For a finite-length cylinder rotor, rotation induces unique pattern tip vortices at the free end, significantly altering the aerodynamic characteristics of the rotor. Endplates are often applied to finite-length cylinders as a means of restraining end effects. The endplates change the aerodynamic characteristics of the rotor by affecting the end axial flow. In the present study, cylinder rotors with static and rotating endplates of various diameters are investigated by means of large eddy simulation. By analyzing the aerodynamic force, wind pressure, and flow field characteristics of the rotors, the varying patterns and reasons for the aerodynamic characteristics of rotors with static and rotating endplates are clarified. The results show that the endplate induces disk vortices and changes the vortex patterns at the free end of the rotor, and the static endplates show little effect on the development of tip vortices, so the wake vortices show the triple vortex pattern, whereas the rotating endplates enhance the intensity of the plate vortices and inhibit the tip vortices development, leading to the double vortex pattern, which in turn produces a different pattern of aerodynamic characteristics compared to the rotor with the static endplates. The mechanism of the variation in the aerodynamic characteristics and vortex patterns is partially explained by analyzing and discussing the flow field results.
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July 2024
Research Article|
July 01 2024
Numerical investigation of cylinder rotors with various endplates
Jianhan Liu (刘剑寒)
;
Jianhan Liu (刘剑寒)
(Data curation, Formal analysis, Investigation, Software, Visualization, Writing – original draft)
1
School of Civil Engineering, Shijiazhuang Tiedao University
, Shijiazhuang 050043, Hebei, China
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Wenyong Ma (马文勇)
;
Wenyong Ma (马文勇)
a)
(Conceptualization, Data curation, Funding acquisition, Investigation, Supervision, Writing – review & editing)
1
School of Civil Engineering, Shijiazhuang Tiedao University
, Shijiazhuang 050043, Hebei, China
2
Innovation Center for Wind Engineering and Wind Energy Technology of Hebei Province
, Shijiazhuang 050043, Hebei, China
a)Author to whom correspondence should be addressed: [email protected]
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Deqian Zheng (郑德乾)
;
Deqian Zheng (郑德乾)
(Formal analysis, Writing – review & editing)
3
School of Civil Engineering, Henan University of Technology
, Zhengzhou 450001, Henan, China
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Longqian Jin (金龙乾)
;
Longqian Jin (金龙乾)
(Investigation, Software, Visualization)
1
School of Civil Engineering, Shijiazhuang Tiedao University
, Shijiazhuang 050043, Hebei, China
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Qi Liu (刘奇)
Qi Liu (刘奇)
(Investigation, Validation, Visualization)
1
School of Civil Engineering, Shijiazhuang Tiedao University
, Shijiazhuang 050043, Hebei, China
Search for other works by this author on:
Qi Liu (刘奇)
1
1
School of Civil Engineering, Shijiazhuang Tiedao University
, Shijiazhuang 050043, Hebei, China
2
Innovation Center for Wind Engineering and Wind Energy Technology of Hebei Province
, Shijiazhuang 050043, Hebei, China
3
School of Civil Engineering, Henan University of Technology
, Zhengzhou 450001, Henan, China
a)Author to whom correspondence should be addressed: [email protected]
Physics of Fluids 36, 074101 (2024)
Article history
Received:
May 04 2024
Accepted:
June 10 2024
Citation
Jianhan Liu, Wenyong Ma, Deqian Zheng, Longqian Jin, Qi Liu; Numerical investigation of cylinder rotors with various endplates. Physics of Fluids 1 July 2024; 36 (7): 074101. https://doi.org/10.1063/5.0217359
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