Aerothermal Investigation of Backface Clearance Flow in Deeply Scalloped Radial Turbines
文献类型：期刊论文
| 作者 | He, Ping1,2; Sun, Zhigang2; Guo, Baoting2; Chen, Haisheng2; Tan, Chunqing2 |
| 刊名 | JOURNAL OF TURBOMACHINERY-TRANSACTIONS OF THE ASME
 |
| 出版日期 | 2013-03-01 |
| 卷号 | 135期号:2 |
| 英文摘要 | A numerical investigation of flow structure and heat transfer in the backface clearance of deeply scalloped radial turbines is conducted in this paper. It is found that the leakage flow is very strong in the upper radial region whereas in the lower radial region, the scraping flow dominates over the clearance and a recirculation zone is formed. Pressure distributions are given to explain the flow structure in the backface clearance, and it is found that due to the sharp reduction of radial velocity and Coriolis force, the pressure difference in the lower radial region is reduced drastically, which is the mechanism for the domination of the scraping flow and the corresponding recirculation zone. There are two high heat transfer coefficient zones on the backface surface. One is located in the upper radial region due to the reattachment of the leakage flow and the other is located in the lower radial region caused by the impingement of the scraping flow. Increase of the clearance height reduces the high heat transfer coefficient caused by the impingement of the scraping flow, although it increases the leakage loss. On the other hand, the high heat transfer coefficient in the upper radial region can be reduced remarkably by using the suction side squealer geometry. [DOI: 10.1115/1.4006664] |
| WOS标题词 | Science & Technology ; Technology |
| 类目[WOS] | Engineering, Mechanical |
| 研究领域[WOS] | Engineering |
| 关键词[WOS] | HEAT-TRANSFER ; GAS-TURBINE ; BLADE TIP ; SQUEALER TIP |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000315260400002 |
| 公开日期 | 2015-12-22 |
| 源URL | [http://ir.etp.ac.cn/handle/311046/98867]  |
| 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 Univ, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Inst Engn Thermophys, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | He, Ping,Sun, Zhigang,Guo, Baoting,et al. Aerothermal Investigation of Backface Clearance Flow in Deeply Scalloped Radial Turbines[J]. JOURNAL OF TURBOMACHINERY-TRANSACTIONS OF THE ASME,2013,135(2). |
| APA | He, Ping,Sun, Zhigang,Guo, Baoting,Chen, Haisheng,&Tan, Chunqing.(2013).Aerothermal Investigation of Backface Clearance Flow in Deeply Scalloped Radial Turbines.JOURNAL OF TURBOMACHINERY-TRANSACTIONS OF THE ASME,135(2). |
| MLA | He, Ping,et al."Aerothermal Investigation of Backface Clearance Flow in Deeply Scalloped Radial Turbines".JOURNAL OF TURBOMACHINERY-TRANSACTIONS OF THE ASME 135.2(2013). |
入库方式： OAI收割
来源：工程热物理研究所
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