Numerical Investigation on the Self-Induced Unsteadiness in Tip Leakage Flow for a Transonic Fan Rotor
文献类型：期刊论文
| 作者 | Du, Juan1,2,3; Lin, Feng4; Zhang, Hongwu5,6; Chen, Jingyi5,6 |
| 刊名 | JOURNAL OF TURBOMACHINERY-TRANSACTIONS OF THE ASME
 |
| 出版日期 | 2010-04-01 |
| 卷号 | 132期号:2 |
| 关键词 | blades fans flow instability fluid oscillations numerical analysis pattern formation rotors shock waves transonic flow turbulence vortices |
| 英文摘要 | A numerical investigation on the self-induced unsteadiness in tip leakage flow is presented for a transonic fan rotor. NASA Rotor 67 is chosen as the computational model. It is found that under certain conditions the self-induced unsteadiness can be originated from the interaction of two important driving "forces:" the incoming main flow and the tip leakage flow. Among all the simulated cases, the self-induced unsteadiness exists when the size of the tip clearance is equal to or larger than the design tip clearance. The originating mechanism of the unsteadiness is clarified through time-dependent internal flow patterns in the rotor tip region. It is demonstrated that when strong enough, the tip leakage flow impinges the pressure side of neighboring blade and alters the blade loading significantly. The blade loading in turn changes the strength of the tip leakage flow and results in a flow oscillation with a typical signature frequency. This periodic process is further illustrated by the time-space relation between the driving forces. A correlation based on the momentum ratio of tip leakage flow over the incoming main flow at the tip region is used as an indicator for the onset of the self-induced unsteadiness in tip leakage flow. It is discussed that the interaction between shock wave and tip leakage vortex does not initiate the self-induced unsteadiness, but might be the cause of other types of unsteadiness, such as broad-banded turbulence unsteadiness. |
| WOS标题词 | Science & Technology ; Technology |
| 类目[WOS] | Engineering, Mechanical |
| 研究领域[WOS] | Engineering |
| 收录类别 | SCI ; ISTP |
| 语种 | 英语 |
| WOS记录号 | WOS:000273877000017 |
| 公开日期 | 2015-12-22 |
| 源URL | [http://ir.etp.ac.cn/handle/311046/106473]  |
| 专题 | 工程热物理研究所_中国科学院工程热物理所（论文库）_期刊论文（SCI） |
| 作者单位 | 1.Chinese Acad Sci, Grad Sch, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Inst Engn Thermophys, Beijing 100190, Peoples R China 3.Chinese Acad Sci, Key Lab Adv Energy & Power, IET, Beijing 100190, Peoples R China 4.Tristate Univ, Angola, IN 46703 USA 5.Chinese Acad Sci, Inst Engn Thermophys, Beijing 100080, Peoples R China 6.Chinese Acad Sci, Key Lab Adv Energy & Power, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Du, Juan,Lin, Feng,Zhang, Hongwu,et al. Numerical Investigation on the Self-Induced Unsteadiness in Tip Leakage Flow for a Transonic Fan Rotor[J]. JOURNAL OF TURBOMACHINERY-TRANSACTIONS OF THE ASME,2010,132(2). |
| APA | Du, Juan,Lin, Feng,Zhang, Hongwu,&Chen, Jingyi.(2010).Numerical Investigation on the Self-Induced Unsteadiness in Tip Leakage Flow for a Transonic Fan Rotor.JOURNAL OF TURBOMACHINERY-TRANSACTIONS OF THE ASME,132(2). |
| MLA | Du, Juan,et al."Numerical Investigation on the Self-Induced Unsteadiness in Tip Leakage Flow for a Transonic Fan Rotor".JOURNAL OF TURBOMACHINERY-TRANSACTIONS OF THE ASME 132.2(2010). |
入库方式： OAI收割
来源：工程热物理研究所
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