Flow Control by Slot Position and Noise Baffle in a Self-Recirculation Casing Treatment on an Axial Fan-Rotor
To address the situations where the casing treatment needs to be used to stabilize axial compressors through strong recirculation, this paper initiated a CFD study to investigate how the flow could be suitably controlled in the casing treatment to minimize the efficiency penalty and increase the flo...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2017-01-01
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| Series: | International Journal of Rotating Machinery |
| Online Access: | http://dx.doi.org/10.1155/2017/9509212 |
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| _version_ | 1849413061063999488 |
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| author | Xiangjun Li Stephen Spence Hua Chen Wuli Chu Lee Gibson |
| author_facet | Xiangjun Li Stephen Spence Hua Chen Wuli Chu Lee Gibson |
| author_sort | Xiangjun Li |
| collection | DOAJ |
| description | To address the situations where the casing treatment needs to be used to stabilize axial compressors through strong recirculation, this paper initiated a CFD study to investigate how the flow could be suitably controlled in the casing treatment to minimize the efficiency penalty and increase the flow range. A counter-swirl self-recirculation casing treatment was first designed on a low speed axial fan rotor as a baseline case. Then three different slot positions and the influence of including the noise baffle were numerically studied. Based on the understanding of their coeffects, the shorter noise baffle was considered and it was found that the highest efficiency was achieved in the case of the upstream slot when the length of baffle was suitably adjusted to balance the incoming flow and recirculation. The largest flow range was achieved by locating the slot at the most downstream position and using a 50% length baffle since it suitably controlled the recirculating flow and relieved the separation at the low-span region. An optimization study showed that the optimum length of the baffle for efficiency was always larger than for the flow range. Both of the two optimum values reduce as the slot moves downstream. |
| format | Article |
| id | doaj-art-5d0aa9f60d754de3825430fe9cf971f9 |
| institution | Kabale University |
| issn | 1023-621X 1542-3034 |
| language | English |
| publishDate | 2017-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Rotating Machinery |
| spelling | doaj-art-5d0aa9f60d754de3825430fe9cf971f92025-08-20T03:34:14ZengWileyInternational Journal of Rotating Machinery1023-621X1542-30342017-01-01201710.1155/2017/95092129509212Flow Control by Slot Position and Noise Baffle in a Self-Recirculation Casing Treatment on an Axial Fan-RotorXiangjun Li0Stephen Spence1Hua Chen2Wuli Chu3Lee Gibson4School of Power and Energy, Northwestern Polytechnical University, Xi’an, ChinaSchool of Mechanical and Aerospace Engineering, Queen’s University Belfast, Belfast, UKNational Laboratory of Engine Turbocharging Technology, Tianjin, ChinaSchool of Power and Energy, Northwestern Polytechnical University, Xi’an, ChinaSchool of Mechanical and Aerospace Engineering, Queen’s University Belfast, Belfast, UKTo address the situations where the casing treatment needs to be used to stabilize axial compressors through strong recirculation, this paper initiated a CFD study to investigate how the flow could be suitably controlled in the casing treatment to minimize the efficiency penalty and increase the flow range. A counter-swirl self-recirculation casing treatment was first designed on a low speed axial fan rotor as a baseline case. Then three different slot positions and the influence of including the noise baffle were numerically studied. Based on the understanding of their coeffects, the shorter noise baffle was considered and it was found that the highest efficiency was achieved in the case of the upstream slot when the length of baffle was suitably adjusted to balance the incoming flow and recirculation. The largest flow range was achieved by locating the slot at the most downstream position and using a 50% length baffle since it suitably controlled the recirculating flow and relieved the separation at the low-span region. An optimization study showed that the optimum length of the baffle for efficiency was always larger than for the flow range. Both of the two optimum values reduce as the slot moves downstream.http://dx.doi.org/10.1155/2017/9509212 |
| spellingShingle | Xiangjun Li Stephen Spence Hua Chen Wuli Chu Lee Gibson Flow Control by Slot Position and Noise Baffle in a Self-Recirculation Casing Treatment on an Axial Fan-Rotor International Journal of Rotating Machinery |
| title | Flow Control by Slot Position and Noise Baffle in a Self-Recirculation Casing Treatment on an Axial Fan-Rotor |
| title_full | Flow Control by Slot Position and Noise Baffle in a Self-Recirculation Casing Treatment on an Axial Fan-Rotor |
| title_fullStr | Flow Control by Slot Position and Noise Baffle in a Self-Recirculation Casing Treatment on an Axial Fan-Rotor |
| title_full_unstemmed | Flow Control by Slot Position and Noise Baffle in a Self-Recirculation Casing Treatment on an Axial Fan-Rotor |
| title_short | Flow Control by Slot Position and Noise Baffle in a Self-Recirculation Casing Treatment on an Axial Fan-Rotor |
| title_sort | flow control by slot position and noise baffle in a self recirculation casing treatment on an axial fan rotor |
| url | http://dx.doi.org/10.1155/2017/9509212 |
| work_keys_str_mv | AT xiangjunli flowcontrolbyslotpositionandnoisebaffleinaselfrecirculationcasingtreatmentonanaxialfanrotor AT stephenspence flowcontrolbyslotpositionandnoisebaffleinaselfrecirculationcasingtreatmentonanaxialfanrotor AT huachen flowcontrolbyslotpositionandnoisebaffleinaselfrecirculationcasingtreatmentonanaxialfanrotor AT wulichu flowcontrolbyslotpositionandnoisebaffleinaselfrecirculationcasingtreatmentonanaxialfanrotor AT leegibson flowcontrolbyslotpositionandnoisebaffleinaselfrecirculationcasingtreatmentonanaxialfanrotor |