortex core line from the corner region to the vortex tail under various working conditions. The evolution of the horn-like vortex in a life cycle includes five stages, inception-growth-development-attachment-decay in the typical working condition 0.62Q0. The statistical average frequency of the periodic evolution is about 2.76 times the shaft rotation frequency. The pressure fluctuation near the hub induced by the horn-like vortex increases rapidly and dominates in the flow channel. The average peak-peak value on the impeller outlet section close to the horn-like vortex is about 2.79 times that of the impeller inlet section and should be paid enough attention to. |
| format |
article |
| author |
Haoru Zhao Fujun Wang Chaoyue Wang Wenhao Chen Zhifeng Yao Xiaoyan Shi Xiaoqin Li Qiang Zhong |
| author_facet |
Haoru Zhao Fujun Wang Chaoyue Wang Wenhao Chen Zhifeng Yao Xiaoyan Shi Xiaoqin Li Qiang Zhong |
| author_sort |
Haoru Zhao |
| title |
Study on the characteristics of horn-like vortices in an axial flow pump impeller under off-design conditions |
| title_short |
Study on the characteristics of horn-like vortices in an axial flow pump impeller under off-design conditions |
| title_full |
Study on the characteristics of horn-like vortices in an axial flow pump impeller under off-design conditions |
| title_fullStr |
Study on the characteristics of horn-like vortices in an axial flow pump impeller under off-design conditions |
| title_full_unstemmed |
Study on the characteristics of horn-like vortices in an axial flow pump impeller under off-design conditions |
| title_sort |
study on the characteristics of horn-like vortices in an axial flow pump impeller under off-design conditions |
| publisher |
Taylor & Francis Group |
| publishDate |
2021 |
| url |
https://doaj.org/article/ba7d3f3bda464489bf825e12970fa289 |
| work_keys_str_mv |
AT haoruzhao studyonthecharacteristicsofhornlikevorticesinanaxialflowpumpimpellerunderoffdesignconditions AT fujunwang studyonthecharacteristicsofhornlikevorticesinanaxialflowpumpimpellerunderoffdesignconditions AT chaoyuewang studyonthecharacteristicsofhornlikevorticesinanaxialflowpumpimpellerunderoffdesignconditions AT wenhaochen studyonthecharacteristicsofhornlikevorticesinanaxialflowpumpimpellerunderoffdesignconditions AT zhifengyao studyonthecharacteristicsofhornlikevorticesinanaxialflowpumpimpellerunderoffdesignconditions AT xiaoyanshi studyonthecharacteristicsofhornlikevorticesinanaxialflowpumpimpellerunderoffdesignconditions AT xiaoqinli studyonthecharacteristicsofhornlikevorticesinanaxialflowpumpimpellerunderoffdesignconditions AT qiangzhong studyonthecharacteristicsofhornlikevorticesinanaxialflowpumpimpellerunderoffdesignconditions |
| _version_ |
1718444794925023232 |