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Investigation of backface cavity sealing flow in deeply scalloped radial turbines

文献类型：期刊论文

作者He, Ping1,2; Sun, Zhi Gang1; Chen, Hai Sheng1; Tan, Chun Qing1
刊名PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART A-JOURNAL OF POWER AND ENERGY
出版日期2012
卷号226期号:A6页码:751-763
关键词Deeply scalloped radial turbine backface cavity sealing flow unsteady cooling effectiveness ingestion
英文摘要The backface cavity sealing flow in deeply scalloped radial turbines is numerically investigated in this article. Both the time-averaged and unsteady results are shown, and three cavity sealing geometry models are analyzed. It is found that the the sealing flow strengthens the backface casing scraping flow in the lower radial region of backface clearance, cools the root of the blade backface and prevents hot gas ingestion. With the same disk radius ratio, the model with a radial clearance shows a better performance on cooling and sealing effectiveness than that with an axial clearance. The model with a radial clearance and a larger disk radius ratio has a higher isentropic efficiency. However, the axial thrust increases drastically and the cooling effectiveness is very low. Furthermore, the sealing effectiveness for the model decreases sharply because of the larger circumferential pressure difference near the disk rim and the higher rotational Reynolds number. In transient state, the amplitude of pressure and temperature increases significantly near the disk rim. And an unsteady flow pattern with high pressure and ingestion zones rotating at twice the rotational speed in the counter rotating direction, is found on the disk backface surface.
WOS标题词Science & Technology ; Technology
类目[WOS]Engineering, Mechanical
研究领域[WOS]Engineering
关键词[WOS]ROTOR-STATOR SYSTEMS ; AERODYNAMIC ASPECTS ; EXTERNAL FLOW ; PERFORMANCE ; INGESTION ; COOLANT
收录类别SCI
语种英语
WOS记录号WOS:000312154000003
公开日期2015-12-22
源URL[http://ir.etp.ac.cn/handle/311046/101532]  
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, Inst Engn Thermophys, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100190, Peoples R China
推荐引用方式
GB/T 7714		 He, Ping,Sun, Zhi Gang,Chen, Hai Sheng,et al. Investigation of backface cavity sealing flow in deeply scalloped radial turbines[J]. PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART A-JOURNAL OF POWER AND ENERGY,2012,226(A6):751-763.
APA He, Ping,Sun, Zhi Gang,Chen, Hai Sheng,&Tan, Chun Qing.(2012).Investigation of backface cavity sealing flow in deeply scalloped radial turbines.PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART A-JOURNAL OF POWER AND ENERGY,226(A6),751-763.
MLA He, Ping,et al."Investigation of backface cavity sealing flow in deeply scalloped radial turbines".PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART A-JOURNAL OF POWER AND ENERGY 226.A6(2012):751-763.

入库方式： OAI收割

来源：工程热物理研究所

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