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Tip leakage flow analysis of an axial turbine under the effect of separation at low Reynolds number
Shao ZY1,2; Li W1,2; Zhu YL1; Wang X1; Zhang XH1; Chen HS1,2; Qin W(秦伟)3
Corresponding AuthorChen, Haisheng(chen_hs@mail.etp.ac.cn)
Source PublicationPROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART A-JOURNAL OF POWER AND ENERGY
2019-10-23
Pages15
ISSN0957-6509
AbstractThe tip clearance flow could lead to work reduction and loss generation in turbomachines. However, the effect of separation at low Reynolds number on leakage flow is seldom studied. The previous method for evaluating tip leakage characteristics should also be further researched. Thus, numerical investigations on the tip clearance flow in an unshrouded axial-inflow turbine are conducted at low Reynolds number (3.5 x 10(4) of the rotor outlet at the designed condition) in the present study. The flow patterns and leakage mass flow rate of the clearance have been analyzed in detail. It is found that the tip clearance flow is greatly affected by the flow separation caused by low Reynolds number. The scraping ratio adopted in previous references does not accord with the clearance flow characteristics at low Reynolds number, especially in the front part of the clearance. A coefficient by -0.70 power of the Reynolds number is proposed to modify the scraping ratio in the present study. The synergy between the velocity and the pressure gradient is innovatively employed to research the tip clearance flow characteristics, and it gives a reliable criterion of indicating the flow patterns in the tip clearance.
KeywordTurbines turbomachinery flow turbomachinery aerodynamics turbine modeling
DOI10.1177/0957650919882877
Indexed BySCI ; EI
Language英语
WOS IDWOS:000492610800001
WOS KeywordPHYSICAL QUANTITY SYNERGY ; CLEARANCE FLOW ; HEAT-TRANSFER ; ROTOR ; BLADE ; FIELD ; PREDICTION ; TURBULENCE ; LOSSES
WOS Research AreaThermodynamics ; Engineering
WOS SubjectThermodynamics ; Engineering, Mechanical
Funding ProjectNational Key RD Plan[2017YFB0903602] ; National Natural Science Foundation of China[51522605] ; frontier science research project of CAS[QYZDB-SSW-JSC023] ; Newton Advanced Fellowship of the Royal Society[NA170093]
Funding OrganizationNational Key RD Plan ; National Natural Science Foundation of China ; frontier science research project of CAS ; Newton Advanced Fellowship of the Royal Society
ClassificationQ4
Ranking5+
ContributorChen, Haisheng
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/81416
Collection职能与支撑部门
Affiliation1.Chinese Acad Sci, Inst Engn Thermophys, 11 4th Ring Rd, Beijing 100190, Peoples R China;
2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing, Peoples R China;
3.Chinese Acad Sci, Inst Mech, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Shao ZY,Li W,Zhu YL,et al. Tip leakage flow analysis of an axial turbine under the effect of separation at low Reynolds number[J]. PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART A-JOURNAL OF POWER AND ENERGY,2019:15.
APA Shao ZY.,Li W.,Zhu YL.,Wang X.,Zhang XH.,...&秦伟.(2019).Tip leakage flow analysis of an axial turbine under the effect of separation at low Reynolds number.PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART A-JOURNAL OF POWER AND ENERGY,15.
MLA Shao ZY,et al."Tip leakage flow analysis of an axial turbine under the effect of separation at low Reynolds number".PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART A-JOURNAL OF POWER AND ENERGY (2019):15.
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