Knowledge Management System of Institue of Mechanics, CAS
| Flow characteristic of a multistage radial turbine for supercritical compressed air energy storage system | |
Wang X; Li W; Zhang XH ; Zhu YL; Qin W(秦伟); Chen HS
| |
| Source Publication | PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART A-JOURNAL OF POWER AND ENERGY
 |
| 2018-09-01 | |
| Volume | 232Issue:6Pages:622-640 |
| ISSN | 0957-6509 |
| Abstract | Compressed air in supercritical compressed air energy storage system expand from supercritical to atmospheric conditions at lower inlet temperature (<500K) to generate MW scale power. Therefore, a new multistage radial turbine is adopted and the flow characteristic is investigated by numerical simulation. Effects of ideal gas model and tip clearance on the performance and flow field of the multistage turbine are revealed. Results show that ideal gas model can reveal flow pattern under supercritical condition correctly while leading to obvious deviation of isentropic enthalpy drop, entropy, and inlet-to-exit total temperature ratio. Relative differences for mass flow and efficiency are less than 2%, while the relative differences for output power reaches to 9.36%. For shrouded rotor, mixing of working fluid near hub, blade suction surface, and shroud is the main influencing factor of the flow loss in the rotor. For unshrouded rotor, leakage vortex promote mixture of the fluid deriving from the hub, shroud, and suction surface, and causes much higher flow loss in the channel of rotor. The rotors, which have higher blade height variation rate, present higher efficiency reduction when the tip clearance height is increased, which is because the proportion of tip clearance in blade inlet height increases with the increase of average aspect ratio, resulting in the increase of leakage flow at the leading edge of rotor blade. The pressure fluctuation near the tip clearance and efficiency reduction is also increased. The present study provides a reference for further design and optimization of the multistage radial turbines in compressed air energy storage. |
| Keyword | Compressed air energy storage multistage radial turbine computational fluid dynamics |
| DOI | 10.1177/0957650917743366 |
| URL | 查看原文 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000443311900004 |
| WOS Keyword | DESIGN |
| WOS Research Area | Thermodynamics ; Engineering, Mechanical |
| WOS Subject | Thermodynamics ; Engineering |
| Funding Organization | National Natural Science Foundation of China [51522605, 51406206] ; Key Project of Chinese National Programs for Fundamental Research, Development (973 program) [2015CB251302] ; CAS Interdisciplinary Innovation Team Fund |
| Classification | Q4 |
| Ranking | 5 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/77950 |
| Collection | 职能与支撑部门 |
| Affiliation | 1.Chinese Acad Sci, Inst Engn Thermophys, 11 Beisihuanxi Rd, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Inst Mech, Beijing, Peoples R China |
| Recommended Citation GB/T 7714 | Wang X,Li W,Zhang XH,et al. Flow characteristic of a multistage radial turbine for supercritical compressed air energy storage system[J]. PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART A-JOURNAL OF POWER AND ENERGY,2018,232(6):622-640. |
| APA | Wang X,Li W,Zhang XH,Zhu YL,秦伟,&Chen HS.(2018).Flow characteristic of a multistage radial turbine for supercritical compressed air energy storage system.PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART A-JOURNAL OF POWER AND ENERGY,232(6),622-640. |
| MLA | Wang X,et al."Flow characteristic of a multistage radial turbine for supercritical compressed air energy storage system".PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART A-JOURNAL OF POWER AND ENERGY 232.6(2018):622-640. |
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| IrJ2018339.pdf（5022KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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